LG HX966TZ Service Manual page 91

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 D921, D923, D925, D926, D927, IC901.
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.
wer
efective
Case 6
IC901, IC902 are Defective
1-2-3. Service hint (Any picture / Remark)
Case 2
Case 6
< SMPS board top view >
ONE POINT REPAIR GUIDE
D904 is Defective
S/W Error
3.8VA No Power
Case 2
D922, D923 are Defective
Case 4
Case 3
No AMP Power
Q910, PC902,Q914 are Defective
Switching Error
PC901 IC903 are Defective
Case 5
< SMPS board bottom view >
2-78
Case 1
14VA No Power
D925 is Defective
Case 5
Case 1
Case 4
Case 3
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