Sharp XG-V10WE Service Manual page 56

XG-V10WE
AN-SD1E/S422E
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-10
Checking the VIDEO sync signal
» Checking the VIDEO vertical sync signal.
Measure the TL135 output on
oscilloscope screen.
Is the vertical sync signal as
specified?
Yes
» Checking the VIDEO
Measure the TL132 output on
oscilloscope screen.
Is the horizontal sync signal as
specified?
Yes
Are there horizontal and
vertical sync signals at TL130
and TL131?
Yes
Is the pulse output at pin (4) of
IC328 in the same timing as
the horizontal signal?
Yes
Is the pulse output at pin (5) of
IC328 in the same timing as
the pulse at pin (4)?
Yes
Is there 69-MHz or so clock at
FL102?
Yes
No problem with the VIDEO
sync signal and clock.
56
No
vertical sync signal
No
Check the input signal settings.
Input PC board defective.
No
IC302 or its peripherals
defective.
No
CVIC_IC or its peripherals
defective.
No
CVIC_IC or its peripherals
defective.
No
IC328 (PLL_IC) or its
peripherals defective.