Sharp XG-V10XE Service Manual page 56

XG-V10XE
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-10
Checking the VIDEO sync signal
» Checking the VIDEO vertical sync signal.
Measure the TL8135 output on
oscilloscope screen.
Is the vertical sync signal as
specified?
Yes
» Checking the VIDEO
Measure the TL8132 output on
oscilloscope screen.
Is the horizontal sync signal as
specified?
Yes
Are there horizontal and
vertical sync signals at TL8130
and TL8131?
Yes
Is the pulse output at pin (4) of
IC8328 in the same timing as
the horizontal signal?
Yes
Is the pulse output at pin (5) of
IC8328 in the same timing as
the pulse at pin (4)?
Yes
Is there 69-MHz or so clock at
FL8102?
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
IC8302 or its peripherals
defective.
No
CVIC_IC or its peripherals
defective.
No
CVIC_IC or its peripherals
defective.
No
IC8328 (PLL_IC) or its
peripherals defective.