Tv-Audio Function - LG MBD-D102X Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART

8. TV-AUDIO FUNCTION

TV-Audio function
YES
Check Video out
YES
Check Audio in
YES
Check IC200
(BU4052) 5, 14PIN
input waveform
YES
Check IC200
(BU4052) 3, 13PIN
output waveform
YES
Check IC801
(MC4580) 2, 6PIN
waveform
YES
OK
NO
Check SW4S1
Check IC200
NO
(BU4052) 16PIN V
8PIN V
SS
Replace the related parts.
Check IC801
NO
(MC4580) 4PIN V
8PIN V
DD
Replace the related parts.
3-8
NO
,
DD
power
YES
NO
,
SS
power
YES
Check u-COM
3, 6PIN communication
Refer to SMPS
Troubleshooting.