Sharp XV-Z9000U Service Manual page 43

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