Power Supply On Main Board - LG S65T1-S Service Manual
3d blu-ray / dvd home theater system
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Also See for S65T1-S:
- Service manual (113 pages) ,
- Owner's manual (76 pages) ,
- Owner's manual (72 pages)
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ELECTRICAL TROUBLESHOOTING GUIDE
2. POWER SUPPLY ON MAIN BOARD
No 3.3 V
Is the VCC supplied
to IC156 pin3?
Is there signal
at IC156 pin2?
Check IC156 and replace.
No 3.3 VA
Is the VCC supplied
to IC155 pin3?
Check IC155 and replace.
YES
YES
YES
YES
YES
NO
Check 5.5 VA on SMPS board.
NO
Check IC101 pin25 (DCDC33_CTRL).
NO
Check 5.5 VA on SMPS board.
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- Front / Rear Speaker
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