Service manual

ManualsBrandsViewSonic ManualsComputer equipmentVG800-2

!

!

A4. No Power On

Check that JM1 Pin1 is approximately 12V

YES NO

Check that ICM1 PIN8 and

ICM2 Pin 5, 6, 7, 8 is 12V

Failure point

1. AC adapter failure

2. Disconnected between JM1 and power cord

Check that ICM1 pin5

Is about 5V

YES NO

Check that LM5

pin 2 is about 5V

YES NO

Failure point

LM1,2 failure

Failure point

ICM1 failure

Failure point

1.LM5 failure

2.DM1 failure

3.ICM2 failure

NO

ViewSonic Corporation

Confidential – Do Not Copy

VG800b

47