Trouble Shooting Flow Chart - ViewSonic E55-2 Service Manual

1. Power supply is defective.
No power or power
abnormal
Power indicator
LED does't light
Yes
Is F101 normal
Yes
Is CR101 normal
Yes
is IC101 normal
Yes
Is Q101 or R111,
R112 normal
Yes
Check horizontal
and vertical circuit
ViewSonic Corporation
7.

TROUBLE SHOOTING FLOW CHART

No
No
Replace F101
No
ReplaceCR101
No
Replace IC101
No
Replace Q101 or
R111, R112
Does the power
indictor LED light
once and the go out
Check horizontal circuit
and power on again
Does the power indicator
LED light normally
Check vertical circuit and
power on again
Is the LED normal
Check video circuit
Yes
Are TP201~TP205
voltage normal
Check D201, D203, D205,
D206, Q203, Q208
Is the T101 normal
Yes
Replace T101
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No
Yes
No
No
No
No
E55-2