Output Power Is Unstable - ViewSonic VA2226w-1 Service Manual

6.4. Output power is unstable

Unstable power
Check sampling
Check the R pin
voltage of IC803
ViewSonic Corporation
Circuit
Check pin2
of IC802
Check pin1 of
IC802 voltage
b l 1V
END
Check R822,
R823, R824
Check the C
pin voltage of
IC803 if 3V
Check R819, R820
Check R818, D804,
C807 if short
Change
R818,
D804,
Change R808, R
809, R810, R 811,
R815,
56
Confidential - Do Not Copy
Change R822,
R823, R824
Change
IC803
VA2226w-1