Read Sharp PG-C20XE (serv.man6) Service Manual online
40
PG-C20XU
PG-C20XE
PG-C20XE
AN-Z7T
Checking the video sync
signal
Using the oscilloscope,
measure the signal at
TL8006. (Check the
vertical sync signal.)
measure the signal at
TL8006. (Check the
vertical sync signal.)
Using the oscilloscope,
measure the signal at
TL8009. (Check the
horizontal sync signal.)
measure the signal at
TL8009. (Check the
horizontal sync signal.)
NO
NO
NO
YES
Is there signal with half the
vertical frequency at
TP8010?
vertical frequency at
TP8010?
YES
Is there 27MHz or so clock
signal at FL8034?
signal at FL8034?
YES
Is there 13.5MHz or so
clock signal at FL8034?
clock signal at FL8034?
IC8003 or its peripheral
circuit defective.
circuit defective.
End
YES
YES
YES
Is the vertical sync signal
as specified?
as specified?
If out of spec again,
IC8003 or its peripheral
circuit defective.
IC8003 or its peripheral
circuit defective.
Is the horizontal sync
signal as specified?
signal as specified?
Is there 15kHz or so signal
at TP8007?
at TP8007?
Go to "Checking the input
signal setting".
signal setting".
NO
NO
NO
Click on the first or last page to see other PG-C20XE (serv.man6) service manuals if exist.