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Only for training and service purposes
4. TROUBLE SHOOTING
GS290 Operational Description Revision B
LG Electronics
75/136
LGE Property
START
Input Signal is
Good(C364,C365
) ?
Output Signal is
High(C343,C342)
?
Replace Main Board
Replace Audio
AMP(U304)
Check Speaker ‘s
Combination with PCB.
Yes
Connect Speaker
completely.
No
No
Yes
No
Yes
Assemble