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4. Troubleshooting 

18

 

NG 

Power-up Self test? 

Yes 

Defective NP Board 

Flow 5 

OK 

Single key is 

defective? 

No 

All Keys? 

Defective NP Board 

Defective key switch on PNL Board 

Yes 

Check keys for row and column wirings, 
using the key matrix below, U20 on NP 
Board is defective, if wiring is okay. 

Symptom: No key response 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 4.6 Key matrix 

Sig. KS3 

KS2 

KS1 

KS0 

KR0 

PLOT 

ON/OFF 

+/

!

 

EVENT 

MOB 

 

KR1 GOTO 

CLEAR 

NU/CU 

ENT 

 

KR2 

WPT 

RTE 

TONE 

MENU 

ESC 

 

KR3 MARK  CENTER 

DISPLAY 

SEL 

 

KR4 

 

 

 

 

 

 

 

 

 

Summary of Contents for GP-90

Page 1: ...GPS NAVIGATOR GP 90 90 DUAL Back...

Page 2: ...4200 0798 65 4200 FIRST EDITION FIRST EDITION NOV NOV 2003 2003 Printed in Japan Printed in Japan All rights reserved All rights reserved PUB No PUB No SME 44270 A SME 44270 A 00014894400 00014894400...

Page 3: ...mper Setting 7 3 3 Battery Replacement 8 4 Troubleshooting 4 1 Error Messages 10 4 2 LED Status 10 4 3 Selftest 10 4 4 Troubleshooting Flow Chart 13 5 Communication with PC 5 1 Connection 19 5 2 Setti...

Page 4: ...antenna cable carries 5 V to power the preamplifier The GPS signal received by the antenna is delivered to the GPS board GN 8091 The GPS board selftest cannot detect the short circuit on the antenna...

Page 5: ...act closure signal if selected 8 Producing following voltages 5 V for digital circuit and internal beacon receiver 12 V for flash memory and analog circuit 20 5 V LCD drive voltage 210 Vac for LCD bac...

Page 6: ...5 RAM 2 Mbit CG ROM 4 Mbit VIDEO RAM 3 Mbit 6 2 MHz Address Data ACRTC U5 Key Data Picture Data Lat Long SPD CRS Time Date etc 5 V GPS INITIAL SETTING U12 U13 U21 U27 U14 U24 U25 U26 CFL Regulator Con...

Page 7: ...hes the data of the line immediately above 14 D0 Display data 1 4 GP 90 DUAL GP 90 DUAL consists of two GPS receivers and an interface unit IF 2500 The GPS receiver for dual configuration differs from...

Page 8: ...Fig 2 3 Front panel without LCD PNL Board 20P8148 Fig 2 2 Front panel rear view LCD EW50136DW Fig 2 1 GP 90 Display unit Beacon receiver GR 7000A Optional Power supply circuit 4A Fuse NP Board 20P8188...

Page 9: ...and 5 V are adjusted by R34 and R84 respectively as shown in Table 3 1 Table 3 1 Adjusters on NP board Test points Adjuster Rating Gate of Q16 and GND R80 R34 82 3 to 84 3 KHz J2 3 and J2 5 R84 5 07 V...

Page 10: ...oard Jumper Connected Removed JP1 BAT Normal operation Battery replacement JP2 EMU Not used Not used JP3 BEACON Not used Not used JP4 NMEA Not used When JP5 is connected JP5 LOG Log pulse from DATA 3...

Page 11: ...Use a desoldering tool to remove the battery from NP board 3 Solder the replacement battery onto the board 4 Fix the battery onto the board with silicone sealant 5 Solder JP1 CAUTION 1 Replace the ba...

Page 12: ...3 Maintenance 9 Lithium Battery Type CR2450 F2ST2L Code 000 144 941 Fig 3 5 NP Board 20P8188 Soldering side...

Page 13: ...ny error 1 Replace GN 8091 board Disconnection between GN 8091 and NP board does not generate this message 4 2 LED Status CR7 on NP board indicates the status of MPU U16 Table 4 2 LED Board Parts No R...

Page 14: ...U16 Q14 U28 R71 6 DATA 4 PORT Receiving output data with short connector U23 SIO U16 U29 RS 232C U30 RS 422 R97 R98 7 GPS Selftest of GN 8091 See next page for details GN 8091 8 BEACON Receiving rece...

Page 15: ...20 ROM Error RAM Error and RTC Error 27 ROM Error and RAM Error 07 ROM Error BACK UP MEMORY Error and RTC Error 33 ROM Error and BACK UP MEMORY Error 13 RAM Error BACK UP MEMORY Error and RTC Error 3...

Page 16: ...4 Troubleshooting Flow Chart Start Press Power Switch Power Flow chart 1 Position fix DGPS 2D 3D mode Normal display Key operation End No Yes No No No No Flow chart 2 Flow chart 3 Flow chart 4 Flow c...

Page 17: ...linking Neither 5 V nor 12 V on J2 Defective regulator U8 PQ09RA1 Defective power supply circuit on NP Board 5 V and 12 V is normal on J2 Open circuit between 19 and 20 of J9 Symptom Fails to power Su...

Page 18: ...circuit Position fix Wrong initialization Defective keep alive battery Defective GN 8091 OK Change antenna 1 Defective antenna connector or cable 2 Defective power supply circuit on 20P8188 No Defecti...

Page 19: ...ratio 1 to 4 dB Defective beacon antenna or defective beacon receiver Signal strength 30 dB SN ratio less than 7 dB StationIDisOK Menu 7 Blank Out of beacon signal coverage area or poor grounding of...

Page 20: ...utput from J4 on NP Board Dark about 200 VAC Defective LCD unit Light Key beep No picture Defective NP Board 0 VAC See Flow 5 No Key beep Key beep Output from J10 on NP Board Abnormal Defective NP Boa...

Page 21: ...ard Defective key switch on PNL Board Yes Check keys for row and column wirings using the key matrix below U20 on NP Board is defective if wiring is okay Symptom No key response Table 4 6 Key matrix S...

Page 22: ...00 bps 2 On PC DATA length 8 bits Parity bit Non parity Stop bit 1 bit Control XON XOFF control 5 3 DATA Transfer 1 From GP 90 to PC Waypoint data route data and end code are output from GP 90 to the...

Page 23: ...ude 2 N S 3 Longitude 4 E W 5 Waypoint number 1 to 1131 6 Waypoint color 1 red 2 green 4 cyan 5 purple 6 blue 7 white 7 Comment 2 bites for mark shape 12 bites for comment 8 Waypoint graph on off 9 Ti...

Page 24: ...00 points 3 MOB M Not output 1 point 4 When WPs entered by using cursor are saved as routes 0202 to 1131 900 points 5 Destination selected by using cursor 0202 to 1131 6 When WPs entered by using curs...

Page 25: ...6 1 Number of route data which was transmitted 1 to 3 2 Number of data which are being transmitted 1 to 3 3 Message mode C W only C is valid 4 Route number Up to 4 digits 1 to 30 5 Waypoint number Up...

Page 26: ...disk into the slot on the PC The program disk contains five files Choice COM GP 90bug bin Load all bin Up bat Uppg exe 3 Turn on the PC 4 Type up and press Enter key or double click up bat The PC scr...

Page 27: ...RS 232CTxD RxD 3 TxD 5 S G 6 GND 7 MT 08 D SUB 3 5 4 6 1 RS 232CRxD 4 GND 6 2 Using MT 08 DATA 4 port on GP 90 is connected to MT 08 as below 6 3 DIP Switch Setting DIP switches in MT 08 are set as be...

Page 28: ...ing Green left blinking Yellow right on MT 08 ready to communicate Turn on GP 90 When the communication with MT 08 is succeeded three beep sounds are heard GP 90 goes into normal function with a signa...

Page 29: ...CONNECT EXTERNAL DGPS BEACON RECEIVER OR PC REMOTE EVENT SWITCH MOB Man Over Board SWITCH 2 1 TNC P 3 NJ TP 3DXV 1 1m 5 3 N P 8DFB 0 2m ANTENNA UNIT GPA 017S GPA 019S GPA 018S W 1 2m WHIP TNC J 3 3 TN...

Page 30: ...J10 XH3P RED BRN 1 24VDC DPYC 1 5 1 IEC61162 2 OR NMEA0183 V2 0 RS 422 24VDC DPYC 1 5 1 MJ A6SPF0012 10m USE MJ A6SPF0012 10m W CONNECTOR WHEN TERMINAL BOARDS ARE NOT USED GP 90 DUAL GP 90 DUAL T NISH...

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