LG SPH4B-W Service Manual

4-2
Copyright © 2021 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
ONE POINT REPAIR GUIDE
1. NO POWER PROBLEM (PVDD)
No power problem occurs when you power on the unit
1-1. Solution
If you check these points and find PVDD voltage is not checked, replace woofer SMPS board.
1-2. Service hint (Any picture / Remark)
< Woofer AMP board bottom view >
< Woofer AMP board top view >
PVDD
PVDD
pin3, 4, 5, 6 at WCN601
pin3, 4, 5, 6 at WCN601
PVDD
PVDD
pin7 at WIC606
pin7 at WIC606
Nearby WC610
Nearby WC610
PVDD
PVDD
pin7 at WIC607
pin7 at WIC607
Nearby WC686
Nearby WC686
PVDD
PVDD
at WCA601
at WCA601

LG SPH4B-W Specifications

General

Brand	LG
Model	SPH4B-W
Category	Speaker System
Language	English