ViewSonic VX800-3 Service Manual - Page 48
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4.4 No Power On Check that CN100 Pin1 is approximately 12V YES NO Check that F100 output is 12V Failure point 1. Power Board failure 2. Disconnected between CN100 and power board YES Check that FB100, FB101 Is 12V NO Failure point F100 failure YES Check that IC100 pin 2 is about 5V NO Failure point 1.L200 failure 2.D200 failure 3.IC100 failure NO Failure point FB100, FB101 failure ViewSonic Corporation 54! Confidential - Do Not Copy VX800-3
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4.4 No Power On
Check that CN100 Pin1 is approximately 12V
YES
NO
Check that F100 output is
12V
Failure point
1. Power Board failure
2. Disconnected between CN100 and power board
Check that FB100, FB101
Is 12V
YES
NO
Check that IC100
pin 2 is about 5V
YES
NO
Failure point
F100 failure
Failure point
FB100, FB101 failure
Failure point
1.L200 failure
2.D200 failure
3.IC100 failure
NO
ViewSonic Corporation
Confidential – Do Not Copy
VX
8
00-3