Vizio VO420E Service Manual page 19
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Also See for VO420E:
- User manual (67 pages) ,
- Quick start manual (2 pages) ,
- User manual (67 pages)
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TROUBLE OF DC-DC CONVERTER
J4 PIN10,11,12
U1 pin 5 6 7 8
U22,U15 pin2
–
CONFIDENTIAL
DO NOT COPY
Start
Yes
Yes
J4 PIN 2,3,4
Yes
Yes
Yes
Yes
U20 pin2
Yes
U17 pin2
Yes
U21 pin2
Yes
U19 pin2
Yes
U18 pi2
Yes
END
The voltage is 5VSB
N0
1. Check power board
2. Check power cable connection J4
The voltage is +12V while power switch on
N0
1. J4 connection good
2. Check power board
N0
The voltage is +5V while power switch on
1. Check U12 OPWRSB Pin
N0
The voltage is about +3.3V
N0
The voltage is about +1.8V
N0
The voltage is about +3.3V
N0
The voltage is about +1.25V
N0
The voltage is about +2.5V
N0
The voltage is about +1.1V
Page 9-5
File No. SG-0295
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