Trouble Of Dc-Dc Converter - Vizio GV47L FHDTV10A Service Manual

TROUBLE OF DC-DC CONVERTER

CONFIDENTIAL – DO NOT COPY
Start
J7 PIN10,11,12
Yes
J7 PIN 2,3,4
Yes
U1 pin 5 6 7 8
Yes
U4 pin2
Yes
U6 pin 2
Yes
U5 pin2
Yes
U8 pin2
U7&U8&U10 pin2
END
N0
The voltage is about + 5V
1.Check power board
2.Check power cable
connection J7
N0
The voltage is about + 12V while
power switch on
1.J7 connection good
2.Check J7 Pin1 is up to 3V?
3.Check power board
N0
The voltage is about +5V while
power switch on
1. Check U11 GPIO_7 Pin
N0
The voltage is about +3.3V
1.Check U4
N0
The voltage is about +3.3V
1.Check U6
N0
The voltage is about +1.8V while
power switch on
1.Check U5
N0
The voltage is about +3.3V
while power switch on
1.Check U8
The voltage is about +1.8V
while power switch on
1.Check U7&U8&U10
Page 9-5
File No. SG-0208