LG SJ7 - One Point Repair Guide

3-5
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Only for training and service purposes.
ONE POINT REPAIR GUIDE
1. PRIMARY UNIT
1. NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE OR “HELLO” ON
FRONT PANEL
1-1. IC200 System 12 VA (No 12 VA)
1-1-1. Solution
Replace MAIN board.
1-1-2. How to troubleshoot (Countermeasure)
1) Please check 25 VA of IC200 pin2 (VIN).
2) If 25 VA is abnormal, please check adapter.
3) If 25 VA is OK, but 12 VA is abnormal pin3 of IC200 (VOUT), Replace MAIN board.
1-1-3. Service hint (Any picture / Remark)
< MAIN board top view >
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IC200
IC200
L201
L201