LG S92T2-C Service Manual page 41

No power problem occurs when you power on the unit.
1-2. VFD, 14 VA, 6 VA, 3.8 VA
1-2-1. Solution
Replace D922, D923, D924, D925, D926, D927, IC901.
1-2-2. How to troubleshoot (Countermeasure)
Case 1) FLD abnormal: Check D926, D927, ZD951, ZD952, FR952 and replace it.
Case 2) 6 VA abnormal: Check D924 and replace it.
Case 3) 14 VA abnormal: Check D925 and replace it.
Case 4) 3.8 VA abnormal: Check D922, D923 and replace it.
Case 5) All voltage abnormal: Check IC901 and replace it.
Vkk No Power
D926 is Defective
No Power
D904 is Defective
Case 5
(IC901)
1-2-3. Service hint (Any picture / Remark)
Case 2
(D924)
< SMPS board top view >
ONE POINT REPAIR GUIDE
Case 5
(IC901)
2-28
FLD No Power
D927 is Defective
Case 2
6VA No Power
(D924)
Case 4
(D923, D922)
Case 3
(D925)
Case 3
(D925)
Case 4
(D923, D922)
(D927, D926, ZD951, ZD952)
< SMPS board bottom view >
No D
ZD95
Case 1
(D927, D926,
ZD951, ZD952)
D924 is Defective
3.8 V
D923,
14 V
Case 1