Sharp XG-V10WE Service Manual page 52

XG-V10WE
AN-SD1E/S422E
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-6
Checking the GA4 peripherals
Select R, G and B individually
on the pattern menu.
Are the R, G and B video
outputs as specified?
Measure the FB4, FB5, FB6,
FB10, FB11 and FB12 outputs
on oscilloscope screen.
Are the pattern menu-selected
settings and the above
measurements consistent?
Are there clocks at pins (31),
(32) and (33) of IC50 and
IC51?
Measure the TL106 thru TL111
outputs on oscilloscope
screen.
Are the pattern menu-selected
settings and the above
measurements consistent?
Yes
No
Yes
No
No
Yes
Is there 54-MHz clock at
FL110?
No
Yes
GA4 defective.
GA4 peripherals checking
complete.
Output PWB defective.
Yes
Is there clock at TL114?
No
No
Yes
CVIC_IC defective.
CVIC_IC defective.
52
GA4 defective.
X5 (quartz oscillator)
defective.