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LG S75A1-D - One Point Repair Guide; If There Is no Sound or Have a Problem on Lcd; ELECTRICAL Troubleshooting

LG S75A1-D
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2-2
ONE POINT REPAIR GUIDE
1. IF THERE IS NO SOUND OR HAVE A PROBLEM ON LCD.
1-1. IC601 (NO 12 V)
1-1-1. Solution
Replace IC601 on AMP board.
1-1-2. How to troubleshoot (Countermeasure)
1) Please, check 25 VA of IC601 pin2 (VIN).
2) If 25 VA is abnormal, check the parts (L603, F601, JK600). And, change the weird one.
3) If 25 VA is OK, check PWR_CTRL (R614).
If it is not high state, follow the stage 9-1 (IC100).
If it is high state, please replace IC601.
1-1-3. Service hint (Any picture / Remark)
< AMP board top view >
IC601
IC601

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