Sharp XG-V10WE (serv.man8) Service Manual ▷ View online
53
XG-V10WE
AN-SD1E/S422E
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-7
Yes
Yes
Yes
Yes
No
No
No
No
Checking the COMPONENT input
Feed the COMPONENT signal
to INPUT1 or INPUT 2.
to INPUT1 or INPUT 2.
Using panel key or remote
controller, select INPUT1 or
INPUT2.
controller, select INPUT1 or
INPUT2.
Does image appear onscreen?
Are the colors as specified?
Is the signal type of
COMPONENT?
COMPONENT?
Carry out the process
adjustment.
adjustment.
Is the image contour as
specified?
specified?
No problem with the
COMPONENT input.
COMPONENT input.
IC4 (CXA3516R) or IC25
(CVIC_IC) defective.
(CVIC_IC) defective.
Check the SOG circuit.
Set the signal type to
COMPONENT.
COMPONENT.
»
Check the COMPONENT (1080I, 720P, 480P, etc.:
480I not included) signals.
480I not included) signals.
4
4
54
XG-V10WE
AN-SD1E/S422E
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-8
Yes
Yes
No
No
Checking the SOG circuit
Measure the TL136 output on
oscilloscope screen.
oscilloscope screen.
Is the composite sync signal
reproduced in good timing?
reproduced in good timing?
Measure the C69 land on
oscilloscope screen.
oscilloscope screen.
Does the Y signal contain
sync signal?
sync signal?
SOG sync separation circuit
defective.
defective.
No problem with the SOG
circuit.
circuit.
Check the input signal settings.
Input PWB defective.
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
56
XG-V10WE
AN-SD1E/S422E
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-10
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Checking the VIDEO sync signal
Measure the TL135 output on
oscilloscope screen.
oscilloscope screen.
Is the vertical sync signal as
specified?
specified?
Measure the TL132 output on
oscilloscope screen.
oscilloscope screen.
Is the horizontal sync signal as
specified?
specified?
Are there horizontal and
vertical sync signals at TL130
and TL131?
vertical sync signals at TL130
and TL131?
Check the input signal settings.
Input PC board defective.
IC302 or its peripherals
defective.
defective.
Is the pulse output at pin (4) of
IC328 in the same timing as
the horizontal signal?
IC328 in the same timing as
the horizontal signal?
CVIC_IC or its peripherals
defective.
defective.
Is the pulse output at pin (5) of
IC328 in the same timing as
the pulse at pin (4)?
IC328 in the same timing as
the pulse at pin (4)?
CVIC_IC or its peripherals
defective.
defective.
Is there 69-MHz or so clock at
FL102?
FL102?
No problem with the VIDEO
sync signal and clock.
sync signal and clock.
IC328 (PLL_IC) or its
peripherals defective.
peripherals defective.
»
Checking the VIDEO vertical sync signal.
»
Checking the VIDEO
vertical sync signal
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