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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
LGE Internal Use Only
Can you hear sound from
speaker ?
Yes
CHECKING FLOW (Woofer)
Check spk module or change.
No
Can you see the AC waveform?
(Check L201,L202 Pad.)
1
st
: Resolder L201, L202
2
nd
: Resolder CN201
1st : Resolder : C201, C203,
R203, R206
2
nd
: Resolder : U201
Yes
Can you hear sound from
Earphone ?
Can you see the AC waveform?
(Check C228,C232 Pad.)
1
st
:Resolder C202, C204, R204
, R207,C217
2
nd
: Resolder : U202, U205
Resolder U103
Or Change Main Board.
No
No
Speaker
Working well!!
Yes
Yes
No