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Acer Manuals
Monitor
BV193HQ
Service manual
Acer BV193HQ Service Manual page 57
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Contents
Table of Contents
Troubleshooting
Bookmarks
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4.4 No Raster
No raster?
Backlight can't
be turned on.
Is there 16Vdc
voltage on pin9
of IC501?
Is there high-level
voltage on pin8 of
IC501?
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
?
Check feedback circuit
Isen,Vsen.(pin 1.2)
pin2,D508,D509.)
Yes
LED Blue?
Yes
Yes
No
Yes
Yes
Yes
Yes
No
Yes
Check power
supply
No
Is Ok R510?
No
No
No
Is Ok IC501?
No
56
Acer –LCD-BV193HQ
Yes
Check I/F
board
R501 open
Connecting the output
connector again
Yes
U501, U502 fail
IC501 fail
T501, T502 fail
END
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