LG SPM2 - Protection Error

3-11
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Only for training and service purposes.
SW 4ohm
FL 6ohm
FR 6ohm
AMP_SWCH+ OUT
AMP_SWCH- OUT
AMP_LCH+ OUT
AMP_LCH- OUT
AMP_RCH+ OUT
AMP_RCH- OUT
CWBSP2CN502
C517
50V/1000pF
C518
50V/1000pF
C544
50V/1000pF
C545
50V/1000pF
C580
50V/1000pF
C579
50V/1000pF
1234
5
6
CN502
A2001-06A
DGND
DGND
ONE POINT REPAIR GUIDE
3. PROTECTION ERROR
No display or No Sound.
3-1. D(DC) PROTECTION
3-1-1. Solution
Replace MAIN board.
3-1-2. How to troubleshoot (Countermeasure)
1) Check DC voltage of speaker out FL+/- , FR+/- , WOOFER +/- (CN502).
3-1-3. Service hint (Any picture / Remark)
CN502
CN502
< MAIN board top view >