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DESIGNJET L26500 printer series Maintenance and troubleshooting guide.
© 2011 Hewlett-Packard Development Company, L.P. 1st edition Legal notices The information contained herein is subject to change without notice. The only warranties for HP Products and services are set forth in the express warranty statement accompanying such products and services.
Table of contents 1 Safety precautions ........................ ............... ................... ................... ............... ............. ... 1 General safety guidelines ...... .......... ............ ........... ............ ............ .
Replace a n ink cartridge ......... ............ ............ ............ .......... ........... ............ .......... ............ .. ... 23 Replace the ink maintenance kit ............ ............. ............. ............. ........... .......
8 Troubleshoot ink-system issues ............. ............. ................... ................... .................. ..... 72 Ink mainte nance kit ne eds to be installed ............ .................................................................
vi ENWW.
1 Safety precautions Before using your printer, read the following safe ty precautions to make su re you use the equipment safely. You are expected to have the appr opriate technical trai ning and exp.
To avoid the risk of elec tric shock: ● Do not attempt to dismantle the drying and curi ng modules or the electrical c ontrol cabinet. ● Do not remove or open any other closed system covers or plugs. ● Do not insert objects through slots in the printer.
Mechanical hazard The printer has moving parts that could cause inju ry. To avoid personal in jury, take the following precautions when work ing close to the printer. ● Keep your clothing and all parts of your body away from the pr inter's moving parts.
Warning labels Label Explanation Risk of burns. Do no t touch the internal enclosures of drying and curing modules of the printer. Risk of burns. Do no t touch the drying enclosure of the printer. Even after opening the window latch, wh ich disconnects the power to the drying and curing modules, the in ternal surfaces could be hot.
2 Printer status Check printer status You can check the curre nt status of the printer in the follow ing ways: ● The Embedded Web Server displays the status of the printer, the loaded substrate and the ink system. To use the Embedded Web Server, enter your printer's URL into your Web browser.
The Supplies page shows you the status of the loade d substrate, the ink cartri dges, the printheads, the heaters, the printhea d cleaning kit, th e ink funnel and the ink maintenance kit. The traffic light shows whether maintenance is required. For further i nformation, click View details .
● Serial number ● Status (see Front-panel error messages on page 80 ) ● Volume of ink it has used ● Warranty status You can also use the E mbedded We b Server to ch eck the printhead status and the warra nty status. NOTE: If the warranty status is See warranty note , this indicates that no n-HP ink is being used.
3 Firmware update The printer's various functi ons are controlled by soft ware that resides in the printer, also known as firmware. From time to time, firmware upda tes from Hewlett-Packard become avai lable. These updates increase the printer's functionality and enhance its features.
4 Hardware maintenance For the task s in this chapt er, you ma y need th e User Maintenance Kit that was provided with your printer. Ink system tips For best results, always follow thes e guidelines: ● Follow the instructions on the front panel durin g installation.
The process take s about 10 minutes and starts immediate ly, unless an image is currently being printed. If a print job is in process, the alignment will be done as so on as the curren t print job is finished.
3. Stick it to the platen as shown. 4. Load the substrate that you want to check. 5. Open your RIP software. 6. Download the test file from inside the printer: http:// printerIP /hp/device/web Access/ images/Ink_trespassing_check.pdf , where printerIP is the IP address of your printer.
Clean the electrical connections on a printhead It is possible that the printer will not recognize a pr inthead after it has been installed. This can happen when ink builds up on the electrical connections between the printhead an d the printhead carriage.
3. Load the sponge by positioning the sponge on the face of the carriage inte rconnect wiper with the shorter tab in the locating slot. 4. Close the carriage interconnect wiper, trapping the spon ge in place. 5. Open the printhead carriage latch and extract th e printhead that is causing the problem, as indicated on the front panel.
8. Take special ca re to clean all contacts thoroughly , including the ones at the lowest point of the connector. 9. Using the same sponge, clean the lower strip of electrical contacts on the prin thead (unless the printhead is new) . Avoid touc hing th e upper set of electrical contacts.
13. Dispose of the soiled sponge in a safe place to pr event the transf er of ink onto hands and clothing. If the front panel continues to show the Reseat or Replace message, replace the printhead or call your service representa tive.
3. Use a clean, absorbent lint-free cl oth to thoroughly wipe any wet ink from the cutter grove, cutter ramp and platen. 4. With a dry brush, remove dry, loosened ink deposits from the cutter groove and cutter ramp. A brush is available in th e User Maintenance Kit.
6. Slightly dampen the used cloth with 95% ethanol to wipe the remaining dry ink deposits from t he platen. NOTE: 95% ethanol is not provided in the User Maintenance Kit. CAUTION: Ethanol is highly flammable. Obser ve the manufacturer’s safety precautions.
Clean after porous substrates If you print on a poro us substrate (through wh ich ink can pass), yo u should clean the platen immediately after each printing se ssion. Do not, for instance, leave the printer overnight or load a new roll without cleaning the platen first.
3. Wipe the sensor with one of th e cotton swabs provided in the Us er Maintenance Kit, slightly dampened with 95% ethanol, to remove dried ink. NOTE: 95% ethanol is not provided in the User Maintenance Kit.
4. Apply a few drops of the oil to the p ads on either side of the carriage. 5. Apply a few drops of oil directly to the slider r od on either side of the carriage. Press OK when this has been done. 6. Clean the substrate jam ref lector using a lint-fre e cl oth damp ened with distilled water.
2. Locate the small holes in the pl ate n near some of th e rollers. 3. Put three drops of oil into each hole in the platen. NOTE: Be careful not to spill oil onto the platen.
4. If oil spills onto the platen, wipe the platen cl ea n by using the cloth that was supplied with the User Maintenance Kit. 5. Close and lock the printer window. Maintain the ink cartridges During the normal lifetime of a cartridge, no specific maintenance is requir ed.
9. If you intend to turn the printer upside down or on its side, first remove the waste management system (see Re place the ink maintenance kit on page 27 and Replace the printhead cleaning kit on page 35 ). 10. For correct environmental storage co ndit ions, see the specifications in the User's guide .
2. Grip the blue tab in front of the cartridge that you want to remove. 3. Pull the blue tab down and then pull it outwards, towards you. 4. The cartridge comes out, in its drawer.
6. The front-panel display identifi es the missing ink cartridge . Insert an ink cartridge 1. Pick up the new ink car tridge and find the label that identifies the ink colo r. Hold the ink cartridge so that you can see the label at the top of t he side th at is facing you.
6. The front-panel display confirms that all cartridges have been correctly inserted. Refilled and non-HP ink cartridges HP recommends that you replace an emp ty cartridge with a new HP cartridge. The use of refilled or non- HP ink ca rtridges has several disadvantages.
Replace the ink maintenance kit The ink maintenance kit contains the ink funnel, the in k tube assembly and the ink filter. The front p anel prompts you when these compon ents need to be replaced. NOTE: When you have removed the ink tube assembly , you cannot reuse it: you must install a new assembly.
6. Locate the ink funnel. 7. Pull the slider with one finger w hile remo ving the ink funnel with the other hand. NOTE: You are recommended to wear gloves. 8. Remove the ink tube assembly su pport and the ink tube assembly. 9. Insert the new ink tube assembly.
10. Pull the slider with one finger while inserting the new ink funnel with the other hand. 11. Press the ink funnel into place. 12. Remove the cap from the bottom of the ink t ube assembly. 13. Insert the b ottom of the in k tube a ssembly into the printhead cleaning container.
14. Open the ink filter cover. 15. Remove the old ink filter and insert a ne w one. 16. Close the ink filter cover. 17. Close and lock the window. Replace a printhead Remove a printhead 1. On the printer's front panel, select the icon, then select Replace printheads .
3. When the carriage has stopped moving, the front panel prompts you to open the printer window. Unlock and open the window. 4. Locate the carriage on the right side of the printer. CAUTION: Avoid touching the printer's dryi ng enclosure, which may be hot.
7. To remove a printhead, lift up the blue hand le. 8. Using the blue handle, ge ntly disengage the printhea d. 9. Gently pull the blue handle upward until the printhead is released from the carriage. CAUTION: Do not pull abruptly. That action can dam age the printhead.
Insert a printhead 1. If the printhead is new, shake it vigorously be fore r emoving the protective caps. Hold the printhead upright (with the protec tive caps facing down) and shak e the printhead vigorously in a smooth up and down motio n for about 15 seconds.
5. Push down as indicated by the arrow. CAUTION: You might feel some resistance when inst alling the new printhead, so you need to press it down firmly but smoothly. You should hear a beep and see co nfirmation on the fr ont-panel display that the printhead has been inserted.
9. Close and lock the printer window. 10. The front-panel display confirms that all of the pr inthea ds are correctly inserted. The print er starts checking and pr eparing the prin theads. T he default routine process, w hen all prin theads ar e changed, takes up to 18 minutes.
Follow these prec autions when removi ng a printhead cleaning cartridge: ● Be careful not to get ink on your hands. In k may be on, ar ound and inside the re placed printhead cleaning cartridge. ● Always handle and store the repla ced printhea d cleaning cartridge upright to avoid spilling any ink.
6. Remove the plastic cover from the new printhead cleaning cartridge. 7. Insert the printhead cleaning cartridge into th e slot, in the dir ection indicated by the arrow. 8. When the printhead clea ning cartridge has b een pushed all the way in, press inwards and downwards as indic ated, until it click s into place.
11. Locate the ink funnel. 12. Pull the slider with one finger w hile remo ving the ink funnel with the other hand. NOTE: You are recommended to wear gloves.
14. Press the ink funnel into place. 15. Close and lock the window. 16. Open the ink filter cover. 17. Remove the old ink filter and insert a ne w one.
19. Remove the printhead cleaning container. 20. Insert the new printhead cleaning container. NOTE: Before it can resume printing , the printer needs all the ink cartridges, printheads and printhead cleaning cartridge to be installed, and the printer window and printhead cleaning cartridge door to be closed .
5 Substrate settings Download media presets Each supported substrate has its own characteristic s. The printer changes the way it prints on each different substrate. The RIP requires a description of the re quirements of each substrate. This description is called the “media preset”.
Summary Select printer settings and color profile The correct printer settings for your substrate may be available from your RIP vendor or s ubstrate vendor. If not, you can start by copying printer settin gs from a s imilar substrate of the same family.
Substrate family Drying temp. Curing temp. Heati ng airflow Auto- tracking (OMAS) Cutter Substrat e- advan ce compens ation Input tensio n Vacuum Self-adhesive 55 110 30 Yes Yes 0 15 25 Banner 50 110 .
Setting Description If too low If too high Substrate advance compensation Your printer was calibrated at the factory to ensure that it advances the substrate accurately when using suppo rted substrates in normal environmental conditions.
Setting Description If too low If too high Cutter The printer's built-in cutter can cut the substrate automatically between each print. Disable the cutter in the followin g cases: ● You want to increase the speed of printin g. ● You want to use the take-up reel.
Change settings while printing You can use the front panel to chang e the following settings wh ile printing. ● To change temperature an d vacuum settings while printing: select the icon, then Image quality maintenance > Adjust printing params , and choose the sett ing that you want to adjust.
Subst rate family Warm-up drying temperat ure offset Warm-up curing temperat ure Warm-up curing tempe rat ure offset Cool- down drying temperat ure Cool- down dryin g temperat ure offset Cool- down curing temperat ure Cool- down curing temperat ure offset Minimum drying power L o w - t e m p .
Temperature profile Many of the main an d advanced su bstrate settings ar e related to temperature co ntrol, since this is a critical area for correct printing results with late x inks on a wide variety of substrates. The diagram below graphically represents the evolution of dryi ng and curing temperatures during the variou s printing phases.
Passes Uni/ bidir Self adhesi ve Banner Te xtile Film Synthet ic paper Paper aqueo u s Paper solvent Low temp. Mesh 18* Bidi r Yes Yes Yes Yes Yes Yes Yes Yes Yes 20 to 32 Bidir Yes Yes Yes Yes Yes Yes Yes Yes Yes * Unlike other printmodes, the 18-p ass printmode has 1200 dpi x 1200 dpi input data resolution at 1 bpp (1 bit per pixel).
● Horizontal bands. ● Coalescence, grain (can be ca used by an excess of light ink). Try reducing the amount of ink in your RIP so ftware, then reprint the chart and check again. You may have chosen a media preset that uses mo re ink than your substr ate allows.
3. Too little ink: The whole chart looks washe d out. Try increasing the amount of ink in your RIP software, then reprint the chart and check again. You may have chosen a media preset that uses le ss ink than your substrate allows.
In outline, the proc ess consists of the following st eps. 1. A calibration test chart is printed. 2. The HP Embedded Spectrophotomete r (or, if you prefer , a differen t spectrophotometer) scans and measures the test chart.
Color reproduction tricks Latex inks are a new technolo gy, and there are some impo rtant guidelines whe n doing color separations (such as when creating or modifying a ne w media preset within your RIP) that will help to optimize the printer output in term s of color gamut, ink usage and print quality.
6 Troubleshoot print-quality issues General printing advice Use the following appr oach when yo u have any print-qu ality problem: ● Make sure that the substrate type that you select on the front panel, and in your RIP software, is the same as the substrate type that is loaded in the pr inter.
Interpret the prin thead status plot The print consists of small dashes, one for each no zzle on each printhead. For each individual colored pattern, make su re that most of the dashes are presen t. Corrective action 1. Clean any f aulty printheads. See Clean the printheads on page 73 .
If you see this kind of problem: ● Ensure that the vertical correction option is disabl ed in the RIP and in the front panel. At the front panel, select the icon, then select Image quality maintenance > Disable vertical correct. (if this option is available).
● If bands affect only some col ors, th e cause could be a defective printhead. ◦ Print the printhead status plot (see Use the printhead status plot on page 54 ). If necessary, clean the printheads (see Clean (recover) the printheads on page 18 ).
Substrate advance adjustment on the fly If you are using no more than si x passes, you can fine-tune the subs trate advance while printing: select the icon, then select Image quality maintenance > Substrate ad vance calibr ation > Adjust substrate advance .
◦ If applicable, tell the RIP to group jobs togeth er, so that printer temperatures remain more stable between jobs. ◦ Modify your media pres et as suggested in Color reproduction tricks on page 53 . ● Irregular or isolated vertical bands ◦ Increase the vacuum level in steps of 10 mmH 2 O.
If you notice such a problem, th ere are various possible sol utions. ● At the front panel, select the icon, then select Image quality maintenance > Enable color variation correction . This correction will then remain enabled until you disable it.
Ink smears Ink smears may be seen on the print for the following reasons. ● The substrate is skewed. Do not ignore the wa rning message that appe ars d uring the loading process if there is significant skew. ● The substrate is not flat in the print zone.
The ink smudges when touched, or looks oily There are variou s different circumstances in which these symptoms can be se en. ● When there is a big transition from light to dark colors across the length or width o f the substrate Increase the minimum drying power.
Tiling issues The most common problems when printing tiles are as follows. ● Color degradation within individual tiles In many cases, individual tiles are long and contain very large areas of solid colors.
7 Troubleshoot substrate issues The substrate cannot be loaded successfully Here are some suggestions to try if yo u cannot load the substrate successfully. ● Reread the loading instructions in the User's guide , and make sure that you are following them.
If you see the above display on th e front panel, proceed as follows. 1. Lift the substrate lever. 2. Manually repos ition the substrate on the platen. 3. Lower the substrate lever. 4. Repeat the above steps until the front panel displays the Ready message.
3. Cut the substrate where it enters th e printer, and rewind the input roll. 4. Wait for the printer to cool down to room temperature. 5. Try to move the printhead carriage out of the way. 6. Lift the substrate-adjustment le ver as far up as it will go.
10. Close and lock the window. 11. Turn on the printer. 12. Reload the roll. 13. If some substrate continues to cause an obstructio n within the printer, it can often be cleared by loading a rigid substrate type into the printer. 14. If you find that you have print- quality problems a fter a jam, tr y realigning the printheads.
● Increase the vacuum level in steps of 10 mmH 2 O. Do not exceed the following limits: 20 mmH 2 O for banners, 35 mmH 2 O for vinyl, and 50 mmH 2 O for other substrate families. ● Decrease the warm-up drying tempera ture in steps of 5°C. ● Decrease the warm-up c uring temperature in step s of 5°C.
This deformation may be particularly no ticeable in the following applications. ● Printing images that will later be cut automatica lly or manually. When there is bow deformation, cutters that are aligned on the sides may lose alignment in the center.
If the problem remains after removi ng the substrate jam, unload the take-up reel from the front panel and load it again. Take-up reel does not wind Predictably, if the take-up re el is not winding as anticipated, the prin ted output is likely to end up on the floor.
1. Take-up reel sensor 2. Take-up reel sensor and cable housing unit ENWW Take-up reel does no t wind 71 Troubleshoot substrate.
8 Troubleshoot ink-system issues Ink maintenance kit needs to be installed If the front panel tells you that the ink maintena nce kit n eeds to be insta lled, it means that the kit has not been installed in your printer.
Front panel recommends reseating or replacing a printhead 1. Remove the printhead a nd check that it is free fr om physical damage and from ink stains on the electrical connections. 2. If necessary, clean the electr ical connections between the print head and the carriage.
TIP: Use the same substrate you intend to print on to align the printheads. WARNING! Colored substrates, glossy canvas, and t ransp arent ma terials such as translucent bond, clear film, tracing paper, and vellum are not suit abl e for aligning the printheads.
3. If the substrate type that is lo aded is acceptable for pr inthead alignment, the printer performs the alignment and prints an alignment pattern. NOTE: Make sure the printer window is closed during pr inthead alignment. 4. The process takes about 5 minutes.
9 Troubleshoot other issues The printer cannot get an IP address If your network has no DHCP server, the printer cann ot automatically retrieve an IP address. In this case, you must set the printer's IP ad dress manually, in the following way. 1.
proxy configuration check bo x is selected, add the pr inter's IP address to the list of exceptions, for which the proxy server is not used. The printer is not printing Possible reasons why a file you have sent from yo ur computer is not printing when expected, include the following: ● There may be a problem with the electrical power.
● Does your image contain high-density black fills? That may increase printing time. ● If your printer is connected to a network, check the following points. ◦ Ensure that all components used in the networ k (network interface cards, routers, switches and cables) are capable of h igh-speed o peratio n.
● If the printer is conne cted to your co mputer thro ugh any other intermediate devices, such as switch boxes, buffer bo xes, cable adapte rs, or cable conv erters, remove the interm e diate device and try connecting the printer directly to your computer.
10 Front-panel error messages Under certain circumstances, a front-panel er ror messag e appears. Follow the advice in the Recommendation column to resolve the err or. If an error message appears on the front panel that is not included in this list, and you are in do ubt of the correct response, call your service representative.
Table 10-1 Text messages (continu ed) Message Recommendation Ink maintenance kit not installed The installation of the in k maintenance kit has been cancell ed. To complete the installation, see Replace the ink maintenanc e kit on page 27 . IO error Restart the printer.
Table 10-2 Numeric error messages (continued) Error code Reco mmendation 15.03:00 Excessive heat in th e dryi ng module. Check that all fans are working and unblocked. If the problem persists, call your service representative. See When you need help on page 86 .
Table 10-2 Numeric error messages (continued) Error code Recommendation 32:01.1 This error occurs when there is a s mall amount of substrate printed, less than 79 in (200 cm) long.
Table 10-2 Numeric error messages (continued) Error code Reco mmendation 61:01 The file format is incorrect and the printe r cannot process the job. Try the following remedies: ● Turn off the printer by using the Power key on the front panel and the power switch at the back of the printer.
Table 10-2 Numeric error messages (continued) Error code Recommendation 76:03 A “disk out of space” has o ccurred. Try the following remedies: ● Turn off the printer by using the Power key on the front panel and the power switch at the back of the printer.
11 When you need help Introduction HP Customer Care offers aw ard-winning s upport to ensure that you get the most from your HP Designjet. HP Customer Care prov ides comprehensive, proven supp ort expertise and new technologies to give you unique end-to-end su pport.
HP Customer Care Centers Help is available to you by teleph one. What to do before you call: ● Review the troubleshooting suggestions in this guide. ● Review your RIP's documentation, if relevant.
A Summary of common printing problems This is a table of comm on problems and the RIP para meters that can be changed in order to solve the problem. Some possible side-effec ts are also shown. For a more d e tailed treatment of any particular problem, please see the rele vant chapter in this guide.
Index A add new substrate 41 alerts errors 7 alerts, warnings 7 application hangs up 77 B bow deformation 68 C calibration color 51 cannot load subs trate 64 carriage lubrication 19 caution 3 clean th.
color intensity varies 59 general 54 graininess 55 horizontal banding 56 ink smears 61 ink smudges 62 lack of shar pness 60 misaligned colors 59 stains or uneven print 61 tiling 63 vertical banding 58.
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