NX700/NX700E
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TROUBLE SHOOTING
General
NO POWER AUDIO OUTPUT TROUBLE (RADIO MODE)
CHECK ITEM CHECK POINT CHECK ITEM CHECK POINT
1 POWER SUPPLY WIRE CONNECTIONS
1 AUDIO OF TUNER IC PINS 8 AND 9 OF IC101(TUNER IC)
FUSE
C220,C221
CONNECTORS 2 AROUND IC101(TUNER IC)
BATTERY
2 4V POWER SUPPLY 4V STB
AUDIO OUTPUT TROUBLE (CD/DVD MODE)
Q634,IC602
CHECK ITEM CHECK POINT
3 OSCILLATION OF X501 X501 1 I2S CONNECTION OF DVD MECHANISM
4 RESET IC IC506 FPC, J401
5 B/U-6V-DET IC504,R580,R587
2 AROUND IC200(DAC)
6 B/U-9V-DET2 IC505,Q501
7 ACC-DET IC505,Q502,Q503
AUDIO OUTPUT TROUBLE (AUX1)
8 SYSTEM CONTROLLER(IC503)
CHECK ITEM CHECK POINT
1 RCA CONNECTION OF RCA
KEY OPERATION TROUBLE
CONNECTORS
CHECK ITEM CHECK POINT 2 INPUT OF IC209(E-VOL) AROUND IC205(AUX1 GAIN)
1 KEY CONDITION KEYS
3 AROUND IC209(E-VOL)
2 SWITCH CONDITION SWITCHES
3 INPUT OF IC503 J901(PANEL-B),FPC,J105(PANEL-A)
4 SYSTEM CONTROLLER(IC503)
RADIO TROUBLE
CHECK ITEM CHECK POINT
1 ANTENNA CONNECTION OF ANTENNA
2 SEEK AROUND IC101(TUNER IC)
3 AV8.5V POWER SUPPLY Q620,Q621
AUDIO OUTPUT TROUBLE (NAVI GUIDE)
4 OUTPUT OF SIGNAL PINS 8 AND 9 OF IC101
CHECK ITEM CHECK POINT
(AUDIO SIGNAL)
1 CONNECTION CONNECTIONS
5 AUDIO LINE
CONNECTORS
FRONT SPEAKER
Audio
2 INPUT OF IC209(E-VOL) AROUND IC207(NAVI+/-)
AUDIO OUTPUT TROUBLE (SPEAKER AND LINE OUT)
3 AROUND IC209(E-VOL)
CHECK ITEM CHECK POINT
1 OFFSET DET CONNECTION OF SPEAKERS
Radio
INPUT DC OF IC601(POWER IC)
RADIO DOES NOT WORK
2 AV8.5V POWER SUPPLY Q620,Q621
CHECK ITEM CHECK POINT
3 E-VOL IC209(E-VOL), IC503
1 AUDIO8.5V L108,L109(VCC LINE)
4 AUDIO-GND AUDIO-GND LINE
2 LINE OF TUNER R106,R107,
5 OUTPUT OF E-VOL PINS 12,13,14,19,20 AND 21 OF
L222,L223
IC209(AUDIO LINE)
3 TUNER IC(IC101)
6 MUTE Q203,Q204,Q205,Q206,Q207,
Q208,Q209,Q210
RECEIVE/SEEK TROUBLE
7 SYSTEM CONTROLLER(IC503)
CHECK ITEM CHECK POINT
1 ANTENNA
CONNECTION OF ANTENNA
AUDIO OUTPUT TROUBLE (SPEAKER)
2 GUARD OF ANT AMP-REM,A-ANT LINE
CHECK ITEM CHECK POINT
CURRENT CONSUMPTION
1 SPEAKER CONNECTION OF SPEAKERS
3 AUDIO8.5V L108,L109(VCC LINE)
2 AMP-STB,AMP-MUTE IC601(POWER IC)
4
READING OF PARAMETER
IC503(SYSTEM),IC507(E2PROM)
3 INPUT SIGNAL IC601(POWER IC)
5 PARAMETER READJUST
4 AUDIO LINE(C324,C325,C326,C327)
6 TUNER IC(IC101)
AUDIO OUTPUT TROUBLE (LINE OUT)
CHECK ITEM CHECK POINT
1 AMP-REM CONNECTION OF AMP-REM
2 GUARD OF REM AMP-REM,A-ANT LINE
3 RCA CONNECTION OF RCA
4 AUDIO-GND GND OF EXTERNAL AMP
CURRENT CONSUMPTION
5 EXTERNAL AMP
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