Protection Error - LG SPM2 Service Manual

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)
AMP_RCH + OUT
AMP_SW CH - OUT
AMP_SW CH + OUT
CN502 CN502
ONE POINT REPAIR GUIDE
D GND
AMP_LCH + OUT
AMP_LCH - OUT
AMP_RCH - OUT
< MAIN board top view >
FL 6ohm
FR 6ohm
SW 4ohm
CWBSP2CN502
D GND
3-11
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