Sharp XV-Z21000 (serv.man3) Service Manual ▷ View online
XV-Z20000/XV-Z21000/DT-5000
5 – 5
Check the PC PWB unit.
Can the menu display be
brought up?
brought up?
YES
Check the RGB input.
Check the basic flow of the signals.
Since the component and VIDEO signals follow the
same path to the output as the formatter unit uses,
after CVIC (IC6001), the check that would otherwise
be performed after the CVIC does not need to be per-
formed. (480i and 576i are excluded.)
Since the component and VIDEO signals follow the
same path to the output as the formatter unit uses,
after CVIC (IC6001), the check that would otherwise
be performed after the CVIC does not need to be per-
formed. (480i and 576i are excluded.)
NO
Check OSD.
Check the input at the compo-
nents.
nents.
The signal passes through the same circuit as the
RGB input. Mainly, check the SOG (Sync On Green)
circuit and the color adjustment circuit. (480i and 576i
are excluded.)
RGB input. Mainly, check the SOG (Sync On Green)
circuit and the color adjustment circuit. (480i and 576i
are excluded.)
Check the VIDEO input.
Since the VIDEO input enters CVIC through a different
route than the RGB input, check the VIDEO IC.
(480i and 576i are excluded.)
route than the RGB input, check the VIDEO IC.
(480i and 576i are excluded.)
Check the 480iRGB (or com-
ponent) input.
ponent) input.
The video signal and the color signal pass through the
same circuits as the RGB input. However, since the
synchronization signal uses the VIDEO IC,
check the synchronization signal path.
same circuits as the RGB input. However, since the
synchronization signal uses the VIDEO IC,
check the synchronization signal path.
Check the DVI analog input.
Check the DVI digital/HDMI
input.
input.
The signal is reproduced in an IC specially designed
for use with the TMDS, and it enters the CVIC.
for use with the TMDS, and it enters the CVIC.
END
XV-Z20000/XV-Z21000/DT-5000
5 – 6
Check OSD.
Press the key on the main unit or the
[MENU] key on the remote control.
Is the menu display brought up?
[MENU] key on the remote control.
Is the menu display brought up?
YES
END
NO
Is there a clock signal at TL6618?
NO
Is a clock signal (74.25MHz) present at
TL6007?
TL6007?
NO
Check peripoheral circuits of
IC6001.
IC6001.
YES
YES
Is there a clock signal at TL6006
NO
X6002 is defective.
YES
Check peripoheral circuits of IC6001
Is a synchronization signal present at
TL6617, TL6620-21?
TL6617, TL6620-21?
NO
Check the bus signal between IC5003
and IC6001.
and IC6001.
YES
Check TL6622, TL6619 using an
oscilloscope. Is the signal seen cor-
rect?
oscilloscope. Is the signal seen cor-
rect?
YES
The connector CN6604 or FPC and for-
matter unit are defective.
matter unit are defective.
NO
IC6001 (CVIC) is defective.
XV-Z20000/XV-Z21000/DT-5000
5 – 7
Check the RGB input.
Input the sync separation RGB signal
to C1 or C2 (except 480i and 576i).
to C1 or C2 (except 480i and 576i).
Select C1 or C2 using the operation
key or the remote control.
key or the remote control.
Is a projection image displayed?
NO
Go to "Check the video input”.
YES
Is the picture distorted?
YES
Go to "Check the synchronization signal".
NO
Are all three colors (R, G, and B)
being output?
being output?
NO
Go to "IC5652 peripheral check".
YES
Is the image frame normal?
NO
Go to "IC5652 peripheral check".
YES
End
Check the video input.
Is the signal generator (input source)
set correctly?
set correctly?
NO
Set the signal generator (input source)
correctly.
correctly.
YES
Is the video signal present at pin (8)
of IC5209?
of IC5209?
NO
Check the installation of the main unit.
The main unit is defective.
The main unit is defective.
YES
Is the video signal present at
TL5659?
TL5659?
NO
Check the peripheral circuit of IC5209.
YES
Go to "Check the synchronization sig-
nal".
nal".
Go to "IC5652 peripheral check".
XV-Z20000/XV-Z21000/DT-5000
5 – 8
Check the synchronization signal.
Is the signal generator (input source)
set correctly?
set correctly?
NO
Set the signal generator (input source)
correctly.
correctly.
YES
Is a vertical synchronization signal
present at TL5505?
present at TL5505?
NO
Peripheral circuits of IC5502 and 5503 are
defective.
Or the main unit is defective.
defective.
Or the main unit is defective.
YES
Is a horizontal synchronization signal
present at TL5504?
present at TL5504?
NO
Peripheral circuits of IC5502 and 5503
are defective.
Or the main unit is defective.
are defective.
Or the main unit is defective.
YES
Is a vertical synchronization signal
present at TL5515?
present at TL5515?
NO
The IC5504, IC5510 or IC5511 peripheral
parts are defective.
parts are defective.
YES
Is a horizontal synchronization signal
present at TL5509?
present at TL5509?
NO
The IC5504, IC5510 or IC5511 peripheral
parts are defective.
parts are defective.
YES
Synchronization signals are normal.
IC5652 peripheral check
Set the signal generator to output a
RAMP signal.
RAMP signal.
Is a synchronization signal present at
R5610 and TL5515?
R5610 and TL5515?
NO
The IC5511 peripheral parts or IC6001
(CVIC) are defective.
(CVIC) are defective.
YES
Is a clock signal present at R5679?
NO
The IC5652 clock oscillation circuit or
IC5652 is defective.
IC5652 is defective.
YES
Are video signals sent to TL5655?
TL5661?
TL5661?
NO
The IC5209 peripheral circuit or the main
unit is defective.
unit is defective.
YES
Is a pulse present at pins (28) - (63)
of IC5652?
of IC5652?
NO
IC5652 is defective.
YES
IC6001 (CVIC) is defective.
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