Sharp XV-Z12000 (serv.man12) Service Manual ▷ View online
47
XV-Z12000
IC8004 peripheral check
Set the signal generator to output
a RAMP signal.
a RAMP signal.
IC8004 is defective.
YES
NO
Is a synchronization signal
present at TL8022, TL8025,
and TL8084?
present at TL8022, TL8025,
and TL8084?
The IC8325 peripheral parts or
IC8025 (CVIC) are defective.
IC8025 (CVIC) are defective.
YES
NO
Check the RAMP signal on
TL8073 - 75 using an oscilloscope.
Is a correct signal being output?
TL8073 - 75 using an oscilloscope.
Is a correct signal being output?
Is the video signal present at
pins (124), (133), and (139) of
IC8004?
pins (124), (133), and (139) of
IC8004?
YES
NO
Is a pulse present at pins (21) -
(88) of IC8004?
(88) of IC8004?
IC8004 is defective.
IC8025 (CVIC) is defective.
YES
NO
NO
Is a clock signal present at
R8128?
R8128?
The IC8004 clock oscillation
circuit or IC8004 is defective.
circuit or IC8004 is defective.
The IC8367 peripheral
circuit or the main unit
is defective.
circuit or the main unit
is defective.
YES
48
XV-Z12000
Check the input signal type.
Supply a component signal to
INPUT1 or INPUT2.
INPUT1 or INPUT2.
Select INPUT1 or INPUT2 using
the key on the main unit or the
remote control.
the key on the main unit or the
remote control.
YES
NO
Is a projection image displayed?
YES
Is the color normal?
Is the image frame normal?
Go to "Check the SOG circuit.".
Perform the process adjustment.
Does the color become normal?
Does the color become normal?
End of "GA4
peripheral check".
peripheral check".
Go to "IC8004 peripheral
check".
check".
YES
End.
Check the input at the components
(480i and 580i are excluded).
(480i and 580i are excluded).
NO
NO
NO
When checking the optional input signal on the menu display,
select the component or set it to the component using the
RGB/COMP key on the remote control (toggles).
select the component or set it to the component using the
RGB/COMP key on the remote control (toggles).
49
XV-Z12000
Is the signal generator (input
source) set correctly?
source) set correctly?
NO
YES
YES
Is a composite synchronization
signal present at R8981?
signal present at R8981?
NO
Is a composite synchronization
signal with the correct timing
being output to TL8136?
signal with the correct timing
being output to TL8136?
Is a video signal present at pin
(17) of IC8367?
(17) of IC8367?
The SOG circuit is normal.
The IC8325 peripheral circuit is
defective.
defective.
The SOG circuits (IC8371 and
Q8022 - 23) are defective.
Q8022 - 23) are defective.
NO
The IC8367 peripheral circuit is
defective or the main unit is
defective.
defective or the main unit is
defective.
Check the SOG circuit.
NO
Set the signal generator (input
source) correctly.
source) correctly.
YES
YES
50
XV-Z12000
Check the input signal type.
Supply a 525i (625i) RGB (or
component) signal to INPUT1
or INPUT2.
component) signal to INPUT1
or INPUT2.
Select INPUT1 or INPUT2 using
the key on the main unit or the
remote control.
the key on the main unit or the
remote control.
YES
NO
Is the picture distorted?
YES
Is the color normal?
Is the image frame normal?
Perform the process adjustment.
Does the color become normal?
Does the color become normal?
Go to "GA4
peripheral check".
peripheral check".
Go to "IC8004 peripheral
check".
check".
YES
End.
YES
NO
Is a projection image displayed?
Go to "Check the SOG circuit."
NO
NO
NO
When checking the optional input signal on the menu display,
select RGB (or component) or set it to RGB (or component)
using the RGB/COMP key on the remote control.
select RGB (or component) or set it to RGB (or component)
using the RGB/COMP key on the remote control.
Go to "Check the VIDEO
synchronization signal."
synchronization signal."
Check the 525i (625i) RGB (or
component) input.
component) input.
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