Read Sharp XG-V10WE (serv.man8) Service Manual online
55
XG-V10WE
AN-SD1E/S422E
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-9
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
Checking the VIDEO input
5
5
Feed the composite video
signal to INPUT4 or INPUT 5.
signal to INPUT4 or INPUT 5.
Using panel key or remote
controller, select INPUT4 or
INPUT5.
controller, select INPUT4 or
INPUT5.
Select the VIDEO signal type
on user menu.
on user menu.
Does image appear onscreen?
Is the image free of distortion?
Are the colors as specified?
Measure the following outputs on
oscilloscope screen: at pin (5)(R)
of IC324, pin (3)(G) of IC326 and
pin (5)(B) of IC326.
oscilloscope screen: at pin (5)(R)
of IC324, pin (3)(G) of IC326 and
pin (5)(B) of IC326.
Is the video signal level
between VRB and VRT?
between VRB and VRT?
Measure the output at pin (5) or
(6) of IC323 on oscilloscope
screen.
(6) of IC323 on oscilloscope
screen.
No problem with the VIDEO
input.
input.
Check the VIDEO sync signal.
IC310 or CVIC_IC defective.
Is the clamp pulse as
specified?
specified?
Check the VIDEO sync signal.
CVIC_IC or its peripherals
defective.
defective.
Clamp level setting IC (IC316,
IC327 or IC323) or its
peripherals defective.
IC327 or IC323) or its
peripherals defective.
Check the VIDEO sync signal.
Carry out the process
adjustment.
adjustment.
»
VRB: Bottom reference voltage at video ADC
»
VRT: Top reference voltage at video ADC
»
Checking the clamp pulse
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