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4. TROUBLE SHOOTING
CHECKING FLOW
START
Check the audio signals
of U204.A7 and U204.B7.
Is that OK?
Yes
Check the audio signals
of U200.3 and U200.9.
Yes
Check the state of
contact of speaker
Yes
Speaker
Working well!!
LGE Internal Use Only
No
Replace U204 or
Change the main board
No
Is the voltage level
of U200.4 high?
Yes
Check the soldering
of U200
No
Replace speaker
- 66 -
No
Check the U101 or
Change the main
board.
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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