One Point Repair Guide; Power On Error - LG SL8YG Service Manual

1. POWER ON ERROR

Fundamental power check points.
1-1. 12 V
1) Check 12 V at WL708.
2) If 12 V is not checked at the point, then find PVDD at pin7 of WIC704.
3) 1), 2) is NG  Replace WIC704.
If you can't check PVDD voltage, then replace the PCB board.
+ ~ ~ -
1-2. 3.3 VA
1) Check 3.3 VA at WL707 coil.
2) If 3.3 VA is not checked at the point, then find 12 VA at pin3 of WIC705.
3) 1), 2) is NG  Replace WIC705.
If you can't check 12 VA voltage, refer to the step 1-1.
W R 9 0 3 W R 9 0 2 W R 9 0 1

ONE POINT REPAIR GUIDE

W Z D 9 0 1
W I C 9 0 5
MES
< Woofer SMPS & AMP board top view >
WL707 WL707
W C 7 7 8
WIC705 WIC705
< Woofer SMPS & AMP board top view >
W C 7 8 3
W C 7 8 4
W C 7 7 7
W C 7 8 6
W C 7 8 5
W C 7 0 0
W C 7 7 0
WIC704 WIC704
W C 7 7 2
W C 7 7 4
W C 7 9 1
WL708 WL708
B
W L 7 0 7
W C 7 6 8
W C 7 7 3
W C 7 7 6
W C 7 6 9
W C 7 1 9 W C 7 2 2
W C 6 3 0
W C N 6 0 1
4-4
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W R 9 4 4
W R 9 4 3
W R 9 1 5
W C 7 4 5 W C 7 5 1
W C 7 4 6
W C 7 5 4
W R 7 5 5 W R 7 5 6
W R 7 5 0
W C 7 4 7
W R 7 5 1
W C 7 3 6
W C 7 3 5 W C 7 3 4 W C 7 3 3
W I C 7 0 1
W C 7 1 4
W C 7 1 2
W C 6 1 5
W R 6 2 1
W R 6 2 2
W R 6 2 6
W R 6 2 5
M _ S C L
W R 6 0 3
M _ S D A W R 6 0 4
W C 6 0 8
W C 6 0 6
W C 6 0 7
Only for training and service purposes.