Power Supply On Main Board - LG FH6 Service Manual
High power all-in-one speaker system
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Also See for FH6:
- Owner's manual (42 pages) ,
- Simple manual (8 pages) ,
- Simple manual (8 pages)
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ELECTRICAL TROUBLESHOOTING GUIDE
POWER SUPPLY ON MAIN BOARD
No 12 V
Is the VCC supplied to IC301 pin2?
Is there signal at IC301 pin1?
Check IC301 and replace.
No 1.2 VA
Is the VCC supplied to IC302 pin3?
Check IC302 and replace.
YES
YES
YES
YES
YES
NO
Check 12.5 VA on SMPS board.
NO
Check IC501 pin150 (PWR_CTRL).
NO
Check 5.5 VA on SMPS board.
3-23
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