TROUBLE OF DC-DC CONVERTER
Start
N0
J7 PIN10,11,12
Yes
N0
J7 PIN 2,3,4
Yes
N0
U1 pin 5 6 7 8
Yes
N0
U4 pin2
Yes
N0
U6 pin 2
YesN0
U5 pin2
Yes
N0
U8 pin2
U7&U8&U10 pin2
The voltage is about + 5V 1.Check power board 2.Check power cable connection J7
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
The voltage is about +5V while power switch on
1.J1 connection good
2.Check U11 GPIO_7 Pin
The voltage is about | +3.3V |
1.J1 to connection good? | |
2.Check U4 |
|
The voltage is about | +3.3V |
1.J1 to connection good? | |
2.Check U6 |
|
The voltage is about | +1.8V while |
power switch on |
|
1.Check U5 |
|
The voltage is about | +3.3V |
while power switch on |
|
1.Check J1 Connect |
|
2.Check U8 |
|
The voltage is about | +1.8V |
while power switch on |
|
1.Check J1 Connect |
|
2.Check U7&U8&U10
END
CONFIDENTIAL – DO NOT COPY | Page |
| File No. |
