CONFIDENTIAL
–
DO NOT COPY
Page 9-5
File No. SG-0301
Yes
N0
The voltage is +12V while power
switch on
1. J4 connection good
2. Check power board
The voltage is +5V while power switch
on
1. Check
U12 OPWRSB Pi
n
Yes
N0
N0
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
N0
N0
N0
N0
N0
N0
N0
Yes
TROUBLE
OF
DC-DC
CONVERTER
Start
J4 PIN10, 11, 12, U13 Pin2
J4 PIN 2, 3, 4
The voltage is +5V
1. Check power board
2. Check power cable connection J4
U1 pin 5 6 7 8
U2, U4, U7 pin2
The voltage is about +3.3V
U3 pin3, 4
The voltage is about +1.3V
U6 pin6, U8 pin2
The voltage is about +1.25V
U5 pin2
The voltage is about +2.6V
U19 pin2
The voltage is about +2.5V
U9 pin2
The voltage is about +2.5V
END
U21 pin 5,6,7,8
The voltage is about +12V
