Sharp XV-Z12000 (serv.man12) Service Manual ▷ View online
39
XV-Z12000
YES
YES
YES
No horizontal synchronization is being supplied from the
external synchronization input. This is not normal.
external synchronization input. This is not normal.
Is the terminal input
connection as specified? Is
the cable tightly
connected?
connection as specified? Is
the cable tightly
connected?
Check the line between
IC2506 and IC2509.
IC2506 and IC2509.
Check the line between
IC2506 and the input
terminal.
IC2506 and the input
terminal.
NO
NO
Is there the horizontal sync
pulse at pin (14) of
IC2506?
pulse at pin (14) of
IC2506?
NO
Use the specified cable.
Reconnect it tight enough.
Reconnect it tight enough.
Is there the horizontal
sync pulse at pin (11) of
IC2509?
sync pulse at pin (11) of
IC2509?
Go to "PC Board
Troubleshooting".
Troubleshooting".
YES
YES
YES
No vertical synchronization is being supplied from the
external synchronization input. This is not normal.
external synchronization input. This is not normal.
Is the terminal input
connection as specified? Is
the cable tightly
connected?
connection as specified? Is
the cable tightly
connected?
Check the line between
IC2506 and IC2509.
IC2506 and IC2509.
Check the line between
IC2501 and the input
terminal.
IC2501 and the input
terminal.
NO
NO
Is there the vertical sync
pulse at pin (14) of
IC2501?
pulse at pin (14) of
IC2501?
NO
Use the specified cable.
Reconnect it tight enough.
Reconnect it tight enough.
Is there the vertical sync
pulse at pin (8) of
IC2509?
pulse at pin (8) of
IC2509?
Go to "PC Board
Troubleshooting".
Troubleshooting".
40
XV-Z12000
YES
NO
Checking the
Component and RGB
Inputs
Are there signals at pins
(34), (36) and (38) of
IC2505?
(34), (36) and (38) of
IC2505?
Check the line from
Q2518 through Q2520 to
Q2523 and its peripheral
circuits.
Q2518 through Q2520 to
Q2523 and its peripheral
circuits.
Check the board-to-board
connections or the
circuits that follow the PC
board.
connections or the
circuits that follow the PC
board.
YES
NO
Check the signal input
circuit or IC2505 and its
peripheral circuits.
circuit or IC2505 and its
peripheral circuits.
Are there signals at pins
(60/30),(58/28),(56/26) and
(51/21) on the board-to-
board section of P3580?
(60/30),(58/28),(56/26) and
(51/21) on the board-to-
board section of P3580?
YES
NO
Checking IC3504 (3D
Noise Reduction) and its
Peripheral Circuits
Are there the input signals
at pins (88) (Y signal) and
(96) (C signal) of IC3504?
at pins (88) (Y signal) and
(96) (C signal) of IC3504?
Check IC3504 and its
peripheral circuits.
peripheral circuits.
Check the line up to the
PC board connector or
the circuits that follow the
PC board.
PC board connector or
the circuits that follow the
PC board.
NO
YES
Are there the output
signals at pins (84) (Y
signal) and (83) (C signal)
of IC3504?
signals at pins (84) (Y
signal) and (83) (C signal)
of IC3504?
Check the signal input
circuit or IC2505 and its
peripheral circuits.
circuit or IC2505 and its
peripheral circuits.
41
XV-Z12000
NO
YES
Check the PCI/F unit.
Can the menu display be
brought up?
brought up?
Check OSD.
Check the RGB input.
Check the VIDEO input.
Check the DVI digital input.
End
Check the input at the
components.
components.
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 (IC8025), the
check that would otherwise be performed
after the CVIC does not need to be
performed.
(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 (IC8025), the
check that would otherwise be performed
after the CVIC does not need to be
performed.
(480i and 576i are excluded.)
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.)
as the RGB input.
Mainly, check the SOG (Sync On Green)
circuit and the color adjustment circuit.
(480i and 576i are excluded.)
Since the VIDEO input enters CVIC through
a different route than the RGB input, check
the VIDEO IC.
(480i and 576i are excluded.)
a different route than the RGB input, check
the VIDEO IC.
(480i and 576i are excluded.)
The signal is reproduced in an IC specially
designed for use with the Panel Link, and it
enters the CVIC.
designed for use with the Panel Link, and it
enters the CVIC.
Check the 480iRGB (or
component) input.
component) input.
Check the DVI analog 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.
through the same circuits as the RGB input.
However, since the synchronization signal
uses the VIDEO IC, check the
synchronization signal path.
42
XV-Z12000
NO
YES
NO
YES
Check OSD.
Press the key on the main
unit or the [MENU] key on the
remote control.
Is the menu display brought
up?
unit or the [MENU] key on the
remote control.
Is the menu display brought
up?
Is there a clock signal at
R8974?
R8974?
Is a synchronization signal
present at TL8026 - 28?
present at TL8026 - 28?
End.
Is a clock signal (37.125
MHz) present at TL8114?
MHz) present at TL8114?
IC8025 (CVIC) is defective.
NO
YES
NO
YES
IC8029 (GA4) is defective.
YES
Is there a clock signal at
FL8110?
FL8110?
NO
X8005 is defective.
IC8029 (GA4) is defective.
YES
Is a synchronization signal
present at TL8112 and
TL8113?
present at TL8112 and
TL8113?
Check FL8141 - FL8148 using
an oscilloscope. Is the signal
seen correct?
an oscilloscope. Is the signal
seen correct?
NO
YES
The J5 connector or the
formatter unit is defective.
formatter unit is defective.
Is there a signal at TL8106 -
TL8111?
TL8111?
YES
NO
IC8025 (CVIC) is defective.
IC8029 (GA4) is defective.
NO
IC8025 (CVIC) is defective.
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