No Power On - ViewSonic VX500PLUS-1 Service Manual

3. No Power On

Check that ICM1 PIN1 and
ICM2 Pin 1,2,3 is 12V
YES
Check that ICM2
Pin5, 6, 7, and 8 is
YES
Check that LM5
pin 2 is about 5V
NO
Failure point
1.LM5 failure
2.DM1 failure
3.ICM1 failure
ViewSonic Corporation
Check that JM1 Pin1 is approximately 12V
YES
NO
Failure point
1. AC adapter failure
2. Disconnected between JM1 and power cord
NO
Failure point
LM1 failure
NO
Failure point
ICM2 failure
42
Confidential – Do Not Copy
VX500+-1