LG SPD75A Service Manual

3-12
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Only for training and service purposes.
ONE POINT REPAIR GUIDE
3. PROTECTION ERROR
No display or No Sound.
3-1. D(DC) PROTECTION
3-1-1. Solution
Replace AMP board.
3-1-2. How to troubleshoot (Countermeasure)
1) Check DC voltage of speaker out FL+/- & Top L+/- (CN703 pin1, 2, 3, 4), C+/- (CN702 pin1,2),
FR+/- & TOP R+/- (CN704 pin1, 2, 4, 5).
3-1-3. Service hint (Any picture / Remark)
< AMP board top view >
CN702
CN702
CN702
CN702
CN703
CN703
CN704
CN704
CN703
CN703
CN704
CN704

LG SPD75A Specifications

General

Brand	LG
Model	SPD75A
Category	Speaker System
Language	English