LG SPD75A Service Manual

3-5
Copyright © 2020 LG Electronics Inc. All rights reserved.
Only for training and service purposes.
ONE POINT REPAIR GUIDE
1. NO BOOTING WHEN YOU TURN THE UNIT ON, NO MESSAGE OR
“HELLO” ON FRONT PANEL
When you turn on your set, no message on the front panel, and LED doesn’t work.
1-1. IC604 System 12 VA (No 12 VA)
1-1-1. Solution
Replace AMP board.
1-1-2. How to troubleshoot (Countermeasure)
1) Please check 25 VA of IC604 pin2(VIN).
2) If 25 VA is abnormal, please check adapter.
3) If 25 VA is OK, but 12 VA is abnormal pin3 of IC604 (VOUT), replace AMP board.
1-1-3. Service hint (Any picture / Remark)
< AMP board top view >
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IC604
IC604
IC604
IC604
L611
L611
FB611
FB611

LG SPD75A Specifications

General

Brand	LG
Model	SPD75A
Category	Speaker System
Language	English