LG XC102, Service Manual

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3-1
AUDIO ELECTRICAL TROUBLESHOOTING GUIDE
SECTION 3 AUDIO PART ELECTRICAL
1. POWER (SMPS)
POWER (SMPS)
OK
YES
YES
YES
Replace IC 901,902
Check IC901, 902
Check the fuse
F901
NO NO
NO
YES
Check short of
P9701, P9702 line
Replace the fuse
Check
the DC V of C905.
If DC V is over
400V
NO
Check BD901, LF901, 902
Check the
DC V of C981, C945.
If DC V is 6.1V
NO
Check short of P9702 line
YES
YES
Chcek the
DC V of C950, C951
If DC V is in
31.5V
NO
Check short of P9701 line
Chcek the
DC V of C909, C903,
C921 If DC V is in 14~19V
and it is steady.
YES