Service manual

6.5 Backlight can’t be turned on
No raster?
Yes
No
Check power
No
Check I/F
Yes
R503 open
No
Yes
Is Ok IC501?
Yes
U501 fail
No
IC501 fail
T501 fail
No
Connecting the
output connector
No
Yes
Is there 14Vdc
voltage on pin9
of IC501?
Yes
Is there high-level voltage
on pin8 of IC501?
Is Ok R503?
Are connected rightly
CN501, CN502?
Is there instantaneously pulse
wave on pin14, pin11 of IC501
at the moment of restart?
Is T501
ok
?
LED Blue?
Backlight can’t
be turned on.
Yes
Yes
Yes
No
Check feedback circuit
Yes
END
ViewSonic Corporation
VX2433wm-1
VX2433wm-CN
CONFIDENTIAL – DO NOT COP
Y
79