ViewSonic VA702B Service Manual - Page 38
No Power & Power LED Off
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UPC - 766907146417
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2. No Power & Power LED Off No power Check primary rectifier voltage Check pin3 of IC802 voltage about 1V Check circuit if short Check IC802, C805, T801 Check F801, P801, D801 Check R801, R805, R822, R823, R817 Check pin2 of IC802 voltage about 2V Check pin1 of IC802 voltage is 5.8V END Check R803, R807, R824, R825 Check R812, R816, C818 ViewSonic Corporation Confidential - Do Not Copy 35 VA702-1_VA702b-1
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ViewSonic Corporation
Confidential - Do Not Copy
VA702-1_VA702b-1
35
2.
No Power & Power LED Off
No power
Check primary
rectifier voltage
Check IC802,
C805, T801
Check circuit
if short
Check F801, P801,
D801
Check pin3 of
IC802 voltage
about 1V
Check R801, R805,
R822, R823, R817
Check pin2 of IC802
voltage about 2V
Check R803, R807,
R824, R825
Check pin1 of IC802
voltage is 5.8V
Check R812, R816,
C818
END