LG KG280 Service Manual - Page 65
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4. TROUBLE SHOOTING CHECKING FLOW START Check the audio signals of U204.A7 and U204.B7. Is that OK? No Replace U204 or Change the main board Yes Check the audio signals No of U200.3 and U200.9. Yes No Is the voltage level of U200.4 high? Yes Check the soldering of U200 Check the U101 or Change the main board. Check the state of contact of speaker No Replace speaker Yes Speaker Working well!! LGE Internal Use Only - 66 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 66 -
Speaker
Working well!!
START
Check the state of
contact of speaker
Yes
Check the audio signals
of
U200.3 and U200.9.
No
Yes
Is the voltage level
of U200.4
high?
Replace speaker
No
No
Check the U101 or
Change the main
board.
Yes
Check the audio signals
of
U204.A7 and U204.B7.
Is that OK?
No
Yes
Replace U204 or
Change the main board
Check the soldering
of U200
CHECKING FLOW