Sharp XG-P25X - Page 51

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.
Measure the signal at TL8140
on the oscilloscope screen.
(Check the vertical sync
signal.)
Measure the signal at
TL8142 on the oscilloscope
screen. (Check the
horizontal sync signal.)
Is the clock signal as
specified?
Go to "Checking the video
sync signal".
IC8338 defective.
IC8025 or its peripheral
parts defective.
Checking the video sync
signal
Is the vertical sync
signal as specified?
Is the horizontal sync
signal as specified?
Go to "Checking the input
signal settings".
Input PWB defective.