Main Set One Point Repair Guide - LG LHB976 Service Manual

MAIN SET ONE POINT REPAIR GUIDE

No power problem occurs when you power on the unit.
1-1-2. VFD, 14 VA, 6 VA, 3.8 VA
1-1-2-1. Solution
Replace D921, D923, D925, D926, D927, IC901.
1-1-2-2. How to troubleshoot (Countermeasure)
Case 1) FLD Abnormal: Check D927, D926, 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) 12 V Abnormal : Check IC951 and replace it.
Case 6) All Voltage Abnormal: Check IC901and replace it.
1-1-2-3. Service hint (Any picture / Remark)
Case 2
Case 6
< SMPS board top view >
Case 6
Case 1
Case 2
Case 4
Case 3
< SMPS board bottom view >
2-78
Case 5
Case 1
Case 4
Case 3