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GNS 430 Shown GARMIN International, Inc. 1200 E. 151 st Street Olathe, KS 66062 USA 190-00140-05, Revision C October 2002 400 SERIES MAINTENANCE MANUAL (GNS ¥ 430, GNC ¥ 420, GPS 400).
Page A 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 © Copyright 1999-2002 GARMIN Ltd. or its subsidiaries All Rights Reserved GARMIN International, Inc. 1200 East 151st Street, Olathe, Kansas 66062, U.S.A. GARMIN (Europe) Ltd. Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey, SO51 9AQ, U.
400 SERIES MAINTENANCE MANUAL Page i P/N 190-00140-05 Rev. C LIST OF EFFECTIVE PAGES Page Revision Page Revision Page Revision Page Revision A C 4-8 C 5-54 BLANK F7-24 BLANK i C 5-1 C 6-1 C A-1 C i i .
Page ii 400 SERIES MAINTENANCE MANUAL P/N 190-00140-05 Rev. C The following are General Safety Precautions that are not related to any specific procedure and therefore do not appear elsewhere in this maintenance manual. These are recommended precautions that personnel should understand and apply during the many phases of maintenance and repair.
400 SERIES MAINTENANCE MANUAL Page iii P/N 190-00140-05 Rev. C TABLE OF CONTENTS SECTION 1 DESCRIPTION AND OPERATION Paragraph Page 1.1 INTRODUCTION .................................................................................................... 1-1 1.
Page iv 400 SERIES MAINTENANCE MANUAL P/N 190-00140-05 Rev. C SECTION 3 TROUBLESHOOTING Paragraph Page 3.1 TROUBLESHOOTING EQUIPMENT ..................................................................... 3-1 3.2 TROUBLESHOOTING ORDER ..................
400 SERIES MAINTENANCE MANUAL Page v P/N 190-00140-05 Rev. C SECTION 5 ALIGNMENT, CALIBRATION, AND TESTING Paragraph Page 5.1 INTRODUCTION ................................................................................................. 5-1 5.2 RECOMMENDED TEST EQUIPMENT .
Page vi 400 SERIES MAINTENANCE MANUAL P/N 190-00140-05 Rev. C SECTION 5 ALIGNMENT, CALIBRATION, AND TESTING (continued) 5.7.2.8 Sidetone ........................................................................................................ 5-18 5.7.
400 SERIES MAINTENANCE MANUAL Page vii P/N 190-00140-05 Rev. C SECTION 5 ALIGNMENT, CALIBRATION, AND TESTING (continued) 5.7.4 Navigation Assembly I/O Tests .................................................................... 5-32 5.7.4.1 Localizer Course Deviation Test .
Page viii 400 SERIES MAINTENANCE MANUAL P/N 190-00140-05 Rev. C SECTION 5 ALIGNMENT, CALIBRATION, AND TESTING (continued) 5.7.6.14 MAIN Vertical UP, DOWN Outputs................................................................ 5-47 5.7.6.15 MAIN To/From Output .
400 SERIES MAINTENANCE MANUAL Page ix P/N 190-00140-05 Rev. C APPENDIX A GNC 420A AND GNS 430A A.1 DESCRIPTION ....................................................................................................A-1 A.2 ‘A’ VERSION PART NUMBERS ...
Page x 400 SERIES MAINTENANCE MANUAL P/N 190-00140-05 Rev. C LIST OF FIGURES Figure Page 2-1 Com Chassis Nut ................................................................................................. 2-1 2-2 Signal And Load Drawing-J1 (Sheet 1 of 2) .
400 SERIES MAINTENANCE MANUAL Page xi P/N 190-00140-05 Rev. C LIST OF TABLES Table Page 1-1 Unit Configuration ................................................................................................ 1-1 3-1 Unit Board Power Supply Max Current Allowed .
Page xii 400 SERIES MAINTENANCE MANUAL P/N 190-00140-05 Rev. C LIST OF TABLES (con’t.) Table Page 6-25 Sub-Assy, CDU, GNC 420, Black (Unit P/N 011-00281-01, Figure 7-4) ........... 6-23 6-26 Sub-Assy, CDU, GNC 420, Gray (Unit P/N 011-00281-05, Figure 7-4) .
400 SERIES MAINTENANCE MANUAL Page 1-1 P/N 190-00140-05 Rev. C SECTION 1 DESCRIPTION AND OPERATION 1.1 INTRODUCTION References made to the GNS 430 and the GNC 420 throughout this manual equally apply to the GNS 430A and the GNC 420A except where specifically noted.
Page 1-2 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 GPS 400: UNIT P/N COLOR 011-00504-00 Black 011-00504-10 Gray GNC 420: UNIT P/N COLOR OPERATING VOLTAGE MINIMUM XMIT PWR 011-00506-00 BLAC.
400 SERIES MAINTENANCE MANUAL Page 1-3 P/N 190-00140-05 Rev. C Each of the configurations includes a color display providing graphical moving map capability. Navigation, communication, and m apping functions are supported by a navigation database provided by a removable database card.
Page 1-4 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 1.3 REPAIR PLAN This manual is designed to allow the user to perform board-level repair. If necessary, the unit can be returned to GARMIN for complete service work. Contact GARMIN at the address given on Page A (inside cover) for further service information.
400 SERIES MAINTENANCE MANUAL Page 1-5 P/N 190-00140-05 Rev. C 1.5.2 Com Board The Com Board contains the VHF COM Transceiver that provides voice comm unication in the 118.
Page 1-6 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 1.5.5 Glideslope Board The Glideslope Board contains a processor controlled Glideslope Receiver which operates from 329.15 MHz to 335.00 MHz in 150 kHz increments for 40 Glideslope channels.
400 SERIES MAINTENANCE MANUAL Page 2-1 P/N 190-00140-05 Rev. C SECTION 2 SPECIAL TOOLS AND TEST EQUIPMENT 2.1 INTRODUCTION This section identifies the special tools and test equipment needed to maintain the 400 Series Units. Standard equipment is not listed.
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400 SERIES MAINTENANCE MANUAL Page 2-3 (Page 2-4 blank) P/N 190-00140-05 Rev. C Figure 2-2. J1 Signal and Load Drawing (Sheet 1 of 2).
400 SERIES MAINTENANCE MANUAL Page 2-5 (Page 2-6 blank) P/N 190-00140 Rev. C Figure 2-3. J1 Signal and Load Drawing (Sheet 2 of 2).
400 SERIES MAINTENANCE MANUAL Page 2-7 (Page 2-8 blank) P/N 190-00140-05 Rev. C Figure 2-4. J2 Signal and Load Drawing.
400 SERIES MAINTENANCE MANUAL Page 2-9 (Page 2-10 blank) P/N 190-00140-05 Rev. C Figure 2-5. J6 Signal and Load Drawing.
400 SERIES MAINTENANCE MANUAL Page 3-1 P/N 190-00140-05 Rev. C SECTION 3 TROUBLESHOOTING Each unit in the 400 Series contains static sensitive components. Observe proper anti-static procedures when testing the unit. Hazardous voltages exist on the Inverter Board (all units).
Page 3-2 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 3.3 TROUBLESHOOTING PROCEDURES 3.3.1 Fuses Check for blown fuses on the Main Board, Com Board, and Nav Board as shown in Figures 3-1 through 3-4. If blown fuses are found, try to determine the cause of the fuse failure before installing a new fuse.
400 SERIES MAINTENANCE MANUAL Page 3-3 P/N 190-00140-05 Rev. C LOCA TION OF F600 (7A FUSE ) ON -00/-02/-03 COM BOARDS Figure 3-2. Com Board Fuse Location/F600 LOCATION OF F600 ON -04 REV C COM BOARDS TO PRES ENT (F600 REPLACED WITH R611, EXCEPT ON -0 4 REV A AND B BOARD) Figure 3-3.
Page 3-4 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 F501 1 AMP J6 F502 1 AMP Figure 3-4. Nav Board Fuse Locations 3.3.2 Power Supply Checks 3.3.2.1 Current Measurements Taking intra-board and external current measureme nts is one way of determining a faulty board.
400 SERIES MAINTENANCE MANUAL Page 3-5 P/N 190-00140-05 Rev. C The values listed in Table 3-1 are with the display backlight at maximum brightness. Table 3-1. Unit Board Power Supply Max Current Allowed Unit (Main Board) Unit Status Max Current (A) @ 27.
Page 3-6 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 3.3.2.3 Glideslope Board Replace the Main Board if any voltage on the G/S Board is not within tolerance.
400 SERIES MAINTENANCE MANUAL Page 3-7 P/N 190-00140-05 Rev. C I - 111 0 I-1 00 Figure 3-5. Processor Location (Main Board) 3.4 STATIC MESSAGES The unit informs the user of operational status using the messages listed in Table 3-5. These messages can help in isolating a faulty assembly.
Page 3-8 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Table 3-5. Static Messages MESSAGE RECOMMENDED ACTION Stored data was lost Replace Main Board (see paragraph 4.5.5) Main processor requires service Replace Main Board (see paragraph 4.5.5) Memory battery low Replace Memory Battery (see paragraph 4.
400 SERIES MAINTENANCE MANUAL Page 3-9 P/N 190-00140-05 Rev. C Table 3-5. Static Messages (continued) COM remote transfer key stuck Verify that Remote Transfer Key Line is not stuck before replacing COM Board Replace Com Board (see paragraph 4.5.4) Heading input failure Replace Main Board (see paragraph 4.
Page 3-10 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 3.5 TESTING FAILURES Another approach in troubleshooting is to perform testing on a unit according to the test procedures given in Section 5. To save time, only perform the minim um amount of testing in order to isolate the suspect board.
400 SERIES MAINTENANCE MANUAL Page 3-11 P/N 190-00140-05 Rev. C Table 3-6. Testing Failures Main Board (continued) TEST FAILURE TEST PARAGRAPH RECOMMENDED ACTION GPS Antenna Bias 5.7.6.10 Replace GPS Module (see paragraph 4.5.5) GPS Noise 5.7.6.11 Replace GPS Module (see paragraph 4.
Page 3-12 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Table 3-7. Testing Failures COM Board TEST FAILURE TEST PARAGRAPH RECOMMENDED ACTION Power Input Check 5.7.2.1 Replace Main Board (see paragraph 4.5.5) Replace Com Board (see paragraph 4.
400 SERIES MAINTENANCE MANUAL Page 3-13 P/N 190-00140-05 Rev. C Table 3-8. Testing Failures NAV Board TEST FAILURE TEST PARAGRAPH RECOMMENDED ACTION Localizer Course Deviation Test 5.7.4.1 Replace Nav Receiver Board (see paragraph 4.5.6) To/From Deflection Output Characteristic Test 5.
Page 3-14 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Table 3-10. Testing Failures NAV Receiver TEST FAILURE TEST PARAGRAPH RECOMMENDED ACTION Voice/Ident Audio Output Level 5.7.3.1 Replace Nav Receiver Board (see paragraph 4.5.6) Voice/Ident Audio Frequency Response 5.
400 SERIES MAINTENANCE MANUAL Page 3-15 P/N 190-00140-05 Rev. C 3.6 EXTERNAL CONNECTORS Figure 3-6 shows the external connectors and their corresponding pin numbers for each unit.
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400 SERIES MAINTENANCE MANUAL Page 3-17 (Page 3-18 blank) P/N 190-00140-05 Rev. C Figure 3-7. 400 Series Block Diagarm.
400 SERIES MAINTENANCE MANUAL Page 4-1 P/N 190-00140-05 Rev. C SECTION 4 DISASSEMBLY AND ASSEMBLY 4.1 INTRODUCTION Repairing the unit is accomplished by removing and replacing defective boards. To help disassemble and reassemble the unit in order to access the boards, look at the assembly drawings in Section 7 and the parts lists in Section 6.
Page 4-2 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 4.3 NAV DATA CARD REMOVAL AND INSERTION Before disassembly begins, remove the Jeppesen NavData® card supplied with the unit. The card can be installed or removed when the unit is on or off.
400 SERIES MAINTENANCE MANUAL Page 4-3 P/N 190-00140-05 Rev. C 4.4 UNIT DESIGN Each unit consists of a Main and Nav Chassis, CDU Assembly, and a Top Cover. The Main Chassis has a Top and Underside Cavity which contains replaceable boards. The following is a typical order of disassembly: 1.
Page 4-4 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 4.5.2.1 Disassemble the CDU Assembly x Remove the Flex Assemblies (Figure 7-4) 1. Remove the VOL w/’C’ and VOL w/’V’ Knobs (18 and 19). 2. Remove the Push ‘CRSR’ and Push ‘C/V’ knobs (21, 22, 20, and 28).
400 SERIES MAINTENANCE MANUAL Page 4-5 P/N 190-00140-05 Rev. C 4.5.4 Remove Faulty Boards from the Main Chassis Top Cavity Remove the Top Cover (see paragraph 4.5.1) to access the Main Chassis Top Sub-assemblies. x COM Board (Figure 7-2) Steps 5 and 6 apply to 28V/10W units only.
Page 4-6 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 x GPS Module (Figure 7-2) 1. Disconnect the Ribbon Cable from the GPS Module (011-00474-XX). 2. Remove screw (211-60234-11) attaching the Map Board (012-00296-00) to the Main Chassis (125-00034-01).
400 SERIES MAINTENANCE MANUAL Page 4-7 P/N 190-00140-05 Rev. C x Glideslope Board (Figure 7-3) 1. Remove the Glideslope Board Cover (115-00221-00). 2. Disconnect the Ribbon Cable (325-00063-01) from the Glideslope Board (012- 00212-XX). 3. Unsolder the connector wire from the Coax Connector (330-00070-03).
Page 4-8 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 1. Remove the Main Board (paragraph 4.5.5). 2. Remove all electrical grounds from the unit, so if using a grounded tip soldering iron, the battery will not be shorted upon removal. 3. Unsolder the battery leads from the bottom side of the Main Board.
400 SERIES MAINTENANCE MANUAL Page 5-1 P/N 190-00140-05 Rev. C SECTION 5 ALIGNMENT, CALIBRATION, AND TESTING 5.1 INTRODUCTION This section provides unit-level alignment, calibration, and testing information for the 400 Series units.
Page 5-2 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Avionics Signal Generator IFR or Marconi 2030 w/options one and six. BF Goodrich Precision Track Selector Digital Voltmet.
400 SERIES MAINTENANCE MANUAL Page 5-3 P/N 190-00140-05 Rev. C UNIT UNDER TEST BIRD WA TT M E T E R 30 dB 50 W A TT A TTENUA TOR 50 OHM LOAD RF INPUT AT T E N U AT E D RF OUTPUT NOTE 5 0 O H M L O A D IS N O T R E Q U IR E D I F 30 dB A T TE N U A TO R I S U S ED .
Page 5-4 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 5.4.1.2 Standard Signals COM RF Level Units All specifications given for the com transceiver are in HARD units. To arrive at these units adjust the RF generator to the level specified and insert a 6 dB pad at the output of the RF generator.
400 SERIES MAINTENANCE MANUAL Page 5-5 P/N 190-00140-05 Rev. C Standard Glideslope Centering Test Signal Standard Glideslope centering test signal is a standard Glideslope test signal in which the difference in depth of modulation of the 90 and 150 Hz signals is less than 0.
Page 5-6 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 G/S Super Flag Load (G/S SUPER FLAG OUT) One standard super flag load shall be 56 ohms connected between G/S SUPER FLAG OUT J6-38 and GND J6-41. ARINC 429 Transmitter Load (VLOC 429 OUTA/OUTB) The standard ARINC 429 transmitter load shall be 2.
400 SERIES MAINTENANCE MANUAL Page 5-7 P/N 190-00140-05 Rev. C Standard VOR Audio Test Signal Standard VOR audio test signal is a standard VOR test signal to which is added a 1000 Hz signal, amplitude modulating the carrier 30%. Standard Audio Test Signal Standard audio test signal is a RF carrier amplitude modulated 30% at 1000 Hz.
Page 5-8 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Standard Localizer Centering Test Signal Standard localizer centering test signal is a standard localizer test signal in which the difference in depth of modulation of the 90 and 150 Hz signals is less than 0.
400 SERIES MAINTENANCE MANUAL Page 5-9 P/N 190-00140-05 Rev. C 5.5 ALIGNMENT Board alignment is not recommended on any of the 400 Series units. Alignment is performed on individual boards at the factory before being shipped as replacement items.
Page 5-10 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 5.6.1 Com Setup Page Fields 5.6.1.1 Com Frequency The Com Frequency field selects a VHF communication frequency. For purposes of setting the squelch, sidetone levels and mic gain, only the frequencies 118.
400 SERIES MAINTENANCE MANUAL Page 5-11 P/N 190-00140-05 Rev. C 5.6.1.5 Sidetone The sidetone audio output level is independent of the COM volume knob on the unit. The SIDETN field sets the sidetone audio output level. The sidetone can be set to any value between zero and 63.
Page 5-12 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 5.7 TEST PROCEDURES 5.7.1 Test Mode In order to perform certain tests in the following section, the GNS 430 must be put into test m ode, which allows access to the Test Pages (Figure 5-4).
400 SERIES MAINTENANCE MANUAL Page 5-13 P/N 190-00140-05 Rev. C Figure 5-4. Test Pages.
Page 5-14 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 5.7.2 Com Testing Before starting com testing, note the following: 1. Disable the audio compressor unless otherwise specified. The compressor can be disabled for testing purposes by manually grounding the SQUELCH/COMPRESSOR TEST input at Pin 3 of J2 .
400 SERIES MAINTENANCE MANUAL Page 5-15 P/N 190-00140-05 Rev. C 3. Transmit Mode: +14/+28 Volt Radios (J2-11 and 12): Voltage _________ (+ 13.75 V) Tolerance _________ ( r 0.2 V) Max Current Avg 1 _________ (6.0 A) 5.7.2.2 RF Power Out 1. Set input voltage to 27.
Page 5-16 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Figure 5-5. Modulation Measurement Figure 5-5 shows the output of the Narda Crystal Detector display ed on an oscilloscope. The oscilloscope must be DC coupled in order for the modulation signal to be displayed correctly.
400 SERIES MAINTENANCE MANUAL Page 5-17 P/N 190-00140-05 Rev. C 5.7.2.5 Carrier Noise Level 1. Apply a standard MIC input signal. 2. The demodulated noise on the transmitter output, without audio m odulation, shall be at least 45 dB below the demodulated audio level obtained when the transmitter is m odulated with a standard mic input signal.
Page 5-18 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 5.7.2.8 Sidetone 1. Apply a standard mic input signal. Measure com audio out and while transmitting, verify sidetone level is 1.4 Vrms 0.2 Vrms. 118.50 MHz ______ Vrms 127.50 MHz ______ Vrms 136.
400 SERIES MAINTENANCE MANUAL Page 5-19 P/N 190-00140-05 Rev. C 5.7.2.11 TX Interlock 1. Apply an 10 P V, 30% modulated, 1000 Hz RF signal. 2. Measure SNR at rated audio ( a 7.07 Vrms). Sensitivity Reading 1______ 3. Enable TX interlock line. 4. Measure SNR again.
Page 5-20 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 7. Adjust the RF level to 20 µV. 8. Verify the DMM reading is greater than the AGC reference voltage. DMM reading ________VDC (NLT AGC Reference Voltage) 9. Adjust the signal generator frequency to 127.
400 SERIES MAINTENANCE MANUAL Page 5-21 P/N 190-00140-05 Rev. C 11. Verify the DMM reading is greater than the reference AGC voltage. 127.002778 MHz ______VDC (NLT AGC reference voltage) 126.997222 MHz ______VDC (NLT AGC reference voltage) 12.
Page 5-22 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 5.7.2.17 Audio Frequency Response 1. With compression disabled, apply a 30% modulated, 1 mV signal to the unit. 2. Verify the audio output does not change more than 6 dB from 350 Hz to 2.
400 SERIES MAINTENANCE MANUAL Page 5-23 P/N 190-00140-05 Rev. C 5.7.2.19 Squelch Test Note: Opened squelch—Audio Closed Squelch—No Audio 1. Enable compressor (see Section 5.7.2). 2. Set the unit and the RF signal generator to 127.000 MHz, 30% modulated with a 1 kHz tone.
Page 5-24 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 5.7.2.20 Frequency Modulation FM deviation is to be measured with an average responding detector, which is RMS sine wave calibrated. The result is to be divided by 0.707 to yield the mathematical peak deviation.
400 SERIES MAINTENANCE MANUAL Page 5-25 P/N 190-00140-05 Rev. C 5.7.3 Navigation Receiver Final Tests 5.7.3.1 Voice/Ident Audio Output Level 1. Apply a standard audio test signal having a RF level of -93 dBm. 2. Select maximum audio (volume control turned fully clockwise), and turn off the ident filter.
Page 5-26 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 5.7.3.3 Voice/Ident Audio Distortion 1. Apply an input level from the RF generator of -79 dBm. 2. Modulate a standard VOR audio test signal at 350 Hz, 1000 Hz, and 2500 Hz (must be in IDENT mode to pass 1000 Hz tone).
400 SERIES MAINTENANCE MANUAL Page 5-27 P/N 190-00140-05 Rev. C 5.7.3.6 Receiver Quieting 1. Apply a -86 dBm RF level to the RF input. 2. Apply a Standard VOR Audio Test signal at 108.00 MHz. 3. Measure at the 500 : VOR/ILS AUDIO HI J6-16 and 500 : VOR/ILS AUDIO LO J6-17 outputs.
Page 5-28 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 5.7.3.9 VOR Flag Sensitivity A VOR/LOC +FLAG output voltage of greater than 260 mV fully conceals the indicator flag (‘HIDE’) and a VOR/LOC +FLAG output voltage of less than 125 m V fully reveals the indicator flag (IN VIEW).
400 SERIES MAINTENANCE MANUAL Page 5-29 P/N 190-00140-05 Rev. C 5.7.3.12 VOR Course Deviation Sensitivity 1. Apply a standard VOR deviation signal at 108.00 MHz, –103.5 dBm RF level to the RF input. at a radial of 160 degrees ‘FROM’. 2. Apply a Precision Test Selector or similar device at 150 degrees in course angle.
Page 5-30 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 5.7.3.16 Course Deviation Accuracy Test Apply a standard localizer deviation test signal, 90 Hz greater than 150Hz. Verify the deviation measured at VOR/LOC +LEFT with respect to VOR/LOC +RIGHT (VOR/LOC COMMON) is 90 mV r 9 m V.
400 SERIES MAINTENANCE MANUAL Page 5-31 P/N 190-00140-05 Rev. C 5.7.3.19 Spurious Response—VOR/LOC 1. Tune the VOR receiver to 117.95 MHz. 2. Verify the input signal level of an undesired image frequency of 77.
Page 5-32 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 5.7.4 Navigation Assembly I/O Tests 5.7.4.1 Localizer Course Deviation Test 1. Display the VOR/LOC/GS CDI Test Page (Figure 5-6).
400 SERIES MAINTENANCE MANUAL Page 5-33 P/N 190-00140-05 Rev. C 6. Verify the following output: TO/FROM (VOR/LOC +TO) ______(-225 r 75 mV) 7. Display HIDE. 8. Measure VOR/LOC +TO (J6-1) with respect to VOR/LOC +FROM (J6-2). 9. Verify the following output: TO/FROM (VOR/LOC +TO) ______ mV (0 mV r 5 mV) 5.
Page 5-34 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 5. Verify the VOR/LOC SUPER FLAG OUT output voltage with respect to ground is 0 r 250 mV (50 ohm load).
400 SERIES MAINTENANCE MANUAL Page 5-35 P/N 190-00140-05 Rev. C 5.7.4.9 NAV Serial DME Outputs Monitor the “VOR DISCRETE OUTPUTS” Test Page and verify that toggling the below listed outputs between their active and inactive states causes the output voltage on the appropriate line to switch between low (<.
Page 5-36 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 PAR DME 2 MHz Low____ High ____ (Input Switch must not be grounded for this test) PAR DME 4 MHz Low____ High ____ (Input Switch .
400 SERIES MAINTENANCE MANUAL Page 5-37 P/N 190-00140-05 Rev. C 5.7.5 Glideslope Final Tests 5.7.5.1 Glideslope Course Deviation Output Characteristic Test 1. Apply a standard course deviation input signal to the unit. 2. Measure GLIDESLOPE +UP (J6-32) with respect to GLIDESLOPE +DOWN (J6-31).
Page 5-38 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 5.7.5.4 Glideslope Superflag Output Test 1. Select flag ‘HIDDEN’. 2. Verify GLIDESLOPE superflag output voltage is not less than PWR_IN minus 1.5 V. GLIDESLOPE Superflag Output ______ (NLT Power_IN minus 1.
400 SERIES MAINTENANCE MANUAL Page 5-39 P/N 190-00140-05 Rev. C 5.7.5.6 Centering Accuracy 1. Apply a standard glideslope test signal to the unit. 2. Measure GLIDESLOPE +UP (J6-32) with respect to GLIDESLOPE +DOWN (GLIDESLOPE Common) (J6-31). 3. Verify the centering accuracy is 0 mV r 7.
Page 5-40 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 5.7.5.9 Nose Bandwidth 1. Apply standard glideslope test signal to the unit (-56dBm). 2. Find the AGC voltage and use it as a reference. 3. Vary the input signal frequency over the range of r 17 kHz from the assigned channel frequency.
400 SERIES MAINTENANCE MANUAL Page 5-41 P/N 190-00140-05 Rev. C 5.7.5.12 Status Tests 1. The following status bits shall be good with or without a standard glideslope test signal: GLIDESLOPE ROM_______OK GLIDESLOPE EEPROM _____OK GLIDESLOPE Synthesizer Lock__________OK 2.
Page 5-42 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 5.7.6 Main Board Final Tests GNC 420 versions 011-00506-10 or 011-00506-30, and GNS 430 versions 011-00280-10 or 011-00280-30 m ust be verified operational with dual power switch in both positions (1 and 2).
400 SERIES MAINTENANCE MANUAL Page 5-43 P/N 190-00140-05 Rev. C 5.7.6.4 Photocell 1. Turn the unit on in the test mode and verify brightness control is in photo mode, using the main lighting page. 2. With photocell uncovered, ensure display and keyboard backlight LED brightness is proper under normal conditions.
Page 5-44 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Figure 5-7. Main Lighting and Main Analog Test Pages B. Lighting Bus DC 1. Using the Main Lighting Test Page, change source to 14 VDC in both the DISPLAY and KEY fields. 2. Attach 12.0 VDC to unit pin J1-39.
400 SERIES MAINTENANCE MANUAL Page 5-45 P/N 190-00140-05 Rev. C 5.7.6.7 Display Pattern Test Starting from the display pattern test page, use the “RNG” buttons to cycle through all of the display patterns to verify all pixels are driven and color contrast is acceptable.
Page 5-46 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 1. Put the unit into Test Mode. 2. Turn the small right knob (CRSR) until you see the GPS Test Page (Figure 5-7). 3. Terminate GPS receiver into a 50 ohm load. 4. The “sgnl” number represents the receiver noise level.
400 SERIES MAINTENANCE MANUAL Page 5-47 P/N 190-00140-05 Rev. C Figure 5-9. Main CDI/OBS Configuration Test Page 5.7.6.13 MAIN Lateral LEFT, RIGHT Outputs Measure J1-21 (output) relative to J1-22 (output) [Load—333 ohms (three 1000 ohm loads) across J1-21 and J1-22].
Page 5-48 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 5.7.6.16 MAIN Lateral Flag Output Measure J1-23 relative to J1-24. Load—333 ohms (Three 1000 ohm loads) across J1-23 and J1-24. ‘HIDE’______ (+375 r 80 mV) IN VIEW ______ (0 r 25 mV ) 5.
400 SERIES MAINTENANCE MANUAL Page 5-49 P/N 190-00140-05 Rev. C 5.7.6.20 Annunciate Outputs Both the OBS and the AUTO outputs are switched by toggling the OBS selection on the Test Page.
Page 5-50 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 2. Measure at applicable pin. Load—Resistor to external voltage source such that it will source 275 mA when grounded. Note: applicable output will sink this current when active (18 ohms/2W when pulled up to 5V).
400 SERIES MAINTENANCE MANUAL Page 5-51 P/N 190-00140-05 Rev. C 5.7.6.22 Discrete Switch and Altitude Inputs For: INPUT NAME PIN ALTITUDE C4 (J1-61) ALTITUDE C2 (J1-62) ALTITUDE C1 (J1-63) ALTITUDE B4.
Page 5-52 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 5.7.6.23 ARINC 429 Transmitter and Receivers Unit outputs both HIGH and LOW speed signals at the same time in test mode while on the Main Status/Loopback Test Page, thus both speeds are tested simultaneously.
400 SERIES MAINTENANCE MANUAL Page 5-53 P/N 190-00140-05 Rev. C 5.7.6.24 RS232 Ports For: GPS RS232 OUT 1 (J1-56) GPS RS232 IN 1 (J1-57) GPS RS232 OUT 2 (J1-58) GPS RS232 IN 2 (J1-59) GPS RS232 OUT 3 (J1-41) GPS RS232 IN 3 (J1-42) GPS RS232 OUT 4 (J1-54) GPS RS232 IN 4 (J1-55) A.
Page 5-54 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 5.7.6.25 OBS The load used in the OBS test consists of a calibrated OBS resolver, Precision Track Selector or equivalent, and must be connected to the GPS OBS inputs. The OBS bearing must be consistent to within r 2 degrees of the bearing setting.
400 SERIES MAINTENANCE MANUAL Page 6-1 P/N 190-000140-05 Rev. C SECTION 6 PARTS AND ASSEMBLIES 6.1 INTRODUCTION This section lists major parts of the 400 Series. The part numbers listed in this section of the manual are given to aid in assembly and disassembly of the unit only, not for identifying orderable parts.
Page 6-2 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 GNC420/420A Table Part Description Unit P/N Figure 6-15 Sub-Assy, GNC420, 28V, Black 011-00506-00 7-5 6-16 Sub-Assy, GNC420, 14/28V, Blac.
400 SERIES MAINTENANCE MANUAL Page 6-3 P/N 190-000140-05 Rev. C Miscellaneous Parts Part Part Description Unit P/N Figure F600 Fuse, Submini, Axial, 7 Amp 350-00003-15 3-2 F850 Fuse, SMT, Fast, 5 Amp 350-B0500-01 3-1 F853 Fuse, 1206, 0.
Page 6-4 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 6.2.1 GNS 430/430A Tables Table 6-1. Sub-Assy, GNS 430, 28V, Black (Unit P/N 011-00280-00, Figure 7-1) Part Number Part Name Qty 011-0028.
400 SERIES MAINTENANCE MANUAL Page 6-5 P/N 190-000140-05 Rev. C Table 6-3. Sub-Assy, GNS 430, 14/28V, Gray (Unit P/N 011-00280-30, Figure 7-1) Part Number Part Name Qty 011-00281-04 Sub-Assy,CDU,GNS43.
Page 6-6 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Table 6-5. Sub-Assy GNS 430A, 28V, Gray (Unit P/N 011-00836-10, Figure 7-1) Part Number Part Name Qty 011-00281-04 Sub-Assy,CDU,GNS430,Gr.
400 SERIES MAINTENANCE MANUAL Page 6-7 P/N 190-000140-05 Rev. C Table 6-6. Main Chassis Assy, GNS 430, 14/28V (Unit P/N 011-00283-10, Figure 7-2) Part Number Part Name Qty 011-00474-01 Sub-Assy,GPS Mo.
Page 6-8 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Table 6-7. Main Chassis Assy, GNS 430, 14/28V, DO (Unit P/N 011-00283-30, Fig. 7-2) Part Number Part Name Qty 011-00474-01 Sub-Assy,GPS M.
400 SERIES MAINTENANCE MANUAL Page 6-9 P/N 190-000140-05 Rev. C Table 6-8. Main Chassis Assy, GNS 430, 28V (Unit P/N 011-00283-00, Fig. 7-2) Part Number Part Name Qty 011-00474-01 Sub-Assy,GPS Module,GNC TSOII 1 012-00214-03 PCB Assy,Comm,2.
Page 6-10 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Table 6-9. Main Chassis Assy, GNS 430A, 28V (Unit P/N 011-00283-20, Figure 7-2) Part Number Part Name Qty 011-00474-01 Sub-Assy,GPS Modu.
400 SERIES MAINTENANCE MANUAL Page 6-11 P/N 190-000140-05 Rev. C Table 6-10. Nav Chassis Sub-Assy, GNS 430/430A (Unit P/N 011-00282-00, Figure 7-3) Part Number Part Name Qty 012-00195-20 PCB Assy,Nav .
Page 6-12 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Table 6-11. Sub-Assy, CDU, GNS 430, Black (Unit P/N 011-00281-00, Figure 7-4) Bub Part Number Part Name Qty 1 011-00340-00 Sub-Assy,Inc .
400 SERIES MAINTENANCE MANUAL Page 6-13 P/N 190-000140-05 Rev. C Table 6-12. Sub-Assy, CDU, GNS 430, Gray (Unit P/N 011-00281-04, Figure 7-4) Bub Part Number Part Name Qty 1 011-00340-00 Sub-Assy,Inc .
Page 6-14 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Table 6-13. Sub-Assy, CDU, GNS 430A, Black (Unit P/N 011-00281-00, Figure 7-4) Bub Part Number Part Name Qty 1 011-00340-00 Sub-Assy,Inc.
400 SERIES MAINTENANCE MANUAL Page 6-15 P/N 190-000140-05 Rev. C Table 6-14. Sub-Assy, CDU, GNS 430A, Gray (Unit P/N 011-00281-04, Figure 7-4) Bub Part Number Part Name Qty 1 011-00340-00 Sub-Assy,Inc.
Page 6-16 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 6.2.3 GNC 420/420A Tables Table 6-15. Sub-Assy, GNC 420, 28V, Black (Unit P/N 011-00506-00, Figure 7-5) Part Number Part Name Qty 011-00.
400 SERIES MAINTENANCE MANUAL Page 6-17 P/N 190-000140-05 Rev. C Table 6-17. Sub-Assy, GNC 420, 14/28V, Gray (Unit P/N 011-00506-30, Figure 7-5) Part Number Part Name Qty 011-00281-05 Sub-Assy,CDU,GNC.
Page 6-18 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Table 6-19. Sub-Assy, GNC 420A, 28V Gray (Unit P/N 011-00837-10, Figure 7-8) Part Number Part Name Qty 011-00281-05 Sub-Assy,CDU,GNC420,.
400 SERIES MAINTENANCE MANUAL Page 6-19 P/N 190-000140-05 Rev. C Table 6-20. Main Chassis Assy, GNC 420, 28V (Unit P/N 011-00283-01, Figure 7-6) Part Number Part Name Qty 011-00474-01 Sub-Assy,GPS Module,GNC TSOII 1 012-00214-03 PCB Assy,Comm,2.
Page 6-20 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Table 6-21. Main Chassis Assy, GNC 420, 14/28V (Unit P/N 011-00283-11, Fig. 7-6) Part Number Part Name Qty 011-00474-01 Sub-Assy,GPS Mod.
400 SERIES MAINTENANCE MANUAL Page 6-21 P/N 190-000140-05 Rev. C Table 6-22. Main Chassis Assy, GNC 420, 14/28V, DO, (P/N 011-00283-31, Figure 7-6) Item Description Qty 011-00474-01 Sub-Assy,GPS Modul.
Page 6-22 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Table 6-23. Main Chassis Sub-Assy, GNC 420A, 28V (Unit P/N 011-00283-21, Figure 7-6) Part Number Part Name Qty 011-00474-01 Sub-Assy,GPS.
400 SERIES MAINTENANCE MANUAL Page 6-23 P/N 190-000140-05 Rev. C Table 6-25. Sub-Assy, CDU, GNC 420, Black (Unit P/N 011-00281-01, Figure 7-4) Bub Number Item Description Qty 32 011-00340-00 Sub-Assy,.
Page 6-24 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Table 6-26. Sub-Assy, CDU, GNC 420, Gray (Unit 011-00281-05, Figure 7-4) Bub Number Part Number Part Name Qty 32 011-00340-00 Sub-Assy,I.
400 SERIES MAINTENANCE MANUAL Page 6-25 P/N 190-000140-05 Rev. C Table 6-27. Sub-Assy, CDU, GNC 420A, Black (Unit P/N 011-00281-01, Figure 7-4) Bub Number Item Description Qty 32 011-00340-00 Sub-Assy.
Page 6-26 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Table 6-28. Sub-Assy, CDU, GNC 420A, Gray (Unit 011-00281-05, Figure 7-4) Bub Number Part Number Part Name Qty 32 011-00340-00 Sub-Assy,.
400 SERIES MAINTENANCE MANUAL Page 6-27 P/N 190-000140-05 Rev. C 6.2.4 GPS 400 Tables Table 6-29. Sub-Assy, GPS 400, 14/28V, Black (Unit P/N 011-00504-00, Figure 7-10) Part Number Part Name Qty 011-00.
Page 6-28 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Table 6-31. Main Chassis Assy, GPS 400 14/28V, (Unit P/N 011-00283-03, Figure 7-9) Part Number Part Name Qty 011-00474-01 Sub-Assy,GPS M.
400 SERIES MAINTENANCE MANUAL Page 6-29 P/N 190-000140-05 Rev. C Table 6-34. Sub-Assembly, CDU, GPS 400, Black (Unit P/N 011-00281-03), Fig 7-4) Bub Part Number Part Name Qty 1 011-00340-00 Sub-Assy,Inc Dec Push Switch 1 2 211-60232-06 Screw,2-56x.
Page 6-30 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Table 6-35. Sub-Assembly, CDU, GPS 400, Gray (Unit P/N 011-00281-06, Fig 7-4) Bub Part Number Part Name Qty 1 011-00340-00 Sub-Assy,Inc Dec Push Switch 1 2 211-60232-06 Screw,2-56x.
400 SERIES MAINTENANCE MANUAL Page 7-1 P/N 190-00140-05 Rev. C SECTION 7 ASSEMBLY DRAWINGS 7.1 INTRODUCTION This section contains assembly drawings to aid in assembly and disassembly of the 400 Series units. Part numbers and drawing notes can be used as reference information during disassem bly and assembly.
Page 7-2 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 GPS 400: x GPS 400 Assy Drawing (Dwg. No. 015-00504-XX, Rev. G, Figure 7-10) x Figure 7-9—Main Chassis Assembly, GPS 400 (Dwg.
400 SERIES MAINTENANCE MANUAL Page 7-3 (page 7-4 blank) P/N 190-00140-05 Rev. C Figure 7-1. Sub-Assy, GNS 430 (Dwg. No. 015-00280-XX, Rev. P).
400 SERIES MAINTENANCE MANUAL Page 7-5 (page 7-6 blank) P/N 190-00140-05 Rev. C Figure 7-2. Main Chassis Assy, GNS 430(A) (Dwg. No. 015-00283-00, Rev. R).
400 SERIES MAINTENANCE MANUAL Page 7-7 (page 7-8 blank) P/N 190-00140-05 Rev. C Figure 7-3. Nav Chassis Assy, GNC 400 (Dwg. No. 015-00282-00, Rev. K).
400 SERIES MAINTENANCE MANUAL Page 7-9 (Page 7-10 blank) P/N 190-00140-05 Rev. C Figure 7-4. GNC 4XX CDU Assy (Sheet 1 of 2) (Dwg. No. 015-00281-XX, Rev.
400 SERIES MAINTENANCE MANUAL Page 7-11 (Page 7-12 blank) P/N 190-00140-05 Rev. C Figure 7-4. GNC 4XX CDU Assy (Sheet 2 of 2) (Dwg. No. 015-00281-XX, Rev.
400 SERIES MAINTENANCE MANUAL Page 7-13 (page 7-14 blank) P/N 190-00140-05 Rev. C Figure 7-5. Sub-Assy, GNC 420 (Dwg. No. 015-00506-XX, Rev. N).
400 SERIES MAINTENANCE MANUAL Page 7-15 (page 7-16 blank) P/N 190-00140-05 Rev. C Figure 7-6. Main Chassis Assy, GNC 420(A) (Dwg. No. 015-00283-01, Rev.
400 SERIES MAINTENANCE MANUAL Page 7-17 (page 7-18 blank) P/N 190-00140-05 Rev. C Figure 7-7. Nav Chassis Assy, W/O Nav (Dwg. No. 015-00282-01, Rev. E).
400 SERIES MAINTENANCE MANUAL Page 7-19 (page 7-20 blank) P/N 190-00140-05 Rev. C Figure 7-8. Sub-Assy, GNC 420A (Dwg. No. 015-00837-XX, Rev. A).
400 SERIES MAINTENANCE MANUAL Page 7-21 (page 7-22 blank) P/N 190-00140-05 Rev. C Figure 7-9. Main Chassis Assy, GPS 400 (Dwg. No. 015-00283-03, Rev. J).
400 SERIES MAINTENANCE MANUAL Page 7-23 (Page 7-24 blank) P/N 190-00140-05 Rev. C Figure 7-10. Assy Dwg, GPS 400 (Dwg. No. 015-00504-XX, Rev. G).
400 SERIES MAINTENANCE MANUAL Page A-1 P/N 190-00140-05 Rev. C APPENDIX A GNC 420A AND GNS 430A A.1 DESCRIPTION This appendix describes version A of the GNC 420 and the GNS 430. The ‘A’ versions contain a 16 watt VHF Com Transmitter as opposed to a 10 watt transm itter.
Page A-2 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 The Com Voltage and Current requirements for the GNS 420A and GNS 430A are listed in Table A-2. Table A-2. Voltage and Current Supply Requirements Connector / Pin DC Voltage Tolerance(V) Max Current (DC) Conditions J2, Pins 11 & 12 +27.
400 SERIES MAINTENANCE MANUAL Page B-1 P/N 190-00140-05 Rev. C APPENDIX B CONNECTOR I/O DESCRIPTIONS B.1 I/O DESCRIPTION This appendix contains tables describing various I/O information used in the 400 Series. Table B-1. I/O Descriptions IO Code Description I INPUT O OUTPUT B BI-DIRECTIONAL B.
Page B-2 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Table B-2. Internal and External Connections (continued) INVERTER BOARD J13 Main Board J26 Display Module CCTF J27 Display Module Heater .
400 SERIES MAINTENANCE MANUAL Page B-3 P/N 190-00140-05 Rev. C Table B-3. J1 Descriptions (continued) AIRCRAFT POWER 20 I MAIN +LEFT 21 O MAIN +RIGHT (2.5V Common) 22 O MAIN LATERAL +FLAG 23 O MAIN LATERAL -FLAG (2.5V Common) 24 O MAIN +TO 25 O MAIN +FROM (2.
Page B-4 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Table B-3. J1 Descriptions (continued) GPS RS232 IN4 55 I GPS RS232 OUT1 56 O GPS RS232 IN1 57 I GPS RS232 OUT2 58 O GPS RS232 IN2 59 I A.
400 SERIES MAINTENANCE MANUAL Page B-5 P/N 190-00140-05 Rev. C B.3.3 J9 Table B-5. J9 Descriptions Pin Name Pin # I/O Description 12V 1 O 12 volt Supply to NAV board and G/S board from Main CPU board. 5V_NAV 2 O +5 volt Supply to NAV board and G/S board from Main CPU board.
Page B-6 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 B.3.5 J12 Table B-7. J12 Descriptions Pin Name Pin # I/O Description LD1 through LD8 46-50 3-5 O LOWER half display DATA output. CLK_ROW 6 O Pulse high for typically 310 ns at a period of 33.
400 SERIES MAINTENANCE MANUAL Page B-7 P/N 190-00140-05 Rev. C Table B-7. J12 Descriptions (continued) NOT USED 25 ROT_R_LRGA ROT_R_LRGB ROT_R_LRGC 64 26 27 I I I Rotor Right Large A to C are the contacts of a single pole triple throw switch. The common of the switch is ground.
Page B-8 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 Table B-8. J14 Descriptions (continued) 36 37 38 ROT_L_SMLC ROT_L_SMLB ROT_L_SMLA I I I Rotor Left Small A to C are the contacts of a single pole triple throw switch. The common of the switch is ground.
400 SERIES MAINTENANCE MANUAL Page B-9 P/N 190-00140-05 Rev. C B.3.7 J16 Table B-9. J16 Descriptions Pin Name Pin # I/O Description CS_MAPN 1 O Chip Select Map Not. Output pulses low ty pically for 240 ns when map is accessed. RDN 2 O Read Not. Output pulses low for typical times of 90, 150, and 210 ns, depending on wait states.
Page B-10 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 B.3.8 J17 Table B-10. J17 Descriptions Pin Name Pin # I/O Description FAN_HI 1 O Approx. 5 V. FAN_LO 2 O Used to switch fan off and on. B.3.9 P13 Table B-11. P13 Descriptions Pin Name Pin # I/O Description 12V 1 O 12 V dc output.
400 SERIES MAINTENANCE MANUAL Page B-11 P/N 190-00140-05 Rev. C B.4 COM BOARD CONNECTORS B.4.1 J2 Table B-12. J2 Descriptions Pin # Name I/O 1 RESERVED 2 COM IF AGC TEST O 3 SQUELCH / COMPRESSOR TEST .
Page B-12 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 B.4.2 J26 Table B-13. J26 Descriptions Pin # Pin Name I/O Description 1 +12 VDC I 2 -12 VDC I 3 + 5 VDC I 4 SERIAL_IN I Asynchronous serial input. 5 SERIAL_OUT O Asy nchronous serial output.
400 SERIES MAINTENANCE MANUAL Page B-13 P/N 190-00140-05 Rev. C Table B-14. J6 Descriptions (continued) 16 500 : VOR/ILS AUDIO HI O 17 500 : VOR/ILS AUDIO LO (GND) O 18 SERIAL DME CLOCK O 19 SERIAL DM.
Page B-14 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 B.5.2 J10 Table B-15. J10 Descriptions Pin # Pin Name I/O Description 1 +12VDC I 2 +5VDC I 3 GND I 4 -12VDC I 5 VLOC SERIAL IN I Serial input from the Main CPU board to the NAV Board. 6 KEY - This pin is not used.
400 SERIES MAINTENANCE MANUAL Page B-15 P/N 190-00140-05 Rev. C B.6 GLIDESLOPE BOARD CONNECTORS B.6.1 J25 Table B-17. J25 Descriptions Pin # Pin Name I/O DESCRIPTION 1 +12VDC I 2 +5VDC I 3 GND I Ground. 4 -12VDC I 5 G/S IF AGC O The IF AGC output. 10K output impedance.
Page B-16 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 B.8 INVERTER BOARD CONNECTORS B.8.1 J13 Table B-18. J13 Description Pin # Pin Name I/O Description 1 12V I 11 to 14 V dc. 2 CCFT_TA_NOT I Cold Cathode Transmit A Not input. Occurs at 58.5 kHz and is active low.
400 SERIES MAINTENANCE MANUAL Page B-17 P/N 190-00140-05 Rev. C B.8.3 J27 Table B-20. J27 Description Pin # Pin Name I/O DESCRIPTION 1 HEATER VIN O Heater high. The heater typical resistance is 16 ohms. 2 HEATER GND I Heater low. B.9 GPS MODULE CONNECTORS B.
Page B-18 400 SERIES MAINTENANCE MANUAL Rev. C P/N 190-00140-05 B.11 DISPLAY MODULE CONNECTORS B.11.1 J22 See LCD Flex description (J12). B.12 DATA BASE CARD CONNECTORS J20 and J21 are the Data Base Card Connectors. B.13 MAP BOARD CONNECTORS B.13.1 P16 Table B-22.
Ein wichtiger Punkt beim Kauf des Geräts Garmin GNC 420 (oder sogar vor seinem Kauf) ist das durchlesen seiner Bedienungsanleitung. Dies sollten wir wegen ein paar einfacher Gründe machen:
Wenn Sie Garmin GNC 420 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 Garmin GNC 420 - auf diese Weise prüfen Sie, ob das Gerät Ihren Wünschen entspricht. Wenn Sie tiefer in die Benutzeranleitung von Garmin GNC 420 reinschauen, lernen Sie alle zugänglichen Produktfunktionen kennen, sowie erhalten Informationen über die Nutzung. Die Informationen, die Sie über Garmin GNC 420 erhalten, werden Ihnen bestimmt bei der Kaufentscheidung helfen.
Wenn Sie aber schon Garmin GNC 420 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 Garmin GNC 420 verkürzen könnten.
Jedoch ist die eine der wichtigsten Rollen, die eine Bedienungsanleitung für den Nutzer spielt, die Hilfe bei der Lösung von Problemen mit Garmin GNC 420. Sie finden dort fast immer Troubleshooting, also die am häufigsten auftauchenden Störungen und Mängel bei Garmin GNC 420 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.
