LG SPH7B-W User Manual

3-4
ONE POINT REPAIR GUIDE
3. IF THE SET DOESN’T BOOTING WHEN YOU TURN ON THE SET.
3-1. IC306 (NO VCC_5V)
3-1-1. Solution
Replace IC306 on MAIN board.
3-1-2. How to troubleshoot (Countermeasure)
1) Please, check 5.1 VA of IC306 pin1 (VIN).
2) If 5.1 VA is abnormal, follow the stage 2-1 (IC300).
3) If 5.1 VA is OK, check PWR_CTRL (R363).
If it is not high state, follow the stage 9-1 (IC100).
4) If it is high state, please replace IC306.
3-1-3. Service hint (Any picture / Remark)
< MAIN board bottom view >
IC306
IC306

LG SPH7B-W Specifications

General

Brand	LG
Model	SPH7B-W
Category	Speaker System
Language	English