LG SPK5B-W Service Manual

3-5
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
ONE POINT REPAIR GUIDE
NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE OR
“HELLO” ON FRONT PANEL
When you turn on your set, it will blank / no message on front panel, and stand-by LED doesn’t work.
1-2. IC301 System 3.3 V (No 3.3 VA)
1-2-1. Solution
Replace MAIN/ FRONT board.
1-2-2. How to troubleshoot (Countermeasure)
1) Please check 3.3 VA of IC301 pin3.
2) If 3.3 VA is abnormal, replace MAIN board.
3) If 5.1 VA is OK, replace FRONT board.
1-2-3. Service hint (Any picture / Remark)
< MAIN board top view >
IC301
IC301
L301
L301
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LG SPK5B-W Specifications

General

Brand	LG
Model	SPK5B-W
Category	Speaker System
Language	English