Portable Function - LG MBD-D102X Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART

7. PORTABLE FUNCTION

Portable function
YES
Check if JK305 contacts with
YES
Check IC200
(BU4052) 4, 11PIN input
waveform.
YES
Check IC200 (BU4052)
3, 13PIN output waveform.
YES
Check IC801
(MC4580) 2, 6PIN input
waveform.
YES
OK
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.
3-7
NO
,
DD
power.
YES
NO
,
SS
power.
YES
Check u-COM (IC100)
3, 69PIN communication.
Refer to SMPS
Troubleshooting.