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1.
Power supply is defective
﹒
No power or power
abnormal
Power indicator
LED don't light
Is F101 normal
Is CR101
is IC101 normal
Is Q101 or R111,
R112 normal
Check horizontal
and vertical circuit
Replace F101
Replace CR101
Replace IC101
Replace Q101 or
R111, R112
Does the power
indictor LED light
once and the go out
Check horizontal circuit
and power on again
Is the power indicator
LED light normally
Check vertical circuit and
power on again
Is the LED normal
Check video circuit
Are TP201~TP205
voltage normal
Check D201, D203, D205,
D206, Q203, Q208
Is the T101 normal
Replace T101
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
Yes
No
No
Yes
No
No
Yes
6. Trouble Shooting Flow Chart
43
ViewSonic
Corporation
Co
nfidential
-
Do
Not
Copy
A91f+-1
Содержание A91f+-1
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