Analog Audio L/R Output - LG BD630N Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE
7. NO ANALOG AUDIO L/R OUTPUT
No analog L/R audio output
YES
Is there
signal audio L/R on IC801
pin2, 6?
YES
Is there
signal audio L/R on IC801
pin1, 7?
YES
Is there
signal audio L/R on R834,
R836 & R835,R837?
YES
Check JK802 and RCA cable connection.
Check
NO
IC501 MT8550L BAG Vcc or
replace IC501 MT8550L BAG.
NO
IC801 pin3, 5
Vcc 5 V OK?
IC801 pin8
Vcc 10 V OK?
Replace IC801.
NO
Check AMUTE control
from IC501 MT8550L BAG Vcc.
3-52
NO
YES
NO
YES
Check Vcc 5 V
on SMPS board.
Check Vcc10 V
on main board.