LG LAS855M - SOUND from the R Ch SPEAKER

2-10
ONE POINT REPAIR GUIDE
9. NO SOUND FROM THE R ch SPEAKER.
9-1. IC7000 (NO 25 VA / 12 V)
9-1-1. Solution
Replace IC7000 on AMP board.
9-1-2. How to troubleshoot (Countermeasure)
1) Please check C7003 for 25 VA of IC7000, 12 V of R7000.
 If 25 VA is abnormal, check the parts (L603, F601, JK600). And change the weird one.
 If 12 V is abnormal, follow the stage 1-1 (IC601).
2) If 25 VA and 12 V are OK, but no sound from the speaker, check PWM1, 2 signals (R609, R611, R612, R613).
3) If their signals are OK, follow the stage 6-1 (IC307).
4) If it is OK, check PWR_RST signal (R604), It should be high.
5) If there is no problem, check frequency of X600 (24.576 MHz).
6) If it is OK, check I2S signals (R618, R619, R620).
 If it is OK, replace IC600.
 If it is abnormal, follow the stage 12-1 (IC503, IC504).
7) If it is OK, replace IC7000.
9-1-3. Service hint (Any picture / Remark)
< AMP board top view >
IC7000
IC7000