LG SJ8S Service Manual

3-7
Copyright © 2017 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
ONE POINT REPAIR GUIDE
PRIMARY UNIT
NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE OR “HELLO” ON
FRONT PANEL
1-3. LCD System power 5 V, 3.3 VA (No 5 V, 3.3 VA)
1-3-1. Solution
Replace FRONT or MAIN board.
1-3-2. How to troubleshoot (Countermeasure)
1) Please check 5 V (pin1 ~ 2), 3.3 VA (pin11 ~ 12) of CN103.
2) If 3.3 VA, 5 V is abnormal, replace MAIN board.
3) If 3.3 VA, 5 V OK, replace FRONT board.
1-3-3. Service hint (Any picture / Remark)
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< MAIN board top view >
CN103
CN103
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LG SJ8S Specifications

General

Brand	LG
Model	SJ8S
Category	Speaker System
Language	English