Portable Function - LG MBD62I 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
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Only for training and service purposes
Check IC200
NO
(BU4052) 16PIN V
8PIN V
SS
YES
Replace the related parts
Check IC801
NO
(MC4580) 4PIN V
8PIN V
DD
YES
Replace the related parts.
3-7
NO
,
DD
power.
NO
,
SS
power.
Check u-COM (IC100)
3, 69PIN communication.
Refer to SMPS
Troubleshooting.
LGE Internal Use Only