Speaker No Audio Output - LG CM2760 Service Manual

2. SPEAKER NO AUDIO OUTPUT

No audio output problem occurs when you power on the unit.
2-1. NO SOUND
2-1-1. Solution
Reassemble AMP IC heat-sink, replace IC202.
2-1-2. How to troubleshoot (Countermeasure)
1) Reassemble AMP IC heat-sink (heat-sink screw must be assembled tightly).
2) Still NG, please check Q409, Q407, Q408 part out, if it is not appear 12 V.
3) If it is not appear 12 V, check IC202 pin48 output, is a high level.
4) If not high voltage, check whether IC202 damage, flash is lost.
2-1-3. Service hint (Any picture/ Remark)
ONE POINT REPAIR GUIDE
Q408 Q408
Q407 Q407
< MAIN board top view >
3-3
IC202 IC202