LG GD310 Service Manual page 77

5. TROUBLE SHOOTING
Speaker contact
C107
C106
LGE Internal Use Only
START
Check Speaker 's
Contacts are clear.
Yes
Input Signal is
High(C217,C218
) ?
Yes
Output Signal is
High(C226,C227
)?
Yes
Pin33,32 of sub
board
Connector
(CN103) is
Yes
C103,C102 of
FPCB_Folder
are High?
Yes
Assemble
No
Resolder/Replace
Speaker
No
Replace Main Board
No
Replace Audio
AMP(U201).
No
Replace FPCB LCD
No
Replace
FPCB_Folder
- 78 - Copyright © 2009 LG Electronics. Inc. All right reserved.
C238
C247
U201
Only for training and service purposes