Read Sharp XG-P25XE (serv.man12) Service Manual online
XG-P25X
53
TROUBLE SHOOTING TABLE FOR PC I/F UNIT
(Continued)
6
NO
NO
NO
YES
YES
YES
7
Measure the VPC (IC8338)
clock signal at TL8004.
clock signal at TL8004.
Measure the signal at TL8140
on the oscilloscope screen.
(Check the vertical sync
signal.)
on the oscilloscope screen.
(Check the vertical sync
signal.)
Measure the signal at
TL8142 on the oscilloscope
screen. (Check the
horizontal sync signal.)
TL8142 on the oscilloscope
screen. (Check the
horizontal sync signal.)
Is the clock signal as
specified?
specified?
Go to "Checking the video
sync signal".
sync signal".
IC8338 defective.
IC8025 or its peripheral
parts defective.
parts defective.
Checking the video sync
signal
signal
Is the vertical sync
signal as specified?
signal as specified?
Is the horizontal sync
signal as specified?
signal as specified?
Go to "Checking the input
signal settings".
signal settings".
Input PWB defective.
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