Acer AL1717 - Page 23

Acer Service Manual
22
3. No raster
No raster
END
LED Green?
Backlight can
not be turned on
Is Ok IC501?
Is R526 Ok?
Is ok T501, T502?
Is there pulse waveform on pin1,
pin3, pin15 and pin16 of IC501 at the
moment of restart?
Check CN501, CN502,
CN503 and CN504?
Is there high-level
voltage on pin8 of
IC501
Is there 14Vdc
voltage on pin13 of
IC501?
U501, U502 fail
Check I/F board
Check power
supply
R526 open
Connecting the
output connector
again
T501, T502 fail
Check protected
circuit Q501, Q502,
Q503, Q504
IC501 fail
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
YES
YES