Sharp XV-Z9000E (serv.man3) Service Manual ▷ View online
32
XV-Z9000U/E
TROUBLE SHOOTING TABLE
YES
YES
NO
Checking the basic
performance
Is the POWER LED on or
flickering in red or blue?
flickering in red or blue?
Go to "Checking the
power unit"
power unit"
NO
Is the set turned on by the
set's or remote controller's
power key?
set's or remote controller's
power key?
Go to "Checking the
microcomputer
peripherals" and
"Checking the
microcomputer
peripherals" and
"Checking the
PC PWB".
NO
Check the formatter
circuit’s peripheral circuits.
circuit’s peripheral circuits.
NO
Is the cooling fan
running? Is the lamp on?
running? Is the lamp on?
Is the user menu
displayed?
displayed?
YES
Are there output signals at
pins (32), (34) and (37) of
P3580?
pins (32), (34) and (37) of
P3580?
NO
Is the video input as
specified?
specified?
YES
Are there output signals at
every other pin from pins
(41) to (60) of P3580?
every other pin from pins
(41) to (60) of P3580?
NO
NO
NO
NO
NO
Is the component input as
specified?
specified?
YES
NO
If the RGB input as
specified?
specified?
YES
Are there output signals at
every other pin from pins
(41) to (60) of P3580?
every other pin from pins
(41) to (60) of P3580?
NO
Does the RS-232C
interface function?
interface function?
YES
Are there output signals
at pins (32), (34) and (37)
of P3580?
at pins (32), (34) and (37)
of P3580?
NO
Recommended
communication software:
“TERA TERM”
Make the following settings:
baud rate at 9600 bps, bit
length at 8 bits, stop bit at 1
bit and no parity. Press the
RETURN key on the
keyboard. Does “ERR”
show up again?
communication software:
“TERA TERM”
Make the following settings:
baud rate at 9600 bps, bit
length at 8 bits, stop bit at 1
bit and no parity. Press the
RETURN key on the
keyboard. Does “ERR”
show up again?
YES
Check the IC2505 circuit
and its peripheral circuits.
and its peripheral circuits.
Check the IC2505 circuit
and its peripheral circuits.
and its peripheral circuits.
Check the IC2505 circuit
and its peripheral circuits.
and its peripheral circuits.
Check the IC2005 circuit
and its peripheral circuits.
and its peripheral circuits.
END
YES
Go to "Checking the lamp
light-up".
light-up".
Check the PC board
circuit’s peripheral circuits.
circuit’s peripheral circuits.
33
XV-Z9000U/E
YES
YES
YES
YES
YES
YES
YES
YES
NO
Checking the power unit
Are all the connectors
inside the power unit tightly
connected?
inside the power unit tightly
connected?
Insert the connectors
CN7105, 7103, 7101AND
7102 tightly.
CN7105, 7103, 7101AND
7102 tightly.
Replace the bimetal switch
or press the red button to
reset.
or press the red button to
reset.
Tighten up the lamp door
closed with the screws.
closed with the screws.
NO
Is the lamp cover closed
completely?
completely?
NO
Replace F7002.
NO
Check the circuits leading
to the secondary side of
T7002 for damage.
Replace any of them as
required.
to the secondary side of
T7002 for damage.
Replace any of them as
required.
NO
Is the bimetal switch off?
Is AC voltage applied
across L7005?
across L7005?
Replace F7001.
NO
Is AC voltage applied
across the RL7001 relay?
across the RL7001 relay?
Are there the specified
voltages at the output
terminals of CN7101 and
CN7102?
voltages at the output
terminals of CN7101 and
CN7102?
Check the circuits leading
to the primary side of
T7002 for damage.
Replace any of them as
required.
to the primary side of
T7002 for damage.
Replace any of them as
required.
NO
Is there DC voltage of
about 340 V across
CN7003?
about 340 V across
CN7003?
Check the peripheral
circuits of Q7101~Q7107.
Replace any of them as
required.
circuits of Q7101~Q7107.
Replace any of them as
required.
NO
Is there DC voltage of
about 6 V across C7151?
about 6 V across C7151?
Check the output PWB
circuits.
circuits.
34
XV-Z9000U/E
YES
0
Check the basic signal flow. The signal flow from
CVIC_IC to the panel output is the same for the
component and video signals. Therefore the lines
after CVIC are not checked. (The 480i and 580i
component signals are not included.)
CVIC_IC to the panel output is the same for the
component and video signals. Therefore the lines
after CVIC are not checked. (The 480i and 580i
component signals are not included.)
The signal flows through the same circuits as the
DTV RGB signal does. Check the SOG (Sync On
Green) circuit and the color adjustment circuit. (The
480i and 580i component signals are not included.)
DTV RGB signal does. Check the SOG (Sync On
Green) circuit and the color adjustment circuit. (The
480i and 580i component signals are not included.)
The video signal flows through a different route from
the RGB input signal, and goes into CVIC_IC.
Therefore check the video signal ICs.
the RGB input signal, and goes into CVIC_IC.
Therefore check the video signal ICs.
Check the D-SUB input.
NO
Checking the PC PWB
Is the user menu properly
displayed?
displayed?
Check the on-screen
display.
display.
Check the DTV RGB
input.
input.
Check the VIDEO input.
Check the DTV
component input.
component input.
End
Check the D-SUB input.
35
XV-Z9000U/E
YES
YES
NO
YES
Checking the RGB input
Feed the sync-separated DTV
RGB signal to INPUT1 or
INPUT2. (The 480i and 580i
component signals are not
included.)
RGB signal to INPUT1 or
INPUT2. (The 480i and 580i
component signals are not
included.)
Check to see if the video input is
as specified.
as specified.
Is the contour as specified?
Using the front-panel key or
the remote control, select
INPUT1 or INPUT2.
the remote control, select
INPUT1 or INPUT2.
NO
NO
Is the image disturbed?
Go to "Checking the sync signal".
Do R, G and B colors appear?
Go to "Checking the RGB signal".
NO
IC8004 or its peripheral circuit
defective.
defective.
End
YES
Does the image appear?
1
2
3