LG MDV902 Service Manual page 26

MIC
YES
CN307
5PIN "MIC-SIGNAL"
CHECK
YES
DVD
PCB IC408 3PIN SIGNAL
CHECK
YES
DVD PCB
IC408 OUTPUT 1PIN SIGNAL
CHECK
YES
DVD
PCB IC501 125, 126PIN
CHECK
YES
DVD PCB
IC407 3,4,5,6PIN MODUALATION
CHECK
YES
DVD PCB
IC407 OUTPUT 18,19,14,15PIN
OUTPUT CHECK
YES
DVD PCB
IC406 INPUT 5, 6, 2, 3PIN
CHECK
YES
DVD PCB
IC406 OUTPUT 1, 7PIN
CHECK
YES
DVD
PCB CN709 7, 8PIN
CHECK
YES
MAIN PCB IC601 44PIN CHECK
YES
IC601 (NJW1190)
TROUBLESHOOTING CONFIG
NO
IC302 65PIN
MIC-SENSE CHECK
IC402
8PIN SIGNAL INPUT
CHECK
IC402 7PIN SIGNAL OUTPUT CHECK
IC402 2PIN SIGNAL INPUT CHECK
IC402 3PIN SIGNAL OUTPUT CHECK
NO
BETWEEN DVD PCB IC408
AND CN307 PATTERN CHECK
IC408
NO
VOLTAGE CHECK 8PIN(+12V),
4PIN(-12V)
CHANGE IC408
NO
BETWEEN IC408 1PIN AND IC501
125, 126 PATTERN CHECK
NO
DVD TROUBLESHOOTING
CONFIG
3-8
NO
YES
NO
YES
YES
YES
NO
YES
JK401, JK402 CHECK
YES
JK401,JK402 4PIN OUTPUT CHECK
YES
IC402 6PIN "+10.4V " CHECK
CHECK +12V AND
-12V VOLTAGE LINE