Service manual

Yes
Yes
Yes
N0
Yes
N0
N0
N0
TROUBLE OF DC-DC CONVERTER
Start
Is U5 pin1 correct?
+5VX correct?
VLCD correct?
3.3VX correct?
The voltage is about + 12V
1. Check power adaptor
2. Check power cable
3. Check FUSE1
The voltage is about + 4.9V
1. Check U5 output
2. Check L17 frequency
The voltage is about +4.9V
Check C57 & pin 8 of U6
Check U11 output
END
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