Service manual

 LCD DEFECTS (BACK LIGHT DEFECTS & CONTRAST READJUSTMENT)
- CHANGE DAMAGED C21,X1 OF V-895.
- CHANGE LCD FCC CONNECTING DAMAGED CABLE
- CHANGE LCD
 KEY ERROR
- CHANGE FRONT SWITCH.
 WHEN THERE ARE NOISES IN ENGINE OPERATING
> ENGINE'S ELECTRONIC NOISE CAN AFFECT RADIOTELEGRAPH
- CHANGE THE ROUTE OF POWER CABLE FROM ENGINE
- ADD NOISE FILTER TO POWER CABLE
- USE PROTECTIVE IGNITION PLUG WIRING OR ALTERNATING CURRENT
GENERATOR NOISE FILTER
 WHEN THERE ARE POWER ERROR MESSAGES
- POWER VOLTAGE IS TOO LOW, OR TOO HIGH.
- CHECK BATTERY VOLTAGE. THIS SHOULD BE DC 13.6V(±10%).
- CHECK SHIP'S ALTERNATING CURRENT GENERATOR.
- CHECK R15 DEFECTS OF V-895 & CHANGE.
 WHEN NO POSITION INFORMATION IS DISPLAYED
- THIS CAN BE GPS CABLE DEFECTS OR GPS SETTING MAY BE INCORRECT.
- CHECK IF GPS CABLE IS PHYSICALLY CORRECTLY.
- CHECK THE POLARTITY OF GPS CABLE.
- IF POSSIBLE, CHECK THE BAUD RATE SETTING OF GPS. SET BAUD RATE
SHOULD BE 4800.
- PARITY SHOULD BE SET AT "NONE".
- CHECK U2 DEFECTS OF V-895 & CHANGE.
Tx
TxTx
Tx
MEASURE MEASURE CONDITION PART VALUE POSITI
ON