Trouble Shooting Flow Chart - ViewSonic VE175-2 Service Manual

TROUBLE SHOOTING FLOW CHART

6.
6.1. NO POWER
Start
Y
Check 12V
on C170/+
Y
Check 5V
on C173/+
Y
Check
3.3V/1.8V
Y
Check
pin 8 of I108
+5V_MCU
ViewSonic Corporation
Check AC TO DC
N
PCB
F801,D810~D813
N
Check
12V to 5V CKT
N
Check
3.3V/1.8V to GND
Check
N
Q107,Q108
R210~R212
15
N
Replace
AC TO DC PCB
N
Replace
Main Board
Confidential – Do Not Copy
VE175/b-2