Section 3. Electrical Part - LG MICRO Hi-Fi SYSTEM Service Manual

SECTION 3. ELECTRICAL PART

AUDIO ELECTRICAL TROUBLESHOOTIHG GUIDE
1. POWER (SMPS)
POWER (SMPS)
YES
Check the fuse
F901
YES
Check
the DC V of C905
if DC V is over
400V
YES
Check the
DC V of C909,C903,C921
If DC V is in 14~19V
and it is steady
YES
Check the
DC V of C981,C945.
If DC V is 6.1V
YES
Check the
DC V of C950,C951
If DC V is in
26V
YES
OK
NO
Replace the fuse
NO
Check BD901, LF901, 902
NO
Check IC901, 902
YES
Check short of P9701, P9702 line
NO
Check short of P9702 line
NO
Check short of P9701 line
3-1
NO
Replace IC901, 902