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HP LaserJet 4200, 4250, 4300 and 4350 Series printers Service Manual.
Copyright and License © 2004 Copyright Hewlett-Packard Development Company, LP Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. The information contained in this document is subject to change without notice.
Table of contents 1 Product information Chapter contents........................ ............... ......... .................. . ........................ .................... ......................1 Printer configurations............... ...............
Envelopes with double side-seams............... ...................... ................... .......... ....35 Envelopes that have adhesive strips or flaps............. ............... .............. ............35 Envelope margins............. ........
Information menu............................................................................................................... ... 63 Paper-handling menu............... ............. ................. ............................. ............ ......
Basic operation of the printer.............................................................................................. 105 Printer operating sequence................................................................................ 105 Control system overview.
Stacker-feed stationary jam.................. .................................................. ...........141 Stacker residual-media jam............ .............................. .................... ........ .........141 Stapler/stacker ..........
Removal and replacement strategy................. .............................. ..................... .................. ......... ......168 Required tools...............................................................................................
Tray 1 paper-pickup assembly ............... .................... .............. ....................... ..................257 Paper-feed assembly.........................................................................................................
Networking tab ................... ........................................ .......................... .............316 Other links ........................ . ................................ ............... ........ ......... ................317 Printer Status and Alerts software .
Paper-path checklist........... ............... ..................... ...................... .............. ........369 Paper-path test ................... .................. .... ............... ................................ ..........369 To perform a paper-path test.
HP LaserJet 4250 wiring diagram .... ........................................................ ............. ............427 HP LaserJet 4300 wiring diagram .... ........................................................ ............. ............428 HP LaserJet 4350 wiring diagram .
1 Product information Chapter contents ● Printer configurations ● Model and serial numbers ● Printer overview ● Software components ● Specifications ● Media specifications ● Hewlett-Pack.
Printer configurations The HP LaserJet 4200, 4250, 4300 and 4350 Series printers are available in a total of six models. Base model Table 1-1 Printer descriptions, base models Base model A vailability.
n model Table 1-2 Printer descriptions, n model n model A vailability Configuration HP LaserJet 4200n printer (Q2426A) ■ 64 MB RAM, expandable to 416 MB ■ One 100-sheet tray and one 500-sheet tray.
tn model Table 1-3 Printer descriptions, tn model tn model A vailability Configuration HP LaserJet 4200tn printer (Q2427A) ■ 64 MB RAM, expandable to 416 MB ■ One 100-sheet tray and two 500-sheet .
dtn model Table 1-4 Printer descriptions, dtn model dtn model A vailability Configuration HP LaserJet 4200dtn printer (Q2428A) ■ 64 MB RAM, expandable to 416 MB ■ One 100-sheet tray and two 500-sh.
dtns model Table 1-5 Printer descriptions, dtns model dtns model A vailability Configuration HP LaserJet 4200dtns printer (Q2446A) ■ 64 MB RAM, expandable to 416 MB ■ One 100-sheet tray and two 50.
dtnsl models Table 1-6 Printer descriptions, dtnsl model dtnsl model A vailability Configuration HP LaserJet 4200dtnsl printer (Q2447A) ■ 64 MB RAM, expandable to 416 MB ■ One 100-sheet tray and t.
Model and serial numbers The model number and printer serial number are listed on an identification label located under the top cover on the right side of the printer.
Printer overview Hardware components Before working with the printer, familiarize yourself with its parts. 7 1 2 3 4 5 6 Figure 1-2 Hardware components; front view 1 Top output bin 2 Control panel 3 T.
9 8 10 Figure 1-3 Hardware components; rear view 8 Interface ports (see Interface ports ) 9 Slot for optional duplexer 10 Rear output bin (pull to open) 10 1 Product information.
Interface ports The printer has five ports: two EIO slots and three ports for connecting to a computer or a network. 1 3 2 4 5 6 Figure 1-4 Interface ports (HP LaserJet 4250 is shown) 1 EIO slot 2 2 D.
Software components The printer comes with helpful software, including printer drivers and optional software. For easy printer setup and access to the full range of printer features, HP recommends that the user install the software that is provided.
Printer drivers Drivers included Printer drivers provide access to the printer features and allow the computer to communicate with the printer (by using a printer language). Check the install notes, Readme, and late-breaking Readme files on the printer CD for additional software and languages.
Additional drivers The following drivers are not included on the CD, but are available from the Internet. ■ OS/2 PCL 5 or PCL 6 printer driver ■ OS/2 PS printer driver ■ UNIX model scripts ■ Linux drivers ■ HP OpenVMS drivers NOTE The OS/2 drivers are available from IBM and are packaged with OS/2.
Using the printer drivers Use one of the following methods to open the printer drivers from the computer: Operating System To change the settings for all print jobs until the software program is close.
Operating System To change the settings for all print jobs until the software program is closed To change the print-job default settings (for example, to turn on Print on Both Sides by default) To cha.
Software for Macintosh computers The HP installer provides PostScript Printer Description (PPD) files, Printer Dialog Extensions (PDEs), and the HP LaserJet Utility for use with Macintosh computers. The embedded Web server can be used with Macintosh computers if the printer is connected to a network.
Specifications Hardware specifications Table 1-7 Product dimensions Printer model Width Depth Height Weight 1 HP LaserJet 4200, 4200n, 4200L, 4200Ln, 4300, and 4300n 418 mm (16.5 inches) 451 mm (17.8 inches) 366 mm (14.4 inches) 20 kg (45 lb) HP LaserJet 4250, 4250n, 4350, and 4350n 418 mm (16.
Table 1-9 Printer accessories A ccessory Width Depth Height Weight 500-sheet feeder 418 mm (16.5 inches) 451 mm (17.8 inches) 121 mm (4.8 inches) 7 kg (15.4 lb) 1,500-sheet feeder 416 mm (16.4 inches) 514 mm (20.2 inches) 286 mm (11.3 inches) 13 kg (28.
Electrical specifications WARNING! Power requirements are based on the country/region where the printer is sold. Do not convert operating voltages. This can damage the printer and void the product warranty.
Table 1-14 Power consumption, HP LaserJet 4250 (average, in watts) 1 Product model Printing 2 Ready Sleep 4 Off HP LaserJet 4250 675 W 3 20 W 18 W 0.2 W HP LaserJet 4250n 675 W 3 20 W 18 W 0.2 W HP LaserJet 4250tn 675 W 3 20 W 18 W 0.2 W HP LaserJet 4250dtn 675 W 3 21 W 19 W 0.
Acoustic emissions Table 1-17 Sound power and pressure level 1 , HP LaserJet 4200 2 Sound power level Declared per ISO 9296 Printing 3 (HP LaserJet 4200) L WAd = 6.
Table 1-19 Sound power and pressure level 1 , HP LaserJet 4250 2 Sound power level Declared per ISO 9296 Printing 3 (HP LaserJet 4250) L WAd = 6.9 Bels (A) [69 dB(A)] Ready (HP LaserJet 4250) L WAd = 4.
Print speed specifications Table 1-22 Print speed specifications Printer model Letter A4 HP LaserJet 4200 35 ppm 33 ppm HP LaserJet 4200L 30 ppm 33 ppm HP LaserJet 4250 45 ppm 43 ppm HP LaserJet 4300 .
Media specifications This section contains information about the sizes, weights, and amount of media that each tray supports. General guidelines Some print media might meet all of the guidelines in this manual and still not produce satisfactory results.
■ Guidelines for using paper ■ Paper weight equivalents ■ Labels ■ Overhead transparencies ■ Envelopes ■ Card stock and heavy paper Supported media weights and sizes This section contains information about the sizes, weights, and amount of paper and other print media that each tray supports.
Size Dimensions 1 Weight Capacity 2 Envelope, DL ISO 110 x 220 mm (4.3 x 8.7 inches) Envelope, C5 ISO 162 x 229 mm (6.4 x 9.0 inches) Envelope, B5 ISO 176 x 250 mm (6.
Size Dimensions 1 Weight Capacity 2 Custom Minimum: 148 x 210 mm (5.8 x 8.3 inches) Maximum: 216 x 356 mm (8.5 x 14 inches) NOTE For additional information about using custom media, see the notes under Media specifications . 1 The printer supports a wide range of sizes.
Table 1-29 Optional stacker or stapler/stacker supported sizes and weights Size Dimensions 1 Weight Capacity 2 Stacker or stacker part of stapler/stacker only Letter 216 x 279 mm (8.5 x 11 inches) 60 to 120 g/m 2 (16 to 32 lb) 500 sheets of 75 g/m 2 (20 lb) paper A4 210 x 297 mm (8.
Paper and print media Category Specifications Acid content 5.5 pH to 8.0 pH Caliper 0.094 to 0.18 mm (3.0 to 7.0 mils) Curl in ream Flat within 5 mm (0.02 inch) Cut-edge conditions Cut with sharp blades, leaving no visible fray Fusing compatibility Must not scorch, melt, offset, or release hazardous emissions when heated to 200° C (392° F) for 0.
45% to 55%. The following guidelines should be helpful when evaluating the paper-storage environment: ■ Paper should be stored at or near room temperature. ■ The air should not be too dry or too humid (because of the hygroscopic properties of paper).
Guidelines for using paper For best results, use conventional 75- to 90-g/m 2 (20- to 24-lb) paper. Make sure that the paper is of good quality, and free of cuts, nicks, tears, spots, loose particles, dust, wrinkles, voids, and curled or bent edges.
Table 1-30 Paper weight equivalents U.S. postcard 1 thickness (mm) U.S. bond weight (lb) U.S. text/ book weight 2 (lb) U.S. cover weight (lb) U.S. Bristol weight (lb) U.
Envelopes If you do not have an optional envelope feeder, always print on envelopes from tray 1. If envelopes curl or jam, try opening the rear output bin. CAUTION Do not use the duplexer to print on envelopes. Damage to the printer might result. Do not send envelopes to the stacker or stapler/stacker.
Envelopes with double side-seams Double side-seam construction has vertical seams at both ends of the envelope rather than diagonal seams. This style might be more likely to wrinkle. Make sure that the seam extends all the way to the corner of the envelope, as illustrated.
Labels Use tray 1 to print on labels. Labels are multiple-layer media that typically consists of a face sheet (the printable surface), pressure-sensitive adhesive, and a liner (a carrier sheet coated with a release agent). Labels that are used in the HP LaserJet printer must be specifically designed for laser printers.
Card stock and heavy paper Many types of card stock can be printed on from tray 1, including index cards and postcards. Some card stock performs well because its construction is better suited for feeding through a laser printer.
Types of media to avoid The following characteristics can affect the performance of the HP LaserJet 4200, 4250, 4300 and 4350 Series printers printer unless the paper or other print media that is used is specifically designed to work with HP LaserJet printers.
Hewlett-Packard limited warranty statement PRODUCT DURATION OF LIMITED WARRANTY HP LaserJet 4200, 4200n, 4200tn, 4200dtn, 4200dtns, 4200dtnsL, 4200L, 4200Ln, 4250, 4250n, 4250tn, 4250dtn, 4250dtnsl, 4.
TO THE MANDATORY STATUTORY RIGHTS APPLICABLE TO THE SALE OF THIS PRODUCT TO YOU. 40 1 Product information.
Print Cartridge Limited Warranty Statement This HP Print Cartridge is warranted to be free from defects in materials and workmanship. This warranty does not apply to print cartridges that (a) have bee.
Service approach Repair of the printer normally begins by using the printer's internal diagnostics in conjunction with the troubleshooting procedures that are described in chapter 6. When a faulty part is located, repair is generally accomplished by assembly-level replacement of field-replaceable units (FRUs) (listed in chapter 7).
Regulatory information This section contains regulatory statements for this product. FCC regulations This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules.
Environmental product stewardship program This section explains HP's environmental stewardship initiatives. Protecting the environment Hewlett-Packard Company is committed to providing quality products in an environmentally sound manner. This product has been designed with several attributes to minimize impacts on our environment.
HP LaserJet printing supplies In many countries/regions, the printing supplies (for example, print cartridge and fuser) can be returned to HP through the HP Printing Supplies Environmental Program. This easy-to-use and free take-back program is available in more than 30 countries/regions.
Material safety data sheet Material Safety Data Sheets (MSDS) for supplies that contain chemical substances (for example, toner) can be obtained by contacting the HP Web site at http://www.hp.com/go/msds or http://www.hp.com/hpinfo/community/environment/productinfo/safety .
Regulatory statements Declaration of Conformity according to ISO/IEC Guide 22 and EN 45014 Manufacturer's Name: Hewlett-Packard Company Manufacturer's A ddress : 11311 Chinden Boulevard, Boi.
Declaration of Conformity Manufacturer's A ddress: 11311 Chinden Boulevard, Boise, Idaho 83714-1021, USA declares, that the product Product Name: HP LaserJet 4250 and LaserJet 4350 printer Regula.
Country-/region-specific safety statements Laser safety statement The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration has implemented regulations for laser products manufactured since August 1, 1976. Compliance is mandatory for products marketed in the United States.
Finnish laser statement LASERTURVALLISUUS LUOKAN 1 LASERLAITE KLASS 1 LASER APPARAT HP LaserJet 4200, 4200n, 4200tn, 4200dtn, 4200dtns, 4200dtnsL, 4200L, 4200Ln, 4250, 4250n, 4250tn, 4250dtn, 4250dtns.
2 Installation Chapter contents ● Operating environment ● Site requirements ● Software installation Chapter contents 51.
Operating environment Place the printer on a sturdy, level surface in a well-ventilated area that meets the following environmental requirements: ■ Temperature: 15° to 32.
Site requirements The following environmental specifications must be maintained to ensure the correct operation of the printer. Consider the following points before installing the printer: ■ Install in a well-ventilated, dust-free area. ■ Install on a hard, flat, continuous surface, with all four printer feet level.
Software installation Information about installing and uninstalling the printing system software is available in chapter one of the electronic user guide on the installation cd.
3 Operation Chapter contents ● Using the control panel ● Control-panel menus Chapter contents 55.
Using the control panel The following sections describe the use and layout of the printer control panel. Control-panel layout The printer contains the following lights and buttons on the control panel.
Control-panel lights The control-panel lights provide information about printer status. Light State Indication Ready On The printer is online and ready to accept data to print. Off The printer cannot accept data because it is offline (paused) or has experienced an error.
Control-panel buttons Button Function C ANCEL J OB (HP LaserJet 4200/4300 Series printers) S TOP (HP LaserJet 4250/4350 Series printers) ■ Cancels the current print job in process and expels all of the active pages from the paper path. The time that it takes to cancel the job depends on the size of the print job.
Settings and defaults The printer makes most printing decisions based on either temporary settings or permanent defaults. NOTE Settings that are sent from software programs override printer defaults.
Control-panel menus Most routine printing tasks that the printer performs originate from a computer software program or a printer driver. These two methods are the most convenient way to control the printer, and they override the printer control-panel settings.
To change a control-panel setting 1 Press ( S ELECT button) or the M ENU button to open the menus. 2 Use ( U P A RROW button) or ( D OWN A RROW button) to scroll to the menu that you want, and then press . 3 Some menus might have several submenus. Use or to scroll to the submenu item that you want, and then press .
Retrieve Job menu This menu provides a list of the stored jobs in the printer and access to all of the job-storage features. You can print or delete these jobs at the printer control panel. NOTE If you turn the printer power off, all stored jobs are deleted unless an optional hard disk is installed.
Information menu The Information menu contains printer information pages that give details about the printer and its configuration. Scroll to the information page that you want, and then press ( S ELECT button). Item Explanation PRINT MENU MAP The menu map shows the layout and current settings of the printer-control-panel menu items.
Paper-handling menu If paper-handling settings are correctly configured at the printer control panel, you can print by selecting the type and size of media in the program or the printer driver. For more information about supported media types and sizes, see Supported media weights and sizes and Paper and print media .
Item Values Explanation B5 (JIS) EXECUTIVE (JIS) D POSTCARD (JIS) 16K ENVELOPE 10 ENVELOPE MONARCH ENVELOPE C5 ENVELOPE DL ENVELOPE B5 CUSTOM TRAY 1 TYPE *ANY PLAIN PREPRINTED LETTER HEAD TRA N SPA RE.
Item Values Explanation *PLAIN PREPRINTED LETTER HEA D TRANSPA RENCY PREPUNCHED LABELS BOND RECYCLED COLOR CARDSTOCK > 64 g/m2 ROUGH TRAY [N] TYPE ANY *PLAIN PREPRINTED LETTER HEA D TRANSPA RENCY P.
Item Values Explanation Y DIMENSION UNIT OF MEASURE : Use this option to select the unit of measure to use when you set custom paper sizes for the specified tray. X DIMENSION : Use this item to set the measurement of the width of the paper (measurement from side to side in the tray).
Configure-device menu This menu contains administrative functions. Printing submenu Print-quality submenu System Setup submenu Stapler/stacker submenu I/O submenu Resets submenu (HP LaserJet 4250/4350 only) Printing submenu Some items on this menu are available in the program or printer driver (if the appropriate driver is installed).
Item Values Explanation EXECUTIVE (JIS) DPOSTCARD (JIS) 16K ENVELOPE 10 ENVELOPE MONARCH ENVELOPE C5 ENVELOPE DL ENVELOPE B5 CUSTOM DEFAULT CUSTOM PAPER SIZE UNIT OF MEASURE X DIMENSION Y DIMENSION Use this item to set a default custom paper size for tray 1 or any 500-sheet tray.
Item Values Explanation YES NO : Up to 78 10-pitch characters can be printed on one line YES : Up to 80 10-pitch characters can be printed on one line PRINT PS ERRORS *OFF ON Use this item to select whether or not a PS error page prints or not.
Print-quality submenu Some items on this menu are available in the program or printer driver (if the appropriate driver is installed). Program and printer-driver settings override control-panel settings. In general, it is best to change these settings in the printer driver, if applicable.
Item Values Explanation ROUGH ENVELOPE CAUTION Do not change the fuser mode for transparencies. Failure to use the LOW 2 setting while printing transparencies can result in permanent damage to the printer and fuser. Always select Transparencies as the Type in the printer driver and set the tray type at the printer control panel to TRANSPA RENCY .
Item Values Explanation CAUTION HP does not recommend full-time use of EconoMode. If EconoMode is used full-time, it is possible that the toner supply will outlast the mechanical parts in the print cartridge. TONER DENSITY 1 to 5 (*3) Lighten or darken the print on the page by setting the toner density.
System Setup submenu Items on this menu affect printer behavior. Configure the printer according to your printing needs. The section that follows lists the settings and possible values. In the Values column, the default value for each setting is the one with an asterisk (*) next to it.
Item Values Explanation PS DEFER MEDIA : Use this item to control whether the PostScript (PS) or HP paper-handling model is used to print jobs. ENABLED causes PS to defer to the HP paper- handling model.
Item Values Explanation CA RTRIDGE LOW STOP *CONTINUE Use this item to specify how the printer behaves if the print cartridge is low. For the HP LaserJet 4250 Series printer, the message first appears when about 15% (10,000-page cartridge) or about 8% (20,000-page cartridge) of the life remains in the print cartridge.
Stapler/stacker submenu Use this submenu to select settings for the optional stapler/stacker, if it is installed. Some items on this menu are available in the program or printer driver (if the appropriate driver is installed). The section that follows lists the settings and possible values.
Item Values Explanation ADVANCED FUNCTIONS : Turn the bidirectional parallel communication on or off. The default is set for a bidirectional parallel port (IEEE-1284). The function allows the printer to send status readback messages to the computer. (Turning the parallel advanced functions on might slow language switching.
kit should be installed to maintain optimum print quality and feed performance. For more information, see Performing preventive maintenance . To order the printer maintenance kit, see Ordering parts and supplies . SLEEP MODE *ON OFF Turns Sleep Mode on or off.
Diagnostics menu (HP LaserJet 4250/4350 only) Administrators can use this submenu to isolate parts and to troubleshoot jam and print-quality issues. The section that follows lists the settings and possible values. In the Values column, the default value for each setting is the one that has an asterisk (*) next to it.
4 Maintenance Chapter contents ● Cleaning the printer and accessories ● Performing preventive maintenance ● Maintaining the stapler unit ● Downloading a remote firmware update ● Remote firmware update using FTP through a browser ● Remote firmware update using Fetch (Mac OS 8.
Cleaning the printer and accessories To maintain superior print quality and performance, thoroughly clean the printer and the paper- handling accessories at the following times: ■ Every time you change the print cartridge. ■ After printing approximately 10,000 pages.
Component Cleaning method/notes Inside With a dry, lint-free cloth, wipe any dust, spilled toner, and paper particles from the paper- path area, the registration roller, and the print-cartridge cavity. Do not touch the transfer roller with bare hands.
5 Use or to scroll to CREATE CLEANING PAGE (LJ 4200/4300) or PROCESS CLEANING PAGE (LJ 4250/4350), and then press . 6 Follow the instructions on the cleaning page to complete the cleaning process (LJ 4200/4300 only). 7 If a duplexer is installed, close the rear output bin.
Running the cleaning page automatically Use the following procedure to set the printer to print cleaning pages automatically at a specified interval. In order for the cleaning page to run without intervention, the selected size and the plain paper type must be available in the printer.
Performing preventive maintenance Replace specific parts when the PERFORM PRINTER MAINTENANCE message appears on the printer control-panel display. This helps the printer maintain optimum performance.
Resetting the maintenance-kit counter (LJ 4250/4350) After a maintenance kit is installed, the maintenance-kit counter must be reset by using the following procedure. 1 Turn the printer off and then on. 2 When 000MB (the beginning of the memory-count) appears on the control-panel display, press and hold down ( S ELECT button).
Expected life of components The following table shows the expected life of certain components in the printer. To order parts, see Ordering parts and supplies .
Maintaining the stapler unit Follow these instructions to maintain the stapler unit. To remove and replace the stapler unit 1 Locate the stapler unit on the right side of the stapler/stacker. 2 Rotate the stapler unit toward the front of the printer until the unit clicks.
Loading staples Load staples if the printer control-panel display prompts you with a STAPLER LOW ON STAPLES message (the staple cartridge contains fewer than 70 staples) or a STAPLER OUT OF STAPLES message (the staple cartridge contains 15 or fewer staples).
Downloading a remote firmware update A remote firmware update (RFU) can be downloaded from the following Web sites: http://www.hp.com/go/lj4200_firmware , http://www.hp.com/go/lj4250_firmware , http://www.hp.com/go/ lj4300_firmware , or http://www.hp.
Remote firmware update through a local Windows port If the printer is connected through a local port (USB or parallel), then you can send the RFU file directly to the printer by using a Copy command from a command prompt or an MS-DOS window. At the command prompt, perform the following steps for your operating system.
Windows NT 4.0, Windows 2000, Windows XP, or Windows Server 2003 The .rfu file can be sent directly to the printer by typing a copy command at a command prompt or in an MS-DOS window. 1 At a command prompt, type: copy /b <FILENAME> <PORTNAME> where <FILENAME> is the name of the .
Windows operating systems 1 Take note of the TCP/IP address on the EIO Jetdirect page. The HP Jetdirect page is the second page of the configuration page printout. NOTE Before connecting to the printer, make sure that the printer is not in PowerSave or Sleep mode.
Mac operating systems 1 Take note of the TCP/IP address on the EIO Jetdirect page. The Jetdirect page is the second page of the configuration page printout. 2 Open a Terminal window on the Macintosh. You can find the Terminal Program on the computer hard drive in the Applications/Utilities folder.
Remote firmware update using FTP through a browser Follow these instructions to use FTP through a browser to update the printer firmware remotely. NOTE The following instructions can be used on Windows or Macintosh operating systems. 1 Open a browser window.
Remote firmware update using Fetch (Mac OS 8.6 and OS 9. x only) For Mac OS 8.6 through 9. x , a shareware program called Fetch provides FTP control for a Put command. Download and install the program from http://download.cnet.com/ downloads/0-10207-10 0-5250613.
Remote firmware update using the HP LaserJet utility (Mac OS 8.6 and OS 9. x only) Follow these instructions to update the firmware by using the HP LaserJet utility. 1 The first step is to make sure that you have the tools and files that are necessary for the update.
Remote firmware update using the LPR command NOTE This remote firmware update method is for use in Windows NT 4.0, Windows 2000, Windows XP, and Windows Server 2003. Follow these instructions to update the printer software remotely by using the LPR command.
Using HP Web JetAdmin to download the firmware to the printer The following procedure requires that you install HP Web JetAdmin version 7.0 or later on your computer. Complete the following steps to update a single printer through HP Web JetAdmin after downloading the RFU file from the HP Web site.
Printer messages during firmware update The printer shows three messages that appear during a normal update process. Table 4-4 Update messages Printer message Explanation RECEIVING UPGRADE Appears when the printer recognizes the start of an RFU update and remains until the printer verifies the validity and integrity of the RFU update.
Troubleshooting a firmware update The following table lists the causes and results of possible interruptions to the firmware update. Table 4-5 Troubleshooting a firmware update Cause Result The control panel cancelled a job. No update occurred. A break in the I/O stream occurred during a send.
5 Theory of operation Chapter contents ● Introduction ● General descriptions ● Paper-pickup-and-feed system ● Stacker and stapler/stacker ● Image-formation system ● Formatter system Chapte.
Introduction This chapter presents an overview of the relationships among major components in the printer. It also provides a general description of the following topics: ■ Basic operation of the pr.
Basic operation of the printer Printer operation can be divided into four systems: the control system (which includes the power supply and dc controller PCA), the pickup and feed system (which consist.
Pickup-and-feed system overview The pickup-and-feed system consists of a motor, various rollers, and sensors that detect the presence of media, transport the media into and through the printer, and deliver the media to an output bin.
General descriptions This section describes the following printer components. ■ Dc controller PCA ■ Power-supply assembly ■ Pickup-and-feed assembly ■ Laser/scanner assembly ■ Image-formatio.
Dc controller PCA The dc controller PCA controls the operation of the printer and its components. The dc controller PCA starts printer operation when the printer power is turned on and the power supply sends dc voltage to the dc controller PCA.
Motor and fan control The HP LaserJet 4200 Series printers contain three dc brushless motors: the main motor, the lifter- driver motor (inside of the lifter-driver assembly), and a fan motor. The main motor is used for image formation (rotating the photosensitive drum in the print cartridge) and paper pickup and feed.
Power supply The power supply consists of the fuser-control circuit, the high-voltage circuit, and the low-voltage circuit. The fuser-control and high-voltage circuits control the temperature of the fuser and generate high-voltage according to signals from the dc controller PCA.
Figure 5-3 Fuser components Fuser over-temperature protection The fusing heater safety circuit is located on the power supply and constantly monitors the fusing temperature. To protect the fuser from excessive temperatures, the printer has the following three protective functions: ■ The CPU monitors the voltage of the thermistor.
Laser/scanner assembly The laser/scanner produces the latent electrostatic image on the photosensitive drum in the print cartridge. The main components of the laser/scanner assembly are the laser driver PCA, the scanner motor, various mirrors, and the focusing lenses.
strike the six-sided scanning mirror and are directed through the focusing lenses and onto the photosensitive drum. The modulated laser beams generate the latent electrostatic image on the photosensitive drum according to the image data signals that the dc controller PCA sends.
Paper-pickup-and-feed system The pickup-and-feed system consists of various rollers that the printer motors drive. The printer uses tray 1 (the manual feeding tray) and a cassette in tray 2 as media sources. The printed media is delivered to either the rear output bin (straight-through printing) or the top output bin (the default destination).
Figure 5-5 Printer paper-pick up-and-feed block diagram Paper-pickup-and-feed system 115.
Pickup-and-feed block The pickup-and-feed system is divided into two blocks: The pickup-and-feed block and the fuser/ delivery block. Figure 5-6 Pickup-and-feed and fuser/delivery block diagram 1 Fuse.
As the pre-feed sensor (PS102) detects the media, the dc controller PCA turns off the clutch, which stops the media. When the dc controller PCA detects that the laser/scanner is ready it activates the feed clutch again. The feed roller moves the media farther into the printer.
T ra y 1 pickup roller T ra y 1 pickup solenoid Separation pad Lifter Cam Figure 5-7 Tray 1 pickup 118 5 Theory of operation.
Printing from tray 2 When the dc controller PCA receives the print command, the main motor (M101) and scanner motor start their rotation. When the main motor reaches its prescribed speed, the feed roller clutch (CL101) and tray 2 pickup solenoid (SL101) are activated.
The tray 2 cassette can detect the media size by using the switches described; however, the user can define the media size for the tray by using the control panel (see Paper-handling menu ). In this case, the printer might not detect the media size correctly if the size that the user defined does not match the tray settings.
Multiple-feed prevention The printer uses the separation roller in tray 2 to prevent multiple-feeding. Normally, the separation roller rotates in the same direction as the feed roller.
Fuser/delivery block The pickup-and-feed system is divided into two blocks: the pickup-and-feed block and the fuser/ delivery block. Figure 5-9 Pickup-and-feed and fuser/delivery block diagram 1 Fuser/delivery block 2 Pickup-and-feed block The fuser/delivery block consists of rollers, sensors, the fuser, and the output delivery assembly.
Printer pickup delay jam from tray 1 If the top-of-page sensor (PS103) does not detect the leading edge of the media within a specific period of time after the media is picked up, the microprocessor on the dc controller PCA determines that a pickup jam has occurred.
If the fuser delivery sensor (PS108) does not detect the trailing edge of the media within a specified period of time after a printer delivery wrap jam is detected, or if the fuser delivery sensor (PS.
Printing from the 500-sheet feeder NOTE HP LaserJet 4200/4300 Series printers support up to two optional 500-sheet feeders. HP LaserJet 4250/4350 Series printers support up to three optional 500-sheet feeders. The paper-feeder driver controls the 500-sheet feeder operation sequences.
500-sheet feeder pickup and feeding Three switches on the paper-feeder driver detect the media size and the presence of the 500-sheet tray. The relationship between the switch combinations and the paper sizes is the same as for the printer. The main motor (M101) drives the paper feeder.
Figure 5-11 500-sheet feeder pickup-and-feed diagram Paper-pickup-and-feed system 127.
Printing from the 1,500-sheet feeder The paper-feeder driver controls the 1,500-sheet feeder operation sequences. An 8-bit microprocessor in the paper-feeder driver controls the 1,500-sheet feeder sequences and the communication with the dc controller PCA.
1,500-sheet feeder pickup and feeding Three switches on the paper-feeder driver detect the media size and the presence of the 1,500-sheet tray. The relationship between the switch combinations and the paper sizes is the same as for the printer. The main motor (M101) drives the paper feeder.
Figure 5-13 1,500-sheet feeder pickup-and-feed diagram 130 5 Theory of operation.
1,500-sheet feeder lifting mechanism The lifting mechanism maintains the media-stack surface at a specific position inside the 1,500-sheet feeder. So that the feeder can perform a stabilized pickup operation regardless of the size of the media in the feeder.
Envelope feeder The envelope-feeder driver controls the envelope feeder operation sequences. An 8-bit microprocessor in the envelope feeder driver controls the envelope-feeder sequence and the communication with the dc controller PCA. The dc controller PCA sends the pickup command to the envelope-feeder driver with the necessary timing.
Figure 5-16 Envelope-feeder pickup-and-feed diagram Envelope feeder jam detection The envelope feeder uses the envelope multiple-feed sensor (PS902) along with sensors in the printer to detect the presence of media and to determine whether the media is feeding correctly or is jamming.
Duplexer The duplexer driver controls the duplexer operation. An 8-bit microprocessor in the duplexer driver controls the duplexer sequence and the communication with the dc controller PCA. The duplexer driver drives the solenoid, motors, and fan according to commands that the dc controller PCA sends to the duplexer.
Reversing and duplexer pickup The duplexer has two stepping motors: the reversing motor (M701) and the duplex-feed motor (M702). The duplexer driver controls forward and reverse motor rotations. The duplexer solenoid controls the face-up output tray diverter, which feeds paper to the duplexer.
Duplexer jam detection The following sensors detect whether or not the print media is present and is feeding normally. ■ Tray 2 paper sensor (PS101) ■ Pre-feed sensor (PS102) ■ Top-of-page senso.
Stacker and stapler/stacker The stacker delivers media from the printer to the stacker delivery bin. The stapler/stacker also delivers media from the printer to the stacker delivery bin, but can staple the media together before delivering it to the stapler/stacker delivery bin.
Figure 5-20 Power-on sequence for the stacker and stapler/stacker 138 5 Theory of operation.
Stacker The dc controller PCA controls the stacker and sends signals to the stacker-driver PCA. The stacker- driver PCA then controls the operation of the stacker components such as the stacker motor, solenoid, and sensors. When the printer power is turned on, dc power from the printer low-voltage supply circuit is supplied to the stacker.
Figure 5-21 Stacker-feed delivery diagram 140 5 Theory of operation.
Stacker jam detection The stacker uses the following sensors to detect the presence of media and to verify whether the media is feeding correctly or is jamming. For information about the location of these sensors, see Stacker and stapler/stacker switches and sensors .
Stapler/stacker The dc controller PCA controls the stapler stacker by sending signals to the stapler/stacker PCA. The stapler/stacker PCA controls the stapler/stacker motor, solenoids, sensors, and the stapler unit. When the printer power is turned on, the printer low-voltage supply circuit supplies dc power to the stapler/stacker.
Component Purpose Staple-presence switch (SW1102) Detects the presence of staples in the stapler cartridge Staple home-position switch (SW1103) Determines whether the stapler cam is in the home positi.
Staple-mode feed and delivery In this mode, 2 to 15 pages of media are stapled into one set and the stacks are then delivered to the delivery bin. After the leading edge of the media reaches the fuser-delivery sensor (PS108) in the printer, the dc controller PCA sends a signal to the stapler/stacker-driver PCA.
Figure 5-24 Staple-mode feed and delivery diagram (2 of 6) At a specific time after the paper-inlet sensor (PS1101) detects the leading edge of the media, the stapler/stacker PCA changes the speed of the feed motor (M1103) to synchronize the feed rollers with the speeds of the other stapler/stacker motors and rollers.
Figure 5-26 Staple-mode feed and delivery diagram (4 of 6) Stapler/stacker operation depends on whether the device detects the final page in the staple job.
(M1102) to move the jogger guide into the turn-out position and allow the stack to drop into the delivery bin. Figure 5-28 Staple-mode feed and delivery diagram (6 of 6) Figure 5-29 Staple-mode timing.
Stapler unit The major components of the stapler unit are the stapler motor (M104), the staple cartridge, the staple-detection switch, and the staple-module home-position switch. The staple cartridge holds a maximum of 1,000 staples. The stapler/stacker-driver PCA controls the stapler unit.
Stapler-unit operation The stapler unit uses the stapler unit motor (M104), staple cam, staple-press head-plates, staple arm, and support base to staple media together. Use the printer settings to turn on the staple mode (see Stapler/stacker submenu ).
As staple cam 1 rotates, it raises the staple-press head-plate 1. This forms the flat staple into a "u" shape. While this is happening, the staple arm raises the swing guide. Figure 5-33 Staple operation (2 of 3) As staple cam 2 rotates, it raises staple-press head-plate 2.
Staple level-detection The stapler/stacker-driver PCA uses the staple-detection switch to detect the presence and number of staples in the stapler unit. A spring on the staple-detection switch holds the staple-detection flag in the raised position. When this flag is fully raised, the switch is open.
Stapler/stacker jam detection The following sensors detect the presence of media in the stapler/stacker and determine whether the media is feeding correctly or jamming. For information about the location of these sensors, see Stacker and stapler/stacker switches and sensors .
Image-formation system The image-formation system is the main system in the printer. It consists of five stages: ■ Electrostatic latent (potential) image formation During this operation, a uniform negative charge is applied to the surface of the photosensitive drum in the print cartridge.
Figure 5-36 Image-formation block diagram 154 5 Theory of operation.
Electrostatic latent-image formation Forming the electrostatic latent image on the photosensitive drum requires applying a uniform negative charge (bias) to the surface of the drum and then the exposing it to the laser beam. The laser beam neutralizes the section of the drum that will it attract toner during the developing operation.
At the beginning of each sweep, the beams strike the beam-detect mirror and, generating the beam- detect (BD) signal. The BD signal is sent to the dc controller PCA, where it is converted to an electr.
Transferring the image During the transferring process, the toner image on the drum surface is transferred to the print media. A positive charge that the transfer roller applies to the back of the media causes the negatively charged toner on the drum surface to be attracted to the sheet of media.
Fusing the image The image is held in place only by electrostatic attraction when it is transferred from the drum to the media. The lightest touch will smear it. During the fusing process, heat and pressure fuse the image to the media to produce a permanent image.
Cleaning the transfer charging roller and photosensitive drum Residual (leftover) toner is cleaned off of the transfer charging roller and photosensitive drum so that subsequent images are crisp and clear. Because not all of the toner is attracted to the media when the image is transferred from the drum, some toner remains on the drum.
Print-cartridge memory chip The print-cartridge memory chip is a non-volatile memory (NVRAM) device that is built into the print cartridge. It stores information about the cartridge. The dc controller PCA reads and writes memory data to the memory chip at specific times to monitor the print cartridge usage and condition.
Formatter system The formatter is involved in the following procedures: ■ Controlling the PowerSave/Sleep mode ■ Receiving and processing print data from the various printer I/Os ■ Monitoring co.
Resolution Enhancement technology The formatter contains circuitry for Resolution Enhancement technology (REt), which modifies the standard video dot data on its way to the dc controller PCA to produce "smoothed" line edges. The REt can be turned on or off from the control panel or from some software programs.
Expanded I/O The optional expanded I/O (EIO) card can be installed in the designated slots on the formatter. It provides automatic I/O switching between multiple computers or networks that are connected to the printer. NOTE Only one slot is available on HP LaserJet 4200L printers.
store a full page of print-image data before the data is sent to the print engine. Memory capacity can be increased by adding DIMMs to the formatter. Note that adding memory (DIMMs) might also increase the print speed for complex graphics. DIMM slots The DIMM slots can be used to add memory.
PML The printer management language (PML) allows remote configuration and status readback through the I/O ports. Control panel The formatter sends and receives printer status and command data to and from a control-panel PCA.
166 5 Theory of operation.
6 Removing and replacing parts Chapter contents ● Removal and replacement strategy ● User-replaceable parts ● Covers, tray 1, and the rear output bin ● Control-panel display ● Main assemblie.
Removal and replacement strategy This chapter describes how to remove, replace, and reassemble the major assemblies of the printer. Replacement is generally the reverse of removal. To identify the left side and right side of the printer, face tray 1 on the front of the unit.
Before performing service ■ If possible, print a menu map and configuration page. See Menu map and Configuration page . ■ Remove all of the accessories and print media, the print cartridge, and tray 2 from the product. ■ Unplug the power cord from the power outlet at the wall receptacle.
Screws used in the printer This table describes the screws that are used in the printer and provides guidelines to help determine where each type of screw is used. The screws can vary in length depending on the thickness of the material that is being fastened.
Parts-removal tree Use the following diagram to determine the order in which parts must be removed. NOTE Some components in the parts-removal tree have a superscript number listed next to the component name (for example, "Right-side cover 1" ).
Printer input tray, and cabinet wheel locks When the printer and input trays are placed on the cabinet stand, the printer and trays must be locked together to prevent them from tipping over. This is not necessary (but it is recommended) if the printer and trays are placed on a level work surface.
Dc controller PCA diagram You must disconnect wires or cables from the dc controller PCA before you can remove or replace many of the printer components. Use the following diagram to assist with disconnecting the cables and wires from the dc controller PCA.
Figure 6-2 Connector locations on the dc controller PCA J71 J88 6-Pin connector; Envelope feeder J72 J89 3-Pin connector; Paper-feed clutch J73 J90 10-Pin connector; Tray 2 media size sensor, Tray 2 p.
User-replaceable parts The following sections discuss user-replaceable parts. Print cartridge 1 Open the control-panel door. Figure 6-3 Print cartridge (1 of 2) User-replaceable parts 175.
2 Firmly grasp the print cartridge and pull it up and out of the printer. CAUTION Do not expose the print cartridge to bright light or direct sunlight for long periods of time. This can damage the cartridge, which will result in print-quality defects.
Transfer roller 1 Open the control-panel door and tray 1. CAUTION Do not touch the black rubber on the roller. Skin oils on the roller can cause print-quality problems.
Fuser WARNING! The fuser might be very hot. After turning off the printer power, allow the fuser to cool for at least 30 minutes before removing it. 1 Remove the rear output bin. See Rear output bin . 2 Squeeze the blue fuser-release tabs (callout 1).
Tray 1 pickup roller NOTE If the optional envelope feeder is installed, press the release button on its left side and remove the feeder. Then proceed to step 2. 1 Remove the front accessory cover (callout 1). NOTE If the printer has an envelope feeder installed, this cover will not be in place.
2 Release the pickup roller by sliding apart the latches that are located on each side at the top of the roller. Lift the roller (callout 3) out of the opening.
Tray 1 separation pad NOTE If the optional envelope feeder is installed, press the release button on its left side and remove the feeder. Then proceed to step 2. 1 Remove the front accessory cover (not shown). See Accessory covers and the tray 2 extension door .
Tray 2 feed rollers 1 Remove tray 2 and place it on a level work surface. Locate and open the cover (arrow) that is next to the roller in tray 2. Figure 6-10 Tray 2 feed rollers (1 of 4) 182 6 Removin.
2 Pinch the blue latch that is on the left side of the roller. Slide the roller off of the shaft (arrows). Figure 6-11 Tray 2 feed rollers (2 of 4) CAUTION When you install this roller, make sure that it locks into place.
3 Move the front of the printer to the edge of the work surface for better access to the remaining feed rollers. To find the rollers, look up into the inside of the opening that was created when you removed tray 2.
4 Pinch the blue latch on the left side of the feed roller (two rollers are intslled here). Slide the roller off of the shaft. You might need to rotate the roller in order to pinch the latch. Figure 6-13 Tray 2 feed rollers (4 of 4) 5 Repeat the previous step for the remaining pickup roller.
Covers, tray 1, and the rear output bin The following sections describe removal and replacement of the printer covers, tray 1, and the rear output bin.
Accessory covers and the tray 2 extension door NOTE Accessory covers will not be in place if any installed accessories (for example, the optional stapler/stacker) have been removed to service the printer. 1 Grasp the rear accessory cover (the mounting position for the optional stapler/stacker or stacker).
2 Open tray 1. Grasp the front accessory cover (the mounting position for the optional envelope feeder) and pull it straight out of the printer. Figure 6-16 Accessory covers (2 of 3) 188 6 Removing an.
3 Grasp the duplexing accessory cover (the mounting position for the optional duplexer) and pull it straight out of the printer. Figure 6-17 Accessory covers (3 of 3) 4 Rotate the tray 2 extension cover to the horizontal position, and then lift up the right side of the cover to unlock its pivot bar.
5 Slide the left-side pivot pin out of its retainer to remove the cover. Figure 6-18 Tray 2 extension cover 190 6 Removing and replacing parts.
Formatter cover 1 Grasp the formatter cover. 2 Pull the cover straight back and away from the printer. Figure 6-19 Formatter cover Covers, tray 1, and the rear output bin 191.
Top cover NOTE If the optional stapler/stacker or stacker accessory is installed, lift it straight up and off of the printer to remove it. Then proceed to step 2. 1 Remove the following: ● Top accessory cover. See Accessory covers and the tray 2 extension door .
4 Remove four mounting screws (callout 3). Figure 6-21 Top cover (2 of 3) Covers, tray 1, and the rear output bin 193.
5 Grasp the top cover and carefully rotate the left edge up and away from the printer. Do not apply stress to the control-panel wire-harness (callout 4) when rotating the top cover away from the printer. CAUTION The accessory pin (callout 5) is not captive.
Right-side cover 1 Remove the following assemblies: ● Top cover. See Top cover . ● Formatter cover. See Formatter cover . ● Tray 2. 2 Open the formatter door. 3 Use a small flat-blade screw driver to push in the locking tab at the front of the printer, and then release two additional locking tabs (callout 1).
4 Rotate the right-side cover away from the printer and lift it up to remove it. Figure 6-24 Right-side cover (2 of 2) Reinstallation tip When you reinstall the right-side cover, verify that the power-switch arm (callout 1) locks onto the switch connecting rod (callout 2).
Left-side cover 1 Remove the top cover. See Top cover . 2 Release two locking tabs (callout 1). Figure 6-25 Left-side cover 3 Rotate the top of the cover away from the printer and lift the cover up to remove it. Reinstallation tip When reinstalling the left-side cover, make sure to hook the bottom of the cover first.
Front cover 1 Open the front cover. 2 Remove the tray 1 pins (callout 1) from the hinges on the front cover. Use your fingers to gently pry the paper-guide slide-pin hinges out of the hinge slots on the front cover to release the pins.
3 Slide the front cover toward the right side of the printer to remove it. Figure 6-27 Front cover (2 of 2) Reinstallation tip When you reinstall the front cover, the door-stop pin must be installed in the stop receptacle on the door so that the door opens and closes correctly.
Tray 1 1 Remove the front cover. See Front cover . 2 Open tray 1. 3 Firmly pull both sides of the tray 1 sensor-arm cover down to release it from the shaft. Figure 6-28 Tray 1 (1 of 3) Reinstallation tip After reinstalling the tray 1 sensor-arm cover, verify that the sensor arms move freely.
4 While holding the return-spring (callout 1), rotate the paper guide down to release the left paper- guide hinge (callout 2). Figure 6-29 Tray 1 (2 of 3) Hint Tape the return-spring in place on tray 1 so that you will not lose it.
5 Slide the paper guide to the left to remove it. Figure 6-30 Tray 1 (3 of 3) 202 6 Removing and replacing parts.
Rear output bin NOTE If the duplexer is installed, lift it up slightly and pull it away from the printer to remove it. 1 Open the rear output bin (callout 1).
Control-panel display The following sections describe removing and replacing parts of the control-panel display. Control-panel overlay 1 Use a small flat-blade screwdriver to carefully pry the top of the control-panel overlay away from the printer. Figure 6-32 Control-panel overlay 2 Lift the overlay off of the control panel.
Control-panel assembly CAUTION The product contains components that are sensitive to electrostatic discharge (ESD). Always perform service work at an ESD-protected workstation.
3 Remove four screws (callout 1), and then lift the control-panel cover (callout 2) out of the top cover. NOTE Some models have six screws. 2 1 Figure 6-33 Control-panel assembly (1 of 2) 206 6 Removi.
4 Remove the grounding-strip screw (callout 3) and the spacer (callout 4). Figure 6-34 Control-panel assembly (2 of 2) Control-panel display 207.
5 Unplug the control-panel wire-harness (callout 5), gently pry the front of the print-cartridge door away from the control-panel display to release the retainer clip, and then lift the control panel (callout 6) out of the top cover.
Main assemblies The following sections describe the removal and repair of internal printer components. Figure 6-35 Main assemblies 1 Duplexing pendulum assembly 6 Pickup-drive assembly 2 Laser/scanner.
Firmware DIMM (LJ 4200/4300 only) NOTE The HP LaserJet 4250/4350 Series printers do not use firmware DIMMs. Instead a firmware chip is soldered directly to the formatter in those printers.
Reinstallation tip The firmware DIMM must be installed in slot 1 (formatter PCA location J1; topmost slot). If you are installing additional DIMMs, the second DIMM must be installed in slot 2 (formatter location J2; second slot down from the top).
3 Slide the formatter assembly toward the rear of the printer to remove it. Figure 6-38 Formatter assembly (2 of 2) CAUTION Correct reinstallation of the formatter is critical to correct operation of the printer. If you are installing a new formatter, follow instructions in the reinstallation tips.
After installing a new formatter, complete the following steps: 1 Turn the printer on and then wait for five minutes after the printer reaches the Ready state. NOTE Five minutes is required to allow for NVRAM settings to be written. 2 Turn the printer off.
Output-delivery assembly 1 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door . ● Top cover.
3 Slide the shaft lock to the right and remove it to release the gear shaft from the output-delivery assembly (callout 2). CAUTION Do not break the shaft lock.
4 Lift up the gear end of the output-delivery assembly (callout 5) slightly and slide the assembly toward the formatter assembly to remove it. 3 4 5 Figure 6-40 Output delivery assembly (2 of 2) 216 6.
Duplexing-pendulum assembly NOTE The duplexing-pendulum assembly is part of the paper-path switching mechanism when the duplexer is installed. 1 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door .
3 Pull the duplexing-pendulum assembly toward the laser/scanner until the upper gear-drive shaft clears the hole in the chassis, and then remove the assembly.
Laser/scanner assembly 1 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door . ● Top cover.
4 Remove three screws (callout 3) and their grounding clips. 3 Figure 6-44 Laser/scanner (2 of 3) Reinstallation tip The grounding clips are not captive. Make sure that you replace the grounding clips when you reinstall the laser/scanner. NOTE The HP LaserJet 4200/4300 Series printers might have fewer than three grounding clips.
5 Remove a fourth screw (callout 4), and then unplug the laser/scanner wire-harness (callout 5) from the laser/scanner PCA. 5 4 Figure 6-45 Laser/scanner (3 of 3) 6 Carefully lift the laser/scanner up and out of the printer.
Paper-pickup drive assembly 1 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door . ● Top cover. See Top cover . ● Right-side cover. See Right-side cover . ● Formatter cover. See Formatter cover ● Formatter.
4 Lift up the power-switch connector-bar (callout 3) and swing it away from the paper-pickup gear assembly. Figure 6-47 Paper pickup-drive assembly (2 of 5) 5 Unplug the solenoid connector from the dc controller PCA (location J92). Unweave the solenoid wire-harness from the wire guide and the cable clips.
6 Remove one e-clip (callout 4) and the shaft collar (callout 5), and then push the tray drive-gear/ shaft (callout 6) into the tray 2 cavity. NOTE The large gear inside of the paper-pickup drive assembly is not captive and will slide off of the shaft and be loose inside the paper-pickup drive assembly (see Table 6-2 Tray 2 drive gear and shaft ).
8 Remove four screws (callout 7). Reach inside the printer and push the rear tray 2 feed roller up into its raised position (see Tray 2 feed rollers ).
Figure 6-50 Paper pickup-drive assembly (5 of 5) Reinstallation t i p When you reinstall the tray 2 drive gears and shaft, verify that the gears are seated on the shaft-locking bars and that the shaft collars are correctly positioned in the paper-pickup drive-gear assembly mounting bracket and printer chassis.
Tray 2 lifter-drive assembly 1 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door . ● Top cover. See Top cover . ● Right-side cover. See Right-side cover . ● Formatter cover. See Formatter cover ● Formatter.
3 Unhook the tension spring (callout 3) at the lifter-drive assembly, remove one screw (callout 4), and then slide the support plate (callout 5) out of the printer.
4 Rotate the top of the lifter-drive assembly away from the printer to remove it from the printer. NOTE You might have to remove some cable guides to easily remove the lifter-driver assembly.
Dc controller PCA 1 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door . ● Top cover. See Top cover . ● Right-side cover. See Right-side cover . ● Formatter cover. See Formatter cover ● Formatter.
3 Unweave the flat cables (callout 1) and all other cables (callout 2) from the cable guide (callout 3). 3 2 1 Figure 6-54 Dc controller PCA (1 of 5) Reinstallation tip When replacing the cables to the dc controller PCA, replace the wire cables first, and then replace the flat cables.
4 Remove the two screws (callout 4) that secure the formatter connector bracket to the chassis. Unweave the formatter connector wire-harness from the cable guides (callout 5). NOTE You might have to remove additional wire-harnesses from the wire guide to gain access to the formatter-connector harness.
5 Remove the flat cable (callout 7) from the flat-cable guide (callout 8). 7 8 Figure 6-57 Dc controller PCA (4 of 5) Main assemblies 233.
6 Remove two screws (callout 9) and then lift the dc controller PCA away from the printer. 9 Figure 6-58 Dc controller PCA (5 of 5) CAUTION Correct reinstallation of the dc controller is critical to correct operation of the printer. If you are installing a new dc controller, follow the instructions in the reinstallation tips.
Reinstallation tip Dc controller reinstallation for LJ 4250/4350 only 1 After installing a new dc controller, turn the printer on and wait for five minutes after the printer reaches the Ready state. NOTE Five minutes is required to allow for NVRAM settings to be written.
Power supply 1 Remove the following assemblies: ● Rear output bin. See Rear output bin . ● Rear accessory cover and tray 2 extension door. See Accessory covers and the tray 2 extension door . ● Top, right-side, and left-side covers. See Top cover through Left-side cover .
4 Remove the power-switch arm (callout 5). Figure 6-60 Power-supply assembly (2 of 7) Main assemblies 237.
5 Unplug the two power-supply flat cables and the dc controller power connector from the dc controller (locations J80, J81, and J99). Unweave the wire-harness and cables from the cable guide. Hint You might have to remove additional wire-harnesses from the cable guide to gain access to the power-supply harness.
6 Remove two screws (callout 6) and then remove the fan-cover plate (callout 7). 6 7 Figure 6-62 Power-supply assembly (4 of 7) Main assemblies 239.
7 Unplug the left-side fan and thermistor-sensor connectors on the power-supply PCA (callout 8), and then remove three screws (callout 9). 9 8 Figure 6-63 Power-supply assembly (5 of 7) 240 6 Removing.
8 Feed the two ribbon cables and the wire-harness through the hole in the right side of the chassis under the power-supply assembly. Pull down on the power-switch connector bar to slide it out of its mounting bracket, and remove it.
9 Grasp the power-supply assembly (callout 10) and lift it up slightly. Pull it straight out of the chassis. 10 Figure 6-65 Power-supply assembly (7 of 7) Reinstallation tip When you reinstall the power supply, thread the heavy-gauge wire- harness through the hole in the chassis first, and then thread the two ribbon cables through the hole.
Paper-feed belt assembly 1 Remove the power-supply assembly. See Power supply . 2 Remove three screws (callout 1) at the back of the assembly. 1 Figure 6-66 Paper-feed belt assembly (1 of 2) CAUTION Make sure that the four rubber belts and plastic rollers remain in place.
3 Release the paper-feed belt assembly alignment pins (callout 2). Rotate the assembly toward the back of the power supply and remove it. 2 Figure 6-67 Paper-feed belt assembly (2 of 2) Reinstallation.
Motors and fans This section provides instructions for removing and replacing motors and fans. Figure 6-68 Motors and fans FM101 Main fan FM103 Cooling fan (HP LaserJet 4250/4300/4350 only) M101 Main .
Main cooling fan (left side) 1 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door . ● Top cover. See Top cover . ● Left-side cover. See Left-side cover . 2 Remove two screws (callout 1), and then remove the power-supply shield (callout 2).
3 After removing the power-supply shield: ● Unplug two cables (callout 3). ● Remove one screw (callout 4). ● Slide the thermistor sensor bar (callout 5) to the right to release it, and then lift the thermistor sensor bar away from the printer. ● Release the two fan-locking tabs, and then slide the fan out of its mounting bracket.
Cooling fan, right side (HP LaserJet 4250/4300/4350 Series printers only) NOTE This fan is not installed in HP LaserJet 4200/4200L Series printers. To remove the fan from the air duct, complete the following steps. To remove the fan and the air duct together, see Removing the fan and the air duct together .
4 Unweave the cable from the cable guide (callout 3). Hint You might have to unplug connectors or release some wire-harness retainer clips to provide enough slack in the fan cable to remove it from the cable guide.
5 Release the two retaining tabs one at a time (callout 4) and pull the fan out of the duct bracket by rocking it from side to side until it comes free. 4 Figure 6-72 Cooling fan (HP LaserJet 4250/4300/4350 series only; 2 of 2) Reinstallation tip When you reinstall the fan, the air must flow into the printer.
Removing the fan and the air duct together 1 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door . ● Top cover. See Top cover . ● Right-side cover. See Right-side cover . ● Formatter cover.
6 Lift the fan duct (callout 5) while rotating the top of the fan duct away from the printer to remove it. 5 Figure 6-74 Cooling fan and air duct (HP LaserJet 4250/4300/4350 series only; 2 of 2) Reinstallation tip When you reinstall the fan, the air must flow into the printer.
Print-cartridge motor (HP LaserJet 4250/4300/4350 series printer only) NOTE This motor is not installed on the HP LaserJet 4200/4200L Series printers. 1 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door .
4 Support the motor (callout 4) while removing three screws (callout 5), and then lift the motor away from the printer. NOTE If the mechanism includes a toroid, remove the toroid from its retainer clip before removing the print-cartridge motor.
Main motor 1 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door . ● Top cover. See Top cover .
4 Support the main motor (callout 3) while removing three screws (callout 4), and then lift the motor away from the printer. 3 4 Figure 6-77 Main motor (2 of 2) 256 6 Removing and replacing parts.
Pickup and feed assemblies Tray 1 paper-pickup assembly 1 Remove the following assemblies: ● Rear accessory cover. See Accessory covers and the tray 2 extension door . ● Top cover. See Top cover . ● Right-side cover. See Right-side cover . ● Formatter cover.
4 Remove three screws (callout 4). 5 Press the upper retainer tab (callout 5) to release the assembly. 6 Lift up the cover to release the lower retaining tab and remove the cover.
7 Unplug the pickup-sensor connector (callout 6), and then remove six screws (callout 7).. 7 8 6 Figure 6-80 Tray 1 pickup assembly (3 of 4) Reinstallation tip One of the screws on the left side (callout 7 in Figure 6-80 Tray 1 pickup assembly (3 of 4) ) is longer than the other screws.
8 Rotate the left side of the assembly away from the chassis, and then slide the assembly to the left to remove it. Carefully feed the pickup- assembly-solenoid wire-harness through the opening in the chassis as you remove the assembly.
Paper-feed assembly 1 Remove the following assemblies: ● Tray 1. See Tray 1 . ● Tray 1 pickup assembly. See Tray 1 paper-pickup assembly . 2 Unplug the paper-feed assembly wire-harness connector from the dc controller PCA (location J89), and then unweave the wire-harness from the cable guide.
Reinstallation notes for the paper-feed assembly Make sure that the clutch tab on the right side of the paper-feed assembly is inserted into the hole in the plastic frame. Make sure that the wire-harnesses are fed through the hole in the plastic frame.
Main drive assembly 1 Remove the following assemblies: ● Top and right-side covers. See Top cover and Right-side cover . ● Right-side fan and fan duct (HP LaserJet 4250/4300/4350 Series printers only). See Cooling fan, right side (HP LaserJet 4250/4300/4350 Series printers only) .
3 Use a flat-blade screwdriver to release the flat-cable-guide tab (callout 2), and then slide the guide upward to remove it. Figure 6-86 Main drive assembly (2 of 3) 264 6 Removing and replacing part.
4 Use needle-nose pliers to release the lifting-assembly spring (callout 3), lift up the power switch rod and rotate it away from the chassis, and then remove five screws (callout 4). 3 4 Figure 6-87 Main drive assembly (3 of 3) 5 Grasp the main drive assembly and gently slide it straight away from the printer.
Registration assembly 1 Remove the following items: ● Main drive assembly. See Main drive assembly . ● Tray 1 paper-pickup assembly. See Tray 1 paper-pickup assembly . 2 Remove one e-clip retainer (callout 1), and then slide the registration-roller drive gear (callout 2) off of the shaft.
4 Use the green handle (located at the right edge of the registration plate) to raise the registration- roller plate, and then remove five screws (callout 4). NOTE Do not remove the screw shown in callout 5. Figure 6-89 Registration assembly (2 of 2) 5 Lift the registration assembly out of the printer.
Sensors and switches This section provides instructions for removing and replacing FRU sensors and switches. SW101 SW102 PS102 PS101 PS103 PS104 PS105 PS106 PS107 PS108 PS109 TH2 Figure 6-90 Sensors a.
Tray 2/500-sheet feeder media-size sensor (PS101) Tray 2 and the 500-sheet feeder each contain a media-size sensor. Tray 2 media-size sensor (PS101) 1 Remove the following assemblies: ● Top cover. See Top cover . ● Right-side cover. See Right-side cover .
500-sheet feeder media-size sensor 1 Remove the 500-sheet feeder right-side cover. See 500-sheet feeder right-side cover 2 Remove the 500-sheet feeder PCA. See 500-sheet feeder control PCA . 3 Remove two screws (callout 1). 4 Push the locking tab (callout 2) and slide the sensor toward the front of the feeder to release it.
5 Lift the sensor out of the 500-sheet feeder. Figure 6-93 500-sheet feeder media-size sensor (2 of 2) NOTE When you install the media-size sensor, verify that the locator pins are correctly positioned in the corresponding holes in the chassis.
Tray 1 paper sensor (PS105) 1 Remove the tray 1 pickup assembly. See Tray 1 paper-pickup assembly 2 Remove the grounding plate (callout 1). 3 Lift the tray 1 paper sensor (callout 2) away from the printer.
Door switch (SW101) 1 Remove the inner-front right cover according to the tray 1 paper-pickup assembly removal procedures. See Tray 1 paper-pickup assembly . 2 Release two tabs (callout 1) that secure the door switch (callout 2). 2 1 Figure 6-95 Door switch 3 Lift the door switch out of the cover.
Solenoids and clutches This section provides instructions for removing and replacing orderable solenoids and clutches. SL 101 Tray 2 pickup solenoid SL 102 Tray 1 pickup solenoid CL 101 Feed-roller cl.
Tray 2 pickup solenoid (SL101) 1 Remove the paper-pickup drive assembly. See Paper-pickup drive assembly 2 Remove one screw (callout 1) that secures the tray 2 pickup solenoid (callout 2) to the paper- pickup drive assembly. Figure 6-96 Tray 2 pickup solenoid 3 Lift tray 2 pickup solenoid off of the paper-pickup drive assembly.
Tray 1 pickup solenoid (SL102) 1 Remove the tray 1 paper-pickup assembly. See Tray 1 paper-pickup assembly 2 Remove one screw (callout 1) that secures the tray 1 pickup solenoid (callout 2) to the tray 1 paper-pickup assembly. Figure 6-97 Tray 1 pickup solenoid 3 Lift the tray 1 pickup solenoid off of the tray 1 paper-pickup assembly.
Feed-roller clutch (CL101) 1 Remove the paper-feed assembly. See Paper-feed assembly 2 Remove one e-ring (callout 1) and slide the gear (callout 2) off of the shaft.
Accessories The following sections describe the printer accessories. 500-sheet feeder assembly The following sections describe the parts of the 500-sheet feeder assembly. 500-sheet feed rollers NOTE The removal procedure for the two feed rollers in the 500-sheet feeder is the same as the procedure for the tray 2 feed rollers.
2 Use a flat-blade screwdriver to release the right-side cover front locking tab. Figure 6-100 500-sheet feeder right-side cover (2 of 5) 3 Depress the edge of the cover and release the three center locking tabs.
4 Use flat-blade screwdriver to release the rear locking tab. Figure 6-102 500-sheet feeder right-side cover (4 of 5) 5 Rotate the top of the cover away from the tray assembly and lift it up to remove it.
500-sheet feeder control PCA CAUTION The product contains components that are sensitive to electrostatic discharge (ESD). Always perform service work at an ESD-protected workstation. If an ESD-protected workstation is not available, discharge body static by grasping the 500-sheet feeder chassis before touching an ESD-sensitive component.
500-sheet feeder lifter-drive assembly 1 Remove the 500-sheet feeder right-side cover. See 500-sheet feeder right-side cover . 2 Unplug the lifter-drive harness connector from the assembly PCA (location J803; callout 1). Disconnect the tension spring (callout 2) and remove one screw (callout 3).
500-sheet feeder paper-pickup drive assembly 1 Remove the following assemblies: ● 500-sheet feeder right-side cover. See 500-sheet feeder right-side cover . ● 500-sheet feeder tray lifter-drive assembly. See 500-sheet feeder lifter-drive assembly .
3 Remove two screws (callout 3). Remove the tray-number indicator. 3 Figure 6-108 500-sheet feeder paper-pickup drive assembly (2 of 7) 4 Unplug the accessory -connector wire-harness from the PCA (callout 4).
5 Remove 8 screws (callouts 5, 6, and 7). Remove the chassis gutter (callout 8). 7 5 8 6 Figure 6-110 500-sheet feeder paper-pickup drive assembly (4 of 7) 6 Remove one e-clip and the shaft collar (callout 9).
7 Push the shaft into the paper-pickup drive assembly. Grasp the tray drive gear inside the tray cavity and pull the gear and shaft assembly out of the paper-pickup gear assembly. Figure 6-112 500-sheet feeder paper-pickup drive assembly (6 of 7) CAUTION Some gears are not captive when the paper-pickup assembly is removed.
8 Remove five screws (callout 10). Pull the paper-pickup gear assembly away from the chassis and remove it. 10 Figure 6-113 500-sheet feeder paper-pickup drive assembly (7 of 7) NOTE When you install .
1,500-sheet feeder assembly The following sections describe the parts of the 1,500-sheet feeder assembly. 1,500-sheet feeder feed rollers NOTE The removal procedure for the two feed rollers in the 1,500-sheet feeder is the same as the procedure for the tray 2 feed rollers.
2 Pinch the blue latch that is on the side of the feed roller and slide the roller off of the shaft. 2 1 Figure 6-116 1,500-sheet feeder roller (2 of 2) Reinstallation tip This roller must lock into place.
1,500-sheet feeder door 1 Remove one screw (callout 1) and remove the door-stop plate (callout 2). 2 1 Figure 6-117 1,500-sheet feeder door (1 of 3) 2 Open the 1,500-sheet feeder door about halfway. Gently pry open the door slide-bar slot and disengage the door slide-bar from the feeder.
3 Lift the door straight up and off of the door hinge pins. 3 Figure 6-119 1,500-sheet feeder door (3 of 3) NOTE The door hinge pins are not captive when the door is removed. If the feeder must be turned on its side or placed upside down, remove the hinge pins and the door spring (callout 2).
2 Rotate the top of the cover away from the feeder. Lift up on the cover to release it. Figure 6-121 1,500-sheet feeder rear cover (2 of 2) 1,500-sheet feeder right-side cover 1 Remove the following assemblies: ● Door. See 1,500-sheet feeder door . ● Rear cover.
3 Use a flat-blade screwdriver to release the cover-locking tab (on the door-hinge side; callout 2). 2 Figure 6-123 1,500-sheet feeder right-side cover (2 of 3) 4 Rotate the top of the cover away from the chassis and then lift it up and remove it.
1,500-sheet feeder control PCA 1 Remove the following assemblies: ● Door. See 1,500-sheet feeder door . ● Rear and right-side covers. See 1,500-sheet feeder rear cover and 1,500-sheet feeder right- side cover . 2 Unplug six wire-harness connectors (callout 1).
3 Remove two screws (callout 2). Use needle-nose pliers to squeeze the top of one of the nylon PCA tabs (callout 3). Gently pop the PCA off of the tab.
1,500-sheet feeder media-size sensor 1 Remove the following assemblies: ● Door. See 1,500-sheet feeder door . ● Rear and right-side covers. See 1,500-sheet feeder rear cover and 1,500-sheet feeder right- side cover . 2 Unplug the sensor wire-harness at the sensor (callout 1).
1,500-sheet feeder lifter-drive assembly 1 Remove the following assemblies: ● Door. See 1,500-sheet feeder door . ● Rear and right-side covers. See 1,500-sheet feeder rear cover and 1,500-sheet feeder right- side cover . 2 Unplug the lifter-drive harness connector from the PCA (location J1003; callout 1).
4 Remove seven screws (callout 4) and then remove the bracket (callout 5). Slide the spring-gear assembly (callout 6) away from the chassis until the gear shaft clears the hole in the chassis, and then slide the assembly towards the rear of the feeder to remove it.
6 Slide the lifter-drive assembly away from the chassis until the lifter-drive gear-shaft clears the corresponding hole in the bracket. Remove the assembly.
1,500-sheet feeder paper-pickup drive assembly 1 Remove the following assemblies: ● Door. See 1,500-sheet feeder door . ● Rear and right-side covers. See 1,500-sheet feeder rear cover and 1,500-sheet feeder right- side cover . 2 Unplug the paper-pickup drive-solenoid harness connector from the assembly PCA (location J1005; callout 1).
7 Troubleshooting Chapter contents ● Introduction ● Troubleshooting process ● Troubleshooting tools ● Control-panel menus ● Printer resets and power-on modes ● Test pages ● Interface tro.
Introduction In order to use the information in this chapter, you should have a basic understanding of the laserjet printing process. Explanations of each mechanical assembly, the printer systems, and the basic theory of operation are contained in chapter 5 of this manual.
Troubleshooting process When the printer malfunctions or encounters an unexpected situation, information on the printer control panel alerts you to the situation. This section contains an initial troubleshooting checklist that helps to eliminate many possible causes of the problem.
■ Is the media stored correctly and within environmental limits? ■ Is the correct side of the page printed on first? ■ Is long-grain paper being used? Input trays ■ Is the correct amount of me.
Troubleshooting flowchart The flowchart highlights the general processes that you can use to isolate and solve printer hardware problems quickly. Each heading depicts a major troubleshooting step. Proceed to the next major step or perform additional testing depending on "yes" or "no" answers.
Power-on checks The basic printer functions should start up as soon as the printer is plugged into an electrical receptacle and the power switch is pushed to the on position.
NOTE It is important to have the printer control panel functional as soon as possible in the troubleshooting process so that the control-panel display can be used to help locate printer errors. If problems with the power-on check perisist refer to table Table 7-2 Power-on defect or blank display .
Problem Ac ti o n 3 Replace the power-supply assembly. See Power supply . 4 Replace the dc controller. See Dc controller PCA . Note: The fan only operates during the initial startup and while printing, and when the temperature inside the printer is too high.
Troubleshooting tools Press ( S ELECT button) or the M ENU button to open the menus. Use ( U P A RROW button) or ( D OWN A RROW button) to scroll through the menus that appear.
Information pages 1 Press ( S ELECT button) or the M ENU button to open the menus. 2 Press ( D OWN A RROW button) to scroll to INFORMATION . 3 Press to select INFORMATION .
Menu map Use the menu map to help navigate the printer submenus and select configuration settings. Printing a menu map is very helpful when you are changing numerous printer settings. 1 Press ( S ELECT button) or the M ENU button to open the menus. 2 Use ( U P A RROW button) or ( D OWN A RROW button) to scroll to INFORMATION , and then press .
Configuration page Use the configuration page to view current printer settings, to help troubleshoot printer problems, or to verify installation of optional accessories, such as memory (DIMMs), trays, and printer languages. The content of the configuration page varies, depending on the options currently installed in the printer.
4 Memory Lists the printer memory and I/O buffering and resource saving information 5 Security Lists the status of the control-panel lock, control-panel password, and any disk drives 6 Paper trays and.
Supplies status page Use the supplies status page to obtain information about the print cartridge that is installed in the printer, the amount of life left in the print cartridge, and the number of pages and jobs that have been processed. The page also lets you know when you should perform the next preventive maintenance.
Embedded Web server When the printer is directly connected to a computer, the embedded Web server is supported for Windows 95 and later. In order to use the embedded Web server with a direct connection, you must select the Custom installation option when you install the printer driver.
■ Supplies Status . Shows the life that remains in HP supplies (0% represents that a supply is empty). This page also provides supplies part numbers. To order new supplies, click Order Supplies in the Other Links area on the left side of the window.
Other links This section of the embedded Web server contains links that connect you to the Internet. You must have Internet access in order to use any of these links. If you use a dial-up connection and did not connect when you first opened the embedded Web server, you must connect before you can visit these Web sites.
To select status messages 1 Open Printer Status and Alerts in one of these ways: ● Double-click the Printer Status and Alerts tray icon, which is near the clock in the Tray Manager. ● On the Start menu, click Programs , click Printer Status and Alerts , and then click Printer Status and Alerts .
Control-panel menus Use the control-panel menus to control various printer functions. For example, you can use the RESETS submenu to quickly reset and restore most of the factory default printer settings. Not all of the available menus are described in this manual.
Resets submenu To find the RESETS submenu, use the control panel to open the CONFIGURE DEVICE menu (see Using the control panel . Items on the Resets submenu are used to return settings to the defaults and to change settings such as PowerSave/Sleep . The following section lists the settings and their possible values in the RESETS submenu.
Diagnostics menu Administrators can use this menu to isolate parts and to troubleshoot jam and print-quality issues. The following section lists the settings and their possible values in the DIAGNOSTICS menu. The default value for each setting is the one that has an asterisk (*) next to it.
Item Values Explanation ■ DUPLEX ■ * OFF ■ ON Determine whether or not the paper goes through the duplexer during the paper path test. This item is available only if the duplexer is installed. ■ COPIES ■ * 1 ■ 10 ■ 50 ■ 100 ■ 500 Set how many sheets of paper are used from each tray during the paper- path test.
Service menu (service PIN codes) Authorized HP service technicians can use this menu to gain access to printer settings that are reserved for service personnel. The service menu is protected by use of a personal identification number (PIN). When you select SERVICE from the list of menus, you are prompted to type an eight- digit PIN code.
Service ID When printing from an HP LaserJet 4200 and 4300 Series printer this information appears on the configuration page (see Configuration page ), which eliminates the need for customers to keep paper receipts for proof of the warranty.
Printer resets and power-on modes The following sections describe the types of printer resets and power-on modes. Cold reset A cold reset unlocks menus that have been previously locked and returns all of the control panel menu items (including EIO settings) to the factory defaults.
NVRAM initialization CAUTION Initializing the NVRAM resets the serial number, the event log, the page counts, the EIO card, and the embedded print server. Initializing the NVRAM also resets service-menu values to factory defaults. Use the service menu to restore the serial number and page counts.
Hard-disk initialization CAUTION A hard-disk initialization erases and reformats the printer hard disk. Perform a hard-disk initialization only if an error code on the control panel indicates an EIO disk error. Always try initializing the hard disk before replacing it.
Power-on bypass When the power is turned on the printer begins the power-on sequence. By performing a power-on bypass, you can cause the printer to resume the power-on sequence but not to recognize any installed EIO hard disk (skip-disk load procedure).
Test pages Printing test pages helps you determine whether or not the printer engine and the formatter are functioning. Engine-test page To verify that the printer engine (all printer components except the formatter, formatter DIMMs, EIO products, and the stacker or stapler/stacker) is functioning, print an engine-test page.
Formatter test page To verify that the formatter is functioning, print a configuration. 1 Press ( S ELECT button) or the M ENU button to open the menus. 2 Press ( D OWN A RROW button) to scroll to INFORMATION . 3 Press to select INFORMATION . 4 Press to scroll to PRINT CONFIGURATION .
Interface troubleshooting The following sections provide instructions for interface troubleshooting. Communications checks NOTE Communication problems are normally the customer's responsibility. Time spent attempting to resolve these problems might not be covered by the Hewlett-Packard product warranty.
Jetdirect page/Embedded Jetdirect page (HP LaserJet 4250/4350 Series printers) hp La serJet 4 25 0/43 50 seri es 1 2 5 7 3 4 6 8 1 Figure 7-6 Jetdirect page/Embedded Jetdirect page (HP LaserJet 4250/4.
Display-message troubleshooting The following tables explain the messages that might appear on the control-panel display or in the event log. Alphabetical printer messages and their meanings are listed in Alphabetical printer messages , and numerical printer messages are listed in Numerical printer messages .
Alphabetical printer messages Table 7-6 Alphabetical printer messages Control panel message Description Recommended action Access denied MENUS LOCKED An attempt has been made to modify a printer menu item, but the network systems administrator has enabled the control-panel security mechanism.
Control panel message Description Recommended action CHOSEN PERSONALITY NO T AVAI LAB LE For help press alternates with CHOSEN PERSONALITY NO T AVAI LAB LE To continue press The printer job language (PJL) encountered a request for a personality that did not exist in the printer.
Control panel message Description Recommended action alternates with Ready For menus press DISK FILE SYSTEM IS FULL alternates with Ready For menus press The printer received a PJL file system command that attempted to store something on the file system.
Control panel message Description Recommended action FLASH FILE OPERATION FAILED alternates with Ready For menus press The printer received a PJL file system command that attempted to perform an illogical operation (for example, a command to download a file to a non-existent directory).
Control panel message Description Recommended action 5 If the tray settings on the configuration page are correct, verify that the tray paper-out sensor is operating. See Printer switches and sensors , 500- sheet feeder switches, sensors, solenoids, and PCAs or 1,500-sheet feeder switches, sensors, solenoids, and PCAs .
Control panel message Description Recommended action LOAD TRAY XX <TYPE> <SIZE> For help press alternates with LOAD TRAY XX <TYPE> <SIZE> To use another tray press Tray XX is either empty (based on the operation of the paper sensor) or configured for a type and size other than that specified in the job.
Control panel message Description Recommended action MANUALLY FEED <TYPE> <SIZE> To continue press configuration page (see Configuration page ) to see if the printer tray setting differs from the paper size and type in the tray.
Control panel message Description Recommended action NOTE Printer repairs that are required as a result of using non- HP print cartridges are not covered under the HP warranty. OUTPUT BIN 1 FULL Remove all paper from bin NOTE: The stacker or stapler/stacker LED blinks in amber.
Control panel message Description Recommended action RAM DISK FILE OPERATION FAILED alternates with Ready For menus press The printer received a PJL file system command that attempted to perform an illogical operation (for example, a command to download a file to a nonexistent directory).
Control panel message Description Recommended action 3 Press ( U P A RROW button) and ( D OW N A RROW button) to step through the instructions. 4 Supplies-ordering information is also available from the embedded Web server. 5 If this error persists, replace the power- supply assembly.
Control panel message Description Recommended action STAPLER LOW ON STAPLES For help press NOTE: The stapler/stacker LED is continuously illuminated green (this error applies to the stapler/stacker only). Fewer than 70 staples remain in the optional stapler/stacker staple cartridge.
Control panel message Description Recommended action TRAY XX EMPTY <TYPE> <SIZE> alternates with Ready For help press The specified tray is empty, but the current job does not require this tray in order to print correctly. 1 Refill the indicated tray.
Control panel message Description Recommended action TRAY XX <TYPE> <SIZE> To change type press alternates with TRAY XX <TYPE> <SIZE> Size detected by tray The printer is reporting the current configuration of tray XX. The tray switch is in the Standard position.
Control panel message Description Recommended action Unable to store job <JOBNAME> A job cannot be stored because of a memory, disk, or configuration problem. 1 Install additional memory in the printer, or install a disk drive in the printer. See Firmware DIMM (LJ 4200/4300 only) .
Numerical printer messages When resolving printer messages, perform all listed actions in the order until the message is resolved. Numerical printer messages Table 7-7 Numerical printer messages Control panel message Description Recommended action 10.
Control panel message Description Recommended action the print cartridge opens as you insert the cartridge. Replace any defective print cartridge. 4 For information about how to resolve a jam, see the specific numerical error codes in this table. 5 See Paper-path troubleshooting in this chapter.
Control panel message Description Recommended action NOTE The 13.01.00 error can also be caused by the failure of the paper-level sensor (PS107). If this sensor fails, the lifter motor does not rotate to lift the paper tray plate.
Control panel message Description Recommended action verify that the sensor arms move freely. (See Printer switches and sensors .) 4 Check the inside of the duplexer for scraps of media that might have torn off when a jam was cleared. 5 Replace the media-size sensor (PS106) and fuser.
Control panel message Description Recommended action 3 Remove all of the pages from the output bin. 4 Open the jam-access door and remove all of the pages. Close the access door. 5 If this error message persists, replace the stapler/stacker. 13.12.09 jam in output device For help press NOTE: The stacker or stapler/stacker LED blinks in amber.
Control panel message Description Recommended action 13.13.00 JAM INSIDE DUPLEXER For help press A page is jammed inside of the duplexer. 1 Press ( H ELP button) for detailed information about clearing the jam. 2 Press ( U P A RROW button) and ( D OW N A RROW button) to step through the instructions.
Control panel message Description Recommended action 21 PAGE TOO COMPLEX For help press alternates with 21 PAGE TOO COMPLEX To continue press The printer cannot process the page quickly enough. 1 Press ( S ELECT button) to process the page. NOTE A loss of data will occur.
Control panel message Description Recommended action 41.3 UNEXPECTED SIZE IN TRAY XX For help press alternates with 41.3 UNEXPECTED SIZE IN TRAY XX: [TYPE] [SIZE] For help press The media that is loaded is longer or shorter in the feed direction than the size that is configured for the tray.
Control panel message Description Recommended action appears only with a certain software program or print job, contact the software vendor for assistance. 5 If the message persists when using different software programs and attempting specific print jobs, disconnect all cables that connect the printer to the network or a computer.
Control panel message Description Recommended action 50.X FUSER ERROR For help press A fuser error has occurred. X Description 1 low fuser temperature 2 fuser warmup service 3 fuser over temperature 4 faulty fuser 5 incorrect fuser is installed 6 open fuser circuit 1 Turn the printer off and allow it to cool down.
Control panel message Description Recommended action Y Device Location 1 DIMM Slot 1 2 DIMM Slot 2 3 DIMM Slot 3 4 DIMM Slot 4 ZZ Error Number 0 unsupported memory 1 unrecognized memory 2 unsupported memory size 3 failed RAM test 4 exceeded maximum RAM size 6 invalid DIMM speed 54.
Control panel message Description Recommended action PRINTER ERROR To continue turn off then on or 57.3 EP fan failure or 57.4 main fan failure X Description 3 Cooling fan, right side (LJ 4250/4300/4350 only) 4 Main cooling fan, left side 57.
Control panel message Description Recommended action 59.XY PRINTER ERROR For help press alternates with 59.XY PRINTER ERROR To continue turn off then on A printer-motor error has occurred.
Control panel message Description Recommended action 60.2 printer error The tray 2 lifter-motor is not functioning. 1 Turn the printer off and then on. 2 If the error persists, turn the printer off. 3 Verify that the tray 2 lifter wire-harness is full seated in its connector on the dc controller PCA (location J93).
Control panel message Description Recommended action 4 Replace the formatter assembly. See Formatter assembly . 64 PRINTER ERROR For help press alternates with 64 PRINTER ERROR To continue turn off then on A scan-buffer error has occurred. 1 Turn the printer off and then on.
Control panel message Description Recommended action PERMANENT STORAGE ERROR To continue press 0 onboard NVRAM 1 flash DIMM or hard drive 5 Replace the formatter assembly. See Formatter assembly . 68.X PERMANENT STORAGE FULL For help press alternates with 68.
Control panel message Description Recommended action To continue turn off then on 3 Reseat the formatter. 4 Go to www.hp.com/go/lj4200_software , www.hp.com/go/lj4250_software , www.hp.com/go/lj4300_software , or www.hp.com/go/lj4350_software . Select Download Drivers and Software .
Paper-path troubleshooting The following sections describe how to troubleshoot problems in the paper path. Overview If a jam message appears on the printer control-panel display, look for jammed paper or other print media in the locations that are indicated in the following figure.
Jam recovery This printer can automatically provide jam recovery. You can use the jam-recovery to automatically reprint jammed pages. Select whether or not you want the printer to attempt to reprint jammed pages. ■ AUTO Printer will attempt to reprint jammed pages.
Avoiding jams Use this table to help avoid specific types of jams. Table 7-8 Common causes of paper jams Cause Solution The print media does not meet HP recommended media storage and use specifications. Use only media that meets HP specifications. See chapter 1 in this manual or the HP print media guide (available at http:/ /www.
Persistent jams If jams occur repeatedly, use the information in this section to diagnose the root cause of the problem. The tables in this section list possible causes and recommended solutions for jams in each area of the paper path. The information is listed in the order in which you conduct the investigation.
■ Try printing from all of the available input trays and to all of the available output bins to identify whether the problem is isolated to one tray. ■ Print the job in both the simplex and duplex mode to identify whether the problem occurs only in one mode or the other.
To isolate a jam, you can specify which input tray to use, which output bin to use, whether to use the duplex path, and the number of pages to print. Printing multiple pages helps to isolate intermittent jam problems. The following options are available for this test.
Jams in tray 1 Table 7-9 Causes of tray 1 jams Cause Solution The pickup roller is dirty, worn, or damaged. Clean the pickup roller. If it is dirty after cleaning, or if it is worn or damaged, replace the pickup roller. The separation pad is dirty, worn, or damaged.
Jams in tray 2 Table 7-10 Causes of tray 2 jams Cause Solution The feed or separation rollers are dirty, worn, or damaged. Clean the rollers. If they are dirty after cleaning, or if they are worn or damaged, replace the rollers. The pickup roller is worn or damaged.
Jams in tray 3 or tray 4 Table 7-11 Causes of tray 3 and or tray 4 jams Cause Solution The feed or separation rollers are dirty, worn, or damaged. Clean the rollers. If they are dirty after cleaning, or if they are worn or damaged, replace the rollers.
Jams in the paper path NOTE Avoid using odd-sized media. Odd-sized media might not travel between the transfer roller and the fuser without getting jammed. Avoid using short-grain paper. Short-grain paper might curl excessively and become jammed. This type of jam is often found between the fuser and the output destination or in the duplexer.
Media transport problems If media is feeding incorrectly, use the information in this section to identify and resolve the problem. Multiple pages feed Table 7-14 Causes for multiple pages feeding Cause Solution The tray 1 separation pad is worn. Replace the separation-pad assembly.
Media is skewed Table 7-17 Causes for skewed media Cause Solution Paper dust or dirt has accumulated on the tray feed roller or separation roller. Clean or replace the rollers. The tray feed roller and separation roller are worn irregularly. Replace the affected roller.
Image-formation troubleshooting The image-formation system is the central hub of the printer. During image formation, an image is formed with toner and then fused onto the paper.
Overhead transparency defects Overhead transparencies can show any of the image-quality problems that appear in other types of media in addition to defects that are specific to transparencies. Also, because transparencies are pliable, they can be affected by the media-handling components in the paper path.
Image defects This section helps you define print-quality problems and solutions. Often, print-quality problems can be resolved by making sure that the printer is correctly maintained, using print media that meets HP specifications, or running a cleaning page.
Check the print cartridge Image-formation defects are often the result of problems with the print cartridge. If you suspect that the print cartridge is the source of the problem, replace the print cartridge before troubleshooting image defects. Use the following list to make sure that the print cartridge is still operable.
Half self-test functional check The electrophotographic process can be subdivided into the following stages: ■ Cleaning (removes excess toner from the drum surface) ■ Conditioning (places a unifor.
Image defect tables Compare a printed sample of the image quality to these defect tables in order to determine a remedy. Table 7-19 Print-quality image defects See Table 7-20 Light print (partial page) . See Table 7-21 Light print (entire page) . See Table 7-22 Specks or dots .
See Table 7-32 White lines . A A A A A B B B B B C C C C C a a a a a c c c c c b b b b b See Table 7-33 Smudged lines (either direction) . See Table 7-34 White spots on black . See Table 7-35 Scattered lines . See Table 7-36 Blurred print . See Table 7-37 Black page .
Table 7-21 Light print (entire page) Possible cause Recommended action Begin by performing the half self-test functional check (see Half self-test functional check ). If the image on the print drum is light, proceed with actions 1, 2, 3, 6, and 7. If the drum image is normal, proceed with actions 5, 6, and 8.
Table 7-22 Specks or dots Possible cause Recommended action NOTE Specks might appear onthe page after a jam has been cleared. Print two or three more pages and see if the specks diappear. Specks The interior of the printer is dirty. 1 Print a few more pages and see if the problem corrects itself.
Table 7-23 Drop outs and character voids Possible cause Recommended action(s) The user is printing on the wrong side of the paper. The label on the ream of paper indicates which side to print on. The different surface properties of some papers might cause problems if the paper is loaded incorrectly.
Possible cause Recommended action(s) (Continued) The fuser setting is incorrect for the media type. Open the configure-device menu at the control panel and change the fuser- mode setting or select another media type. See Configure-device menu . The transfer roller is damaged, has finger oils on its surface, or is dirty or worn.
Possible cause Recommended action(s) A A A A A B B B B B C C C C C a a a a a c c c c c b b b b b (Continued) Horizontal lines (parallel to the paper-path direction) If the lines are repeated at a consistent interval down the page, a repetitive defect exists.
Possible cause Recommended action(s) The customer is printing on the envelope seams. (Printing on an envelope seam can cause a background-scatter problem.) Move the text to an area that has no seams. The toner-density setting is wrong. Open the print-quality menu at the control panel and adjust the toner- density setting.
Possible cause Recommended action(s) The fuser is defective. The print will smear if the fuser does not heat sufficiently to bond the toner to the paper. Replace the fuser. See Fuser . The dc controller PCA is defective. The dc controller PCA regulates the fuser roller temperature.
Table 7-28 Distorted images Possible cause Recommended action(s) AaBbCc AaBbCc AaBbCc AaBbCc AaBbCc AaBbCc The media does not meet specifications or is not stored correctly. 1 Turn over the stack of media in the tray. Also try rotating the media 180°.
Possible cause Recommended action(s) The media is not loaded correctly or the trays are not adjusted correctly. Make sure that the media is loaded correctly and that the guides fit snugly against the stack. The registration assembly is not installed correctly or is damaged.
Table 7-30 Curl or wave Possible cause Recommended action(s) The media does not meet specifications or is not stored correctly. 1 Turn over the stack of media in the tray.
Table 7-31 Creases Possible cause Recommended action(s) The media does not meet specifications or is not stored correctly. 1 Turn over the stack of media in the tray.
Possible cause Recommended action(s) The fuser roller is damaged. ■ Process a printer cleaning page. See Running the cleaning page manually . ■ If the problem persists, replace the fuser. See Fuser . The laser beam or beam circuitry is unstable. 1 Check the cables between the dc controller and the laser/scanner assembly.
Table 7-33 Smudged lines (either direction) Possible cause Recommended action(s) A A A A A B B B B B C C C C C a a a a a c c c c c b b b b b The paper path is contaminated or damaged. 1 Perform the half self-test functional check. See Half self-test functional check .
Table 7-35 Scattered lines Possible cause Recommended action(s) The media does not meet specifications or is not stored correctly. 1 Turn over the stack of media in the tray.
Possible cause Recommended action(s) The high-transfer setting is turned off. Open the print-quality menu at the control panel (see Print-quality submenu ). Select OPTIMIZE and set HIGH TRANSFER=ON . The line-detail setting is turned off. Open the print-quality menu at the control panel (see Print-quality submenu ).
Table 7-38 Blank page Possible cause Recommended action(s) The software configuration is incorrect (intermittent problem). Make sure that the software program is not sending incorrect page-length requests or extra page-eject commands. The network configuration is incorrect.
Table 7-39 Dark print Possible cause Recommended action(s) The toner-density setting is incorrect. Open the print-quality menu at the control panel and adjust the toner- density setting. See Print-quality submenu . The print cartridge drum is close to the end of its expected life.
Roller Distance between defects Replacement part Photosensitive drum 94.2 mm (3.75 inches) Print cartridge *The developer-roller circumference is 62.8 mm (2.5 inches). A defect that is related to the developing roller will most likely repeat at intervals of 54.
Troubleshooting the stacker and the stapler/stacker When troubleshooting problems are related to the stacker or stapler/stacker, you might find that it is difficult to distinguish whether the malfunction relates to the stacker, the stapler/stacker, or the printer.
Jam errors The following sections describe stacker and stapler/stacker jam errors. Stacker and stapler/stacker paper path Figure 7-9 Stacker and stapler/stacker paper path Troubleshooting the stacker .
Stacker paper-path test Use the following procedure to perform a stacker paper-path test. 1 Press ( S ELECT button) or the M ENU button to open the menus. 2 Use ( U P A RROW button) or ( D OWN A RROW button) to scroll to DIAGNOSTICS , and then press .
Possible cause Recommended action(s) The inlet-sensor (PS1101) arm cannot move freely or is damaged. Inspect the inlet sensor (PS1101). See Stacker and stapler/ stacker switches and sensors . Verify that the sensor arm can move freely. If necessary, replace the stacker or stapler/ stacker.
Paper-transport errors Table 7-43 Paper-transport-error troubleshooting Possible cause Recommended action(s) The rollers are worn, dirty, or defective. Inspect all of the stacker or stapler/stacker rollers. Clean any dirty rollers. If necessary, replace the stacker or stapler/ stacker.
Component errors NOTE When component errors occur, a control-panel message appears on the control- panel display. For more information about these messages, see Alphabetical printer messages and Numerical printer messages .
Possible cause Recommended action(s) The OUTPUT PAPER PATH OPEN message appears on the control-panel display, but the jam access and stapler unit doors are closed. ■ The door-open switch (SW1101) is damaged or defective. See Stacker and stapler/stacker switches and sensors .
Printer-component locations The following sections describe the printer-component locations. Main printer parts 1 3 2 4 5 6 Figure 7-10 Location of the main printer parts (1 of 4) 1 Feed roller assemb.
1 3 2 4 Figure 7-11 Location of the main printer parts (2 of 4) 1 Registration assembly 2 Delivery assembly 3 Fuser assembly 4 Tray 1 pickup assembly 410 7 Troubleshooting.
3 2 1 Figure 7-12 Location of the main printer parts (3 of 4) 1 Transfer roller 2 Tray 1 pickup roller 3 Separation pad Printer-component locations 411.
1 3 2 Figure 7-13 Location of the main printer parts (4 of 4) 1 Pickup roller 2 Feed roller 3 Separation roller (in the tray) 412 7 Troubleshooting.
Printer switches and sensors SW101 SW102 PS102 PS101 PS103 PS104 PS105 PS106 PS107 PS108 PS109 TH2 Figure 7-14 Location of the printer switches and sensors SW101 Top-cover-open switch SW102 Paper-size.
Printer motors and fans 1 3 2 4 5 Figure 7-15 Location of the printer motors and fans 1 Main cooling fan 2 Main drive motor 3 Right-side cooling fan (HP LaserJet 4250/4300/4350 only) 4 Print-cartridge.
Printer PCAs 1 2 Figure 7-16 Location of the printer PCAs 1 Power-supply assembly (high-voltage and low-voltage circuits) 2 Dc controller PCA Printer-component locations 415.
Accessory component locations The following sections describe the component locations within the printer accessories. 500-sheet feeder main parts 4 5 1 3 2 Figure 7-17 Location of the 500-sheet paper-.
500-sheet feeder switches, sensors, solenoids, and PCAs 1 3 2 4 5 Figure 7-18 Location of the 500-sheet paper feeder switches, sensors, solenoids, and PCAs 1 500-sheet feeder paper-size switch (SW801).
1,500-sheet feeder main parts 1 2 Figure 7-19 Location of the 1,500-sheet paper feeder main parts (1 of 2) 1 1,500-sheet feeder lifter-drive assembly 2 1,500-sheet feeder pickup-gear assembly 418 7 Tr.
1 3 2 Figure 7-20 Location of the 1,500-sheet paper feeder main parts (2 of 2) 1 1,500-sheet feeder feed roller 2 1,500-sheet feeder pickup roller 3 1,500-sheet feeder separation roller (in the door) .
1,500-sheet feeder switches, sensors, solenoids, and PCAs 1 3 2 4 5 6 Figure 7-21 Location of the 1,500-sheet switches, sensors, solenoids, and PCAs 1 1,500-sheet feeder paper-stack-position sensor (S.
Stapler/stacker stapler assembly 1 Figure 7-22 Location of the stapler/stacker stapler unit 1 Stapler unit (stapler/stacker accessory only) Accessory component locations 421.
Stacker and stapler/stacker switches and sensors 1 3 2 4 5 6 7 Figure 7-23 Location of the stacker and stapler/stacker switches and sensors 1 Delivery-roller disengaging sensor (stapler/stacker only; .
Stacker and stapler/stacker motors and solenoids 1 3 2 4 5 Figure 7-24 Location of the stacker and stapler/stacker motors and solenoids 1 Deflector solenoid (SL1101) 2 Paddle mechanism and motor (stap.
Stacker and stapler/stacker PCAs 1 2 Figure 7-25 Location of the stacker and stapler/stacker PCAs 1 Stacker or stapler/stacker driver PCA 2 Stacker or stapler/stacker LED PCA 424 7 Troubleshooting.
Printer and accessory wiring diagrams The following sections contain wiring diagrams for the printer and its accessories. Printer and accessory wiring diagrams 425.
HP LaserJet 4200 wiring diagram Figure 7-26 HP LaserJet 4200 wiring diagram 426 7 Troubleshooting.
HP LaserJet 4250 wiring diagram 1 2 3 1 2 3 Multi-purpose tray paper sensor Stacker or Staple stacker Paper stack surface sensor Paper f eeder or Paper deck Envelope f eeder 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 24R 24R 24R /MMFG /MMDEC /MMACC GND GND GND 9 8 7 6 5 4 3 2 1 9 8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1 GND 3.
HP LaserJet 4300 wiring diagram Figure 7-28 HP LaserJet 4300 wiring diagram 428 7 Troubleshooting.
HP LaserJet 4350 wiring diagram 1 2 3 1 2 3 Multi-purpose tray paper sensor Stacker or Staple stacker Paper stack surface sensor Paper f eeder or Paper deck Envelope f eeder 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 24R 24R 24R /MMFG /MMDEC /MMACC GND GND GND 9 8 7 6 5 4 3 2 1 9 8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1 GND 3.
500-sheet feeder wiring diagram Figure 7-30 500-sheet feeder wiring diagram 430 7 Troubleshooting.
1,500-sheet feeder wiring diagram Figure 7-31 1,500-sheet feeder wiring diagram Printer and accessory wiring diagrams 431.
Duplex accessory wiring diagram Figure 7-32 Duplex-accessory wiring diagram 432 7 Troubleshooting.
Envelope-feeder-accessory wiring diagram Figure 7-33 Envelope-feeder -accessory wiring diagram Printer and accessory wiring diagrams 433.
Stacker-accessory wiring diagram Figure 7-34 Stacker-accessory wiring diagram 434 7 Troubleshooting.
Stapler/stacker-accessory wiring diagram Figure 7-35 Stapler/stacke r-accessory wiring diagram Printer and accessory wiring diagrams 435.
Dc controller connectors diagram Figure 7-36 Dc controller connectors diagram 436 7 Troubleshooting.
General timing diagrams The following sections contain timing diagrams for the printer. General timing diagrams 437.
HP LaserJet 4200 general timing diagram Figure 7-37 HP LaserJet 4200 general timing diagram 438 7 Troubleshooting.
HP LaserJet 4250 general timing diagram 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 WAIT Signal STBY INTR PRINT STBY LSTR Power switch ON (Unit: seconds) Print reservation design.
HP LaserJet 4300 general timing diagram Figure 7-39 HP LaserJet 4300 general timing diagram 440 7 Troubleshooting.
HP LaserJet 4350 general timing diagram 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 WAIT Signal STBY INTR PRINT STBY LSTR Power switch ON (Unit: seconds) Print reservation design.
Stapler/stacker timing diagram Figure 7-41 Stapler/stacker timing diagram 442 7 Troubleshooting.
8 Parts and diagrams Chapter contents ● Ordering parts and supplies ● Consumables and accessories ● Covers ● Internal components ● Accessories ● Alphabetical parts list ● Numerical parts.
Ordering parts and supplies This section contains information about how to order parts and supplies for this device. Parts This chapter contains field replaceable unit (FRU) and accessory part numbers. Replacement parts can be ordered from the HP Services.
HP provides free telephone support during the product warranty period. When you call, you will be connected to a responsive team waiting to help you. For the number you should call in your country/ region, see the support sheet that came in the box with your printer.
Supplies See Ordering parts and supplies . Consumables are available directly from HP at the following numbers: ■ US: 1-800-HPINVENT ■ Canada: 1-800-474-6836 ■ United Kingdom: 0734-441212 ■ Germany: 0130-3322 Contact your local HP Parts Coordinator for other local phone numbers.
Consumables and accessories Consumables 3 Figure 8-1 Consumables Table 8-2 Consumables Ref Item Product number Serv ice/exchange number 1 10,000-page print cartridge, LJ 4250/4350 printers Q5942A Q594.
Accessories Figure 8-2 Accessories 448 8 Parts and diagrams.
Table 8-3 Accessories Ref A ccessory Product number Serv ice/exchange number 1 500-sheet tray and feeder Q2240B Q2440-67903 2 1,500-sheet tray and feeder Q2444B Q2444-67902 3 Duplexer Q2439B Q2439-679.
Memory, fonts, and mass storage Figure 8-3 Memory, fonts, and mass storage Table 8-4 Memory, fonts, and mass storage Ref Item Product number Ser v ice/ exchange number 1 Firmware DIMM (LJ 4200, base m.
Ref Item Product number Serv ice/exchange number 3 Flash DIMM, 8 MB (LJ 4200/4300) C8530A 3 Flash DIMM, 12 MB (LJ 4200/4300) C7867A Table 8-4 Memory, fonts, and mass storage (continued) Consumables an.
Cables and connectivity Figure 8-4 Cables and connectivity Table 8-5 Cables and connectivity Ref Item Product number Ser v ice/ exchange number 1 HP Jetdirect 615n Fast Ethernet internal print server .
Formatters, laser/scanners, power supplies, and fusers Table 8-6 Formatters, laser/scanners, power supplies, and fusers Item Product number Ser v ice/e xc hange number Formatters Formatter, LJ 4200 Q9.
Assembly locations (1 of 3) Ref. Description Details 1 500-sheet universal replacement tray See Figure 8-14 500-sheet feeder (1 of 2) . 2 Feed roller assembly See Figure 8-11 Feed roller assembly . 3 Registration assembly See Figure 8-6 Internal components (1 of 3) .
Assembly locations (2 of 3) Ref. Description Details 4 Power-supply assembly See Figure 8-9 Electrical components . 5 Delivery assembly See Figure 8-8 Internal components (3 of 3) . 6 Fuser assembly See Figure 8-8 Internal components (3 of 3) . 7 Tray 1 pickup assembly See Figure 8-12 Tray 1 pickup assembly .
Assembly locations (3 of 3) Ref. Description Details 8 Duplexing-pendulum assembly See Figure 8-8 Internal components (3 of 3) . 9 Main-drive assembly See Figure 8-10 Main drive assembly 10 Paper-pickup-drive assembly See Figure 8-7 Internal components (2 of 3) .
Consumables and accessories 457.
Covers Figure 8-5 Covers 458 8 Parts and diagrams.
Table 8-7 Covers Ref Description Part number Qty 1 Cover, left (LJ 4200/4300) RC1-0287-020CN 1 1 Cover, left (LJ 4250/4350) RM1-1077-000CN 1 2 Cover, formatter RC1-0288-000CN 1 3 Cover, paper-handling.
Ref Description Part number Qty 13 Overlay, control panel, CS/HU/PL/EL (LJ 4250/4350) Q5400-60103 1 13 Overlay, control panel, NO/SV/FI (LJ 4250/4350) Q5400-60104 1 13 Overlay, control panel, ES/PT/IT.
Covers 461.
Internal components Figure 8-6 Internal components (1 of 3) 462 8 Parts and diagrams.
Table 8-8 Internal components (1 of 3) Ref Description Part number Qty 2 Spring, torsion RC1-0061-000CN 1 3 Transfer roller, LJ 4200/4300 RM1-0699-020CN 1 3 Transfer roller, LJ 4250/4350 RM1-1110-000C.
Ref Description Part number Qty 501 Screw, tapping, pan head, m4x10 XB4-7401-007CN 14 502 Screw, w/washer, m3x6 XB2-7300-607CN 2 464 8 Parts and diagrams.
Internal components 465.
Figure 8-7 Internal components (2 of 3) 466 8 Parts and diagrams.
Table 8-9 Internal components (2 of 3) Ref Description Part number Qty 1 Rod, switch RC1-0268-000CN 1 2 Guide, scanner cable RC1-0340-020CN 1 3 Guide, scanner cable RC1-0385-000CN 1 4 Gear, 18t RU5-00.
Ref Description Part number Qty 31 Sheet, solenoid damper RC1-0330-020CN 1 32A Cable, feeder connector (LJ 4200/4300) RG1-4223-000CN 1 32A Cable, feeder connector (LJ 4250/4350) RM1-1192-000CN 1 33 Ki.
Internal components 469.
Figure 8-8 Internal components (3 of 3) 470 8 Parts and diagrams.
Table 8-10 Internal components (3 of 3) Ref Description Part number Qty 1 Support, lifter-drive assembly RC1-0200-020CN 1 2 Duct, fan 2 (right side) (LJ 4300) RC1-0272-000CN 1 2 Duct, fan 2 (right sid.
Ref Description Part number Qty 26 Cable, fuser (LJ 4300) RG1-4231-000CN 1 27 Paper-delivery assembly RM1-0026-040CN 1 28 Duplexing-pendulum assembly RM1-0002-020CN 1 29 Lifter-drive assembly (LJ 4200.
Internal components 473.
Figure 8-9 Electrical components 474 8 Parts and diagrams.
Table 8-11 Electrical components Ref Description Part number Qty 1 Power-supply assembly, 110-127 V (LJ 4200) RM1-0019-050CN 1 1 Power-supply assembly, 220-240 V (LJ 4200) RM1-0020-000CN 1 1 Power-sup.
1 Figure 8-10 Main drive assembly 476 8 Parts and diagrams.
Table 8-12 Main drive assembly Ref Description Part number Qty Main drive assembly (LJ 4200/4300) RM1-0001-030CN 1 Main drive assembly (LJ 4250/4350) RM1-1066-000CN 1 1 Arm, cartridge-release RC1-0003.
Figure 8-11 Feed roller assembly 478 8 Parts and diagrams.
Table 8-13 Feed roller assembly Ref Description Part number Qty Feed-roller assembly RM1-0012-020CN 1 1 Clutch (CL101) (LJ 4200/4300) RH7-5358-000CN 1 1 Clutch (CL101) (LJ 4250/4350) RK2-0349-000CN 1 .
3 1 2 4 Figure 8-12 Tray 1 pickup assembly 480 8 Parts and diagrams.
Table 8-14 Tray 1 pickup assembly Ref Description Part number Qty Tray 1 pickup assembly (LJ 4200/4300) RM1-0004-060CN 1 Tray 1 pickup assembly (LJ 4250/4350) RM1-1097-000CN 1 1 Tray 1 RM1-0005-020CN .
Figure 8-13 PCAs 482 8 Parts and diagrams.
Table 8-15 PCAs Ref Description Part number Qty 1 Dc controller (LJ 4200) RG1-4236-040CN 1 1 Dc controller (LJ 4250/4350) RM1-1108-000CN 1 1 Dc controller (LJ 4300) RG1-4237-040CN 1 (not shown) Format.
Accessories Figure 8-14 500-sheet feeder (1 of 2) 484 8 Parts and diagrams.
Table 8-16 500-sheet feeder (1 of 2) Ref Description Part number Qty 500-sheet feeder and tray Q2440-67903 1 1 Lifter-drive assembly, 500-sheet feeder RM1-1094-000CN 1 2 Paper-pickup-drive assembly, 5.
Figure 8-15 500-sheet feeder (2 of 2) 486 8 Parts and diagrams.
Table 8-17 500-sheet feeder (2 of 2) Ref Description Part number Qty 1 Cover, front upper, 500-sheet feeder RC1-0486-020CN 1 2 Cover, left, 500-sheet tray RC1-0487-020CN 1 3 Cover, right, 500-sheet tr.
Figure 8-16 1,500-sheet feeder (1 of 2) 488 8 Parts and diagrams.
Table 8-18 1,500-sheet feeder (1 of 2) Ref Description Part number Qty 1,500-sheet feeder Q2444–67902 1 1 Paper-pickup assembly, 1,500-sheet feeder RM1-1134-000CN 1 2 Cover assembly, front, 1,500-sh.
Figure 8-17 1,500-sheet feeder (2 of 2) 490 8 Parts and diagrams.
Table 8-19 1,500-sheet feeder (2 of 2) Ref Description Part number Qty 1 Cover, right, 1,500-sheet feeder RC1-0661-000CN 1 2 Cover, left, 1,500-sheet feeder RC1-0662-000CN 1 3 Cover, rear, 1,500-sheet.
1 2 3 4 5 5 Figure 8-18 Stapler/stacker, stacker, and stapler 492 8 Parts and diagrams.
Table 8-20 Stapler/stacker, stacker, and stapler Ref Description Part number Qty 1 Stapler unit only RM1-1164-000CN 1 2 1,000-staple cartridge (3-pack) Q3216-60500 1 3 Stacker Q2442-67902 1 4 Stapler/.
Alphabetical parts list Table 8-21 Alphabetical parts list Description Part number Table and page 1,000-staple cartridge (3-pack) Q3216-60500 Stapler/stacker, stacker, and stapler 1,500-sheet feeder Q.
Description Part number Table and page Cable, laser (LJ 4250/4350) RM1-1198-000CN Internal components (2 of 3) Cable, media-size sensor, 1,500-sheet feeder RG1-4240-000CN 1,500-sheet feeder (2 of 2) C.
Description Part number Table and page Cover, left (LJ 4200/4300) RC1-0287-020CN Covers Cover, left (LJ 4250/4350) RM1-1077-000CN Covers Cover, left, 1,500-sheet feeder RC1-0662-000CN 1,500-sheet feed.
Description Part number Table and page Feed-roller assembly RM1-0012-020CN Feed roller assembly Flag, paper feed sensor RC1-0060-000CN Internal components (1 of 3) Flag, paper sensing RC1-0209-000CN I.
Description Part number Table and page Guide, tray 2 RC1-0153-030CN Internal components (2 of 3) Holder, paper pickup arm RC1-0212-000CN Internal components (2 of 3) Holder, paper sensing RC1-0208-030.
Description Part number Table and page Output bin (fits stapler, stapler/stacker, or stacker) RM1-0248-000CN Stapler/stacker, stacker, and stapler Overlay, control panel, AR (LJ 4250/4350) Q5400-60111.
Description Part number Table and page Power-supply assembly, 110-127 V (LJ 4250/4350) RM1-1070-000CN Electrical components Power-supply assembly, 110-127 V (LJ 4250/4350) (also see Figure 8-9 Electri.
Description Part number Table and page Screw, tapping, truss head, m4x16 XB4-7401-605CN Internal components (3 of 3) Screw, tapping, truss head, m4x8 XB4-7400-809CN Internal components (2 of 3) Screw,.
Description Part number Table and page Support, lifter-drive assembly RC1-0200-020CN Internal components (3 of 3) Swing plate assembly RM1-0043-020CN Internal components (2 of 3) Thermistor (LJ 4200/4.
Numerical parts list Table 8-22 Numerical parts list Part number Description Table and page C9651-67901 Formatter assembly (LJ 4300 printer) PCAs C9652-67902 Formatter assembly (LJ 4200 printer) PCAs .
Part number Description Table and page Q5400-60108 Overlay, control panel, EN/DE/FR/NL (LJ 4250/4350) Covers Q5400-60109 Overlay, control panel, FR (LJ 4250/4350) Covers Q5400-60111 Overlay, control p.
Part number Description Table and page RC1-0288-000CN Cover, formatter Covers RC1-0289-000CN Cover, paper-handling Covers RC1-0290-000CN Cover, legal (LJ 4200/4300) Covers RC1-0291-000CN Cover, duplex.
Part number Description Table and page RC1-3356-000CN Overlay, control panel, EN (LJ 4250/4350) Covers RG1-4201-000CN Cable, interface, upper, 500-sheet feeder (LJ 4200/4300) 500-sheet feeder (2 of 2).
Part number Description Table and page RK2-0269-000CN Solenoid, tray 2 pickup (LJ 4250/4350) Internal components (2 of 3) RK2-0272-000CN Motor, main (M101), 10–pin (LJ4250/4350) Internal components .
Part number Description Table and page RM1-0027-020CN Cover, rear output bin Covers RM1-0028-060CN 500-sheet universal replacement tray (LJ 4200/4300) 500-sheet feeder (1 of 2) RM1-0033-020CN Lifter-d.
Part number Description Table and page RM1-1066-000CN Main drive assembly (LJ 4250/4350) (also see Figure 8-10 Main drive assembly ) Internal components (1 of 3) RM1-1066-000CN Main drive assembly (LJ.
Part number Description Table and page RM1-1193-000CN Cable, envelope-feeder-connecting (LJ 4250/4350) Internal components (2 of 3) RM1-1195-000CN Control-panel assembly (LJ 4250/4350) Covers RM1-1198.
Part number Description Table and page XB4-7300-809CN Screw, tapping, truss head, m3x8 Internal components (2 of 3) XB4-7400-809CN Screw, tapping, truss head, m4x8 Internal components (2 of 3) XB4-740.
512 8 Parts and diagrams.
Index Symbols/Numerics 1,500-sheet feeder registration settings 71 1,500-sheet tray component locations 418 control PCA, removing 294 door, removing 290 feed rollers, removing 288 jams 373 lifter-driv.
classes 444 cleaning page automatic 73, 85 manual 83 cleaning stage, image-formation operations 159 cleaning the printer 82 clearable warnings setting 75 clutches pickup and feed operations 1 1 6 remo.
E e-mail alerts 315, 317 EconoMode 162, 380 EconoMode setting 72 EIO cards configuration page 312 operations 163 part numbers 452 settings 77 EIO slots 163 electrical specifications 20 electrostatic d.
HP Printing Supplies Returns and Recycling Program 45 HP Technical Training 444 HP Web JetAdmin firmware updates 100 HP-authorized resellers and support 445 humidity specifications paper, storing 30 printer requirements 24 I I/O menu 77 IBM OS/2 drivers 14 image quality.
jam detection operations, trays 122 labels 36 letterhead 32 lifter-driver operations 120 multiple pages feeding, troubleshooting 375 pickup and feed operations 1 1 4 print quality, troubleshooting 377.
out of toner 76 output bins locating 9 paper path test 80, 369 removing rear 203 settings 69 output quality black pages 398 blank pages 399 blurred print 397 cleaning page 83 dark print 400 defect exa.
HP-authorized resellers and support 445 service agreements 445 supplies ordering 446 photosensitive drum image-formation operations 106, 153 troubleshooting 380 physical specifications 18, 52 pickup r.
R RAM disk settings 76 Ready light 57 rear output bin locating 9 removing 203 settings 69 recovery, jam 76, 366 recycling 45 registration assembly operations 121 removing 266 registration settings 71 .
operating systems supported 12 solenoids 1,500-sheet tray 420 500-sheet feeder 417 removing 274 stacker and st a p l e r/ s t ac ke r 423 stacker operations 137 tray 2 operations 119 space requirement.
top output bin locating 9 settings 69 transfer roller image-formation operations 153 locating 411 operations 106 replacing 177 transparencies fuser modes 71 print quality, troubleshooting 378 specific.
parts ordering 444 UNIX and Linux drivers 13 weight, paper specifications 1,500-sheet tray 28 500-sheet tray 27 duplexer 28 envelope feeder 28 equivalence table 32 stapler/stacker 29 tray 1 26 tray 2 .
524.
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© 20 0 4 H e w le t t - P a c k a r d D ev e lopme n t C o m pa n y , L . P . www .hp.com/su ppor t/lj4 200 www .hp.com/su pport/lj43 50 www .hp.com/su ppor t/lj4 2 50 www .
Ein wichtiger Punkt beim Kauf des Geräts HP LaserJet 4250n (oder sogar vor seinem Kauf) ist das durchlesen seiner Bedienungsanleitung. Dies sollten wir wegen ein paar einfacher Gründe machen:
Wenn Sie HP LaserJet 4250n noch nicht gekauft haben, ist jetzt ein guter Moment, um sich mit den grundliegenden Daten des Produkts bekannt zu machen. Schauen Sie zuerst die ersten Seiten der Anleitung durch, die Sie oben finden. Dort finden Sie die wichtigsten technischen Daten für HP LaserJet 4250n - auf diese Weise prüfen Sie, ob das Gerät Ihren Wünschen entspricht. Wenn Sie tiefer in die Benutzeranleitung von HP LaserJet 4250n reinschauen, lernen Sie alle zugänglichen Produktfunktionen kennen, sowie erhalten Informationen über die Nutzung. Die Informationen, die Sie über HP LaserJet 4250n erhalten, werden Ihnen bestimmt bei der Kaufentscheidung helfen.
Wenn Sie aber schon HP LaserJet 4250n besitzen, und noch keine Gelegenheit dazu hatten, die Bedienungsanleitung zu lesen, sollten Sie es aufgrund der oben beschriebenen Gründe machen. Sie erfahren dann, ob Sie die zugänglichen Funktionen richtig genutzt haben, aber auch, ob Sie keine Fehler begangen haben, die den Nutzungszeitraum von HP LaserJet 4250n verkürzen könnten.
Jedoch ist die eine der wichtigsten Rollen, die eine Bedienungsanleitung für den Nutzer spielt, die Hilfe bei der Lösung von Problemen mit HP LaserJet 4250n. Sie finden dort fast immer Troubleshooting, also die am häufigsten auftauchenden Störungen und Mängel bei HP LaserJet 4250n gemeinsam mit Hinweisen bezüglich der Arten ihrer Lösung. Sogar wenn es Ihnen nicht gelingen sollte das Problem alleine zu bewältigen, die Anleitung zeigt Ihnen die weitere Vorgehensweise – den Kontakt zur Kundenberatung oder dem naheliegenden Service.
