Read Sharp XV-Z9000E (serv.man3) Service Manual online
43
XV-Z9000U/E
6
7
Checking the video sync
signal
Using the oscilloscope,
measure the signal at
TL8140. (Check the
vertical sync signal.)
measure the signal at
TL8140. (Check the
vertical sync signal.)
Using the oscilloscope,
measure the signal at
TL8142. (Check the
horizontal sync signal.)
measure the signal at
TL8142. (Check the
horizontal sync signal.)
NO
NO
YES
Measure the VPC (IC8338)
clock signal at TL8004.
clock signal at TL8004.
Is the clock signal as
specified?
specified?
Go to “Checking the video
sync signal”.
sync signal”.
IC8338 defective.
IC8025 or its peripheral
circuit defective.
YES
YES
Is the vertical sync signal
as specified?
as specified?
Input PWB defective.
Is the horizontal sync
signal as specified?
signal as specified?
Go to "Checking the input
signal setting".
signal setting".
NO
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