Acer V173 - Page 46

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4. No Raster
No raster?
Yes
No
Check power
su
pp
l
y
No
Check I/F
board
Yes
R501 open
No
Yes
Is Ok IC501?
Yes
U501, U502 fail
No
IC501 fail
T501, T502 fail
No
Connecting the
output connector
again
No
Yes
Is there 14Vdc
voltage on pin9
of IC501?
Yes
Is there high-level
voltage on pin8 of
IC501?
Is Ok R510?
Are connected rightly
CN501, CN502,
CN503 and CN504?
Is there instantaneously
pulse wave on pin14,
pin11 of IC501 at the
moment of restart?
Is T501, T502 ok?
LED Blue?
Backlight can’t
be turned on.
Yes
Yes
Yes
No
Check feedback circuit
Isen,Vsen.(pin 1.2)
Yes
END