Sharp XG-V10WE (serv.man8) Service Manual ▷ View online
49
XG-V10WE
AN-SD1E/S422E
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-3
Checking the video input
Checking the input signal settings
No
No
Yes
Yes
Yes
Yes
No
2
1
Check up the input signal
settings.
settings.
Check the sync signal.
Are connector connections
and input menu selection as
specified?
and input menu selection as
specified?
Are connectors properly
connected?
connected?
Select the right ones.
Reconnect the connectors.
Input signal settings completed.
CVIC_IC or ADCÆEPLL circuit
defective.
defective.
Input PWB defective.
Is there video signal at C77
land?
land?
50
XG-V10WE
AN-SD1E/S422E
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-4
Checking the sync signal
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Is there vertical sync signal at
TL134?
TL134?
Check up the input signal
settings.
settings.
»
Check the H/V separation type sync signal.
Is there horizontal sync signal
at TL133?
at TL133?
Input PWB defective.
Is there vertical sync signal at
TL131?
TL131?
Is there horizontal sync signal
at TL130?
at TL130?
PC board s sync signal
selector circuit or its
peripherals defective.
selector circuit or its
peripherals defective.
Are both the vertical and
horizontal sync signals in
good timing?
horizontal sync signals in
good timing?
No problem with the sync
signal.
signal.
Is the signal generator (input
source) as specified?
source) as specified?
Make proper signal source
settings.
settings.
Input PWB defective.
2
51
XG-V10WE
AN-SD1E/S422E
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-5
No
Yes
No
Yes
Yes
No
Checking the R, G and B colors
Is the signal type set for RGB?
Call the process mode.
Select R, G and B individually
on the pattern menu.
on the pattern menu.
Check the GA4 peripherals.
Set the signal generator for the
tone signal to check the input
signal.
tone signal to check the input
signal.
Watch the TP1, TP2 and TP3
outputs on oscilloscope screen
to check the tine signal.
outputs on oscilloscope screen
to check the tine signal.
Are the TP1, TP2 and TP3
outputs as specified?
outputs as specified?
CVIC_IC or its peripherals
defective.
defective.
ADC·PLL_IC or its
peripherals defective.
peripherals defective.
»
Check the R, G and B (Y, Pb and Pr) colors.
Set the type for RGB.
Are there signals at
C69 and C61?
C69 and C61?
Input PWB defective.
52
XG-V10WE
AN-SD1E/S422E
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-6
Checking the GA4 peripherals
Yes
No
No
Yes
Yes
Yes
Yes
Yes
No
No
No
No
Select R, G and B individually
on the pattern menu.
on the pattern menu.
Are the R, G and B video
outputs as specified?
outputs as specified?
Measure the FB4, FB5, FB6,
FB10, FB11 and FB12 outputs
on oscilloscope screen.
FB10, FB11 and FB12 outputs
on oscilloscope screen.
Are the pattern menu-selected
settings and the above
measurements consistent?
settings and the above
measurements consistent?
Are there clocks at pins (31),
(32) and (33) of IC50 and
IC51?
(32) and (33) of IC50 and
IC51?
Measure the TL106 thru TL111
outputs on oscilloscope
screen.
outputs on oscilloscope
screen.
Are the pattern menu-selected
settings and the above
measurements consistent?
settings and the above
measurements consistent?
GA4 peripherals checking
complete.
complete.
Output PWB defective.
GA4 defective.
X5 (quartz oscillator)
defective.
defective.
Is there clock at TL114?
CVIC_IC defective.
GA4 defective.
Is there 54-MHz clock at
FL110?
FL110?
CVIC_IC defective.
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