4. TROUBLE SHOOTING
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
High?
Yes
C103,C102 of
FPCB_Folder
are High?
Yes
Assemble
- 76 -
No
Resolder/Replace
Speaker
No
Replace Main Board
No
Replace Audio
AMP(U201).
No
Replace FPCB_LCD
No
Replace
FPCB_Folder
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Only for training and service purposes