Sharp TU-X1E (serv.man7) Service Manual ▷ View online
TU-X1E/RU
6 – 13
<During external connectlon>
No picture on the Exterior Monitor (3)-1
EXT1(SCART1):
No picture appears on EXT1 -connected
External monitor during the DTV or tuner
(U/V) reception.
No picture appears on EXT1 -connected
External monitor during the DTV or tuner
(U/V) reception.
Check SCART1, external
connection or input setting.
connection or input setting.
Is video signal (OUTV_SC1) output
from pin (67) of IC503 (AV-SW)?
from pin (67) of IC503 (AV-SW)?
Check pin (40) of SCART1 (J501)
and peripheral circuits.
and peripheral circuits.
Is video signal output to pin (40) of
SCART1 (J501)?
SCART1 (J501)?
YES
YES
NO
NO
Is IF video signal (TUNER_CVBS)
output from pin (6) of Tuner
(TU7501)?
output from pin (6) of Tuner
(TU7501)?
Check the B5V/IF-5V/5V(CONT)
power supply input pins (11)/(3)/(1) of
Tuner (TU7501), pins (9)(8) of I2C
line, and soldering.
power supply input pins (11)/(3)/(1) of
Tuner (TU7501), pins (9)(8) of I2C
line, and soldering.
Checklist:
1) Are input terminal on back of TV and "INPUT SOURCE "button
on the remote control set up correctly ?
See the operation manual and
set "INPUT SOURCE "appropriately.
2) Is SCART-CABLE disconnected or connected improperly?
Connect it correctly according to the operation manual.
3) When the monitor picture is not sent and is not displayed on the monitor, refer to "No picture" for each terminal.
Check pin (24) of IC503 (AV-SW),
PB harness and IC7505(VCA).
PB harness and IC7505(VCA).
YES
NO
[TERMINAL-UNIT]
[TUNER-UNIT]
<During external connectlon>
No picture on the Exterior Monitor (3)-2
Checklist:
1) Are input terminal on back of TV and "INPUT SOURCE "button
on the remote control set up correctly ?
See the operation manual and
set "INPUT SOURCE "appropriately.
2) Is SCART-CABLE disconnected or connected improperly?
Connect it correctly according to the operation manual.
3) When the monitor picture is not sent and is not displayed on the monitor, refer to "No picture" for each terminal.
Check SCART2 , external
connection or input setting.
connection or input setting.
Is video signal (OUTV) output from pin
(65) of IC503 (AV-SW)?
(65) of IC503 (AV-SW)?
Check pin (19) of SCART2 (J501)
and peripheral circuits.
and peripheral circuits.
Is video signal output to pin (19) of
SCART2 (J501)?
SCART2 (J501)?
YES
YES
NO
NO
Is IF video signal (TUNER_CVBS)
output from pin (6) of Tuner
(TU7501)?
output from pin (6) of Tuner
(TU7501)?
Check the B5V/IF-5V/5V(CONT)
power supply input pins (11)/(3)/(1) of
Tuner (TU7501), pins (9)(8) of I2C
line, and soldering.
power supply input pins (11)/(3)/(1) of
Tuner (TU7501), pins (9)(8) of I2C
line, and soldering.
YES
NO
EXT2(SCART2):
No picture appears on EXT2 -connected
External monitor during the DTV or tuner
(U/V) reception.
No picture appears on EXT2 -connected
External monitor during the DTV or tuner
(U/V) reception.
Check pin (24) of IC503 (AV-SW),
PB harness and IC7505(VCA).
PB harness and IC7505(VCA).
TU-X1E/RU
6 – 14
[MAIN-UNIT]
<When EXT1 is used for external input>
No picture on the display (4)-1
No EXT1-Composite output of
the external input system.
the external input system.
Is RGB signal (SCART-R/G/B)
sent to pins (86), (82) and (84)
of IC503 (AV-SW) ?
sent to pins (86), (82) and (84)
of IC503 (AV-SW) ?
No EXT1-RGB output of the
external input system.
external input system.
Check SCART1 (J501) and its
peripheral circuits.
peripheral circuits.
YES
NO
YES
YES
Checklist:
1) Is "INPUT SOURCE" button
on the remote control set up correctly?
Set it as "EXT1" with the INPUT SOURCE button on the remote control.
2) Is MENU-Picture-Backlight/Contrast/Brightness set to "MIN"?
Set it to an appropriate level.
3) Check the connection to the external device
Connect it correctly according to the operation manual of external device.
Is composite video signal sent to
pin (41) of SCART1 (J501)?
pin (41) of SCART1 (J501)?
Check external connection, input
setting, SCART1 (J501) and their
peripheral circuits.
setting, SCART1 (J501) and their
peripheral circuits.
Is RGB signal sent to pins (36),
(32) and (28) of SCART1
(J501) ?
(32) and (28) of SCART1
(J501) ?
Check external connection, input
setting, SCART1 (J501) and
their peripheral circuits.
setting, SCART1 (J501) and
their peripheral circuits.
NO
NO
Is composite video signal (VIN1)
sent to pin (100) of IC503
(AV-SW) ?
sent to pin (100) of IC503
(AV-SW) ?
Check SCART1 (J501) and its
peripheral circuits.
peripheral circuits.
NO
YES
YES
NO
NO
YES
YES
NO
Is the MAIN-Y signal (MAIN-Y/V_TR) outputted from pins (71) and (70) of
IC503 (AV-SW), and the MAIN-C signal (MAIN_C_TR) from pin (70) of the
same IC?
IC503 (AV-SW), and the MAIN-C signal (MAIN_C_TR) from pin (70) of the
same IC?
Check the IC503 (AV-SW) power line, pins (52) and (51) of
SDA1/SCL1 lines and their peripheral circuits.
SDA1/SCL1 lines and their peripheral circuits.
Check pins (7) and (5) of MA connector (SC601) and their
peripheral circuits.
peripheral circuits.
Are the MAIN_Y (MAIN-Y/V_TR) and MAIN_C (MAIN_C_TR)signals
outputted to pins (45) and (47) of MA connector (SC2404)?
outputted to pins (45) and (47) of MA connector (SC2404)?
Is the differential HDMI signal (HDMITX_[0:C]
r) outputted properly to pins
(1) thru (12) of HDMI output terminal(SC4801)?
Check the HDMI cable. If it is okay, refer to the Monitor Video
Troubleshooting.
Troubleshooting.
[TERMINAL-UNIT]
Check the IC8101 (CPU), IC4602 (FPGA) and IC4804 (HDMI_Tr)
power, as well as the I2C line. Check also for short-circuit.
power, as well as the I2C line. Check also for short-circuit.
BLOCK-A
Is Y/C signal sent to pins (41)
and (36) of SCART1 (J501)?
and (36) of SCART1 (J501)?
Check external connection, input
setting, SCART1 (J501) and their
peripheral circuits.
setting, SCART1 (J501) and their
peripheral circuits.
No EXT1-Y/C output of the
external input system.
external input system.
YES
Is Y/C signal (Y1/C1) sent to
pins(100) and (86) of IC503
(AV-SW)?
pins(100) and (86) of IC503
(AV-SW)?
Check SCART1 (J501) and its
peripheral circuits.
peripheral circuits.
NO
NO
YES
<When EXT1 is used for external input>
No picture on the display (4)-2
Checklist:
1) Is "INPUT SOURCE" button
on the remote control set up correctly?
Set it as "EXT1" with the INPUT SOURCE button on the remote control.
2) Is MENU-Picture-Backlight/Contrast/Brightness set to "MIN"?
Set it to an appropriate level.
3) Check the connection to the external device
Connect it correctly according to the operation manual of external device.
BLOCK-A
TU-X1E/RU
6 – 15
˴˴˴˴˴˴˴˴˴˴˴˴˴˴˴˴˴˴
<When EXT2 is used for external input>
No picture on the display (5)-1
No EXT2-Composite output of
the external input system.
the external input system.
Is RGB signal (SCART-R/G/B)
sent to pins (92)(88) and (90)
of IC503 (AV-SW) ?
sent to pins (92)(88) and (90)
of IC503 (AV-SW) ?
No EXT2-RGB output of the
external input system.
external input system.
Check SCART2(J501) and
peripheral circuits.
peripheral circuits.
YES
NO
YES
YES
Checklist:
1) Is "INPUT SOURCE" button
on the remote control set up correctly?
set it as "EXT2" with the INPUT SOURCE button on the remote control.
2) Is MENU-Picture-Backlight/Contrast/Brightness set to "MIN"?
Set it to an appropriate level.
3) Check the connection to the external device
Connect it correctly according to the operation manual of external device.
Is composite video signal sent
to pin (20) of SCART2 (J501)?
to pin (20) of SCART2 (J501)?
Check external connection,
input setting, SCART2(J501)
and peripheral circuits.
input setting, SCART2(J501)
and peripheral circuits.
Is RGB signal sent to pins
(15), (11) and (7) of SCART2
(J501) ?
(15), (11) and (7) of SCART2
(J501) ?
Check external connection, input
setting, SCART2 (J501) and
peripheral circuits.
setting, SCART2 (J501) and
peripheral circuits.
NO
NO
Is composite video signal
(VIN1) sent to pin (6) of IC503
(AV-SW)?
(VIN1) sent to pin (6) of IC503
(AV-SW)?
Check SCART2(J501) and
peripheral circuits.
peripheral circuits.
NO
YES
BLOCK-A
Is Y/C signal sent to pins (20)
and (15) of SCART2 (J501) ?
and (15) of SCART2 (J501) ?
Check external connection,
inputsetting, SCART2 (J501)
and peripheral circuits.
inputsetting, SCART2 (J501)
and peripheral circuits.
No EXT2-Y/C output of the
external inut sstem.
external inut sstem.
YES
Is Y/C signal (Y1/C1) sent to
pins (6) and (92) of IC503
(AV-SW)?
pins (6) and (92) of IC503
(AV-SW)?
Check SCART2 (J501) and
peripheral circuits.
peripheral circuits.
NO
NO
YES
<When EXT2 is used for external input>
No picture on the display (5)-2
Checklist:
1) Is "INPUT SOURCE" button
on the remote control set up correctly?
set it as "EXT2" with the INPUT SOURCE button on the remote control.
2) Is MENU-Picture-Backlight/Contrast/Brightness set to "MIN"?
Set it to an appropriate level.
3) Check the connection to the external device
Connect it correctly according to the operation manual of external device.
BLOCK-A
TU-X1E/RU
6 – 16
<When EXT3 is used for external input>
No picture on the display (6)
No EXT3 Component output of the
external input system.
external input system.
YES
Checklist;
1) Is "INPUT SOURCE" button
on the remote control set up correctly?
set it as "EXT3" with the INPUT SOURCE button on the remote control.
2) Is MENU-Picture-Backlight/Contrast/Brightness set to "MIN" ?
Set it to an appropriate level.
3) Check the connection to the external device
Connect it correctly according to the operation manual of external device.
Is Component video signal (Y,Pb,Pr)
sent to EXT-3-TERMINAL(J502)?
sent to EXT-3-TERMINAL(J502)?
Check external connection, input setting,
EXT-3-TERMINAL (J502) and peripheral
circuits.
EXT-3-TERMINAL (J502) and peripheral
circuits.
NO
Is Component video signal (Y,Pb,Pr)
sent to pin (94)(96)(98) of
IC503(AV-SW) ?
sent to pin (94)(96)(98) of
IC503(AV-SW) ?
EXT-3-TERMINAL(J502) and peripheral
circuits.
circuits.
NO
YES
BLOCK-A
Click on the first or last page to see other TU-X1E (serv.man7) service manuals if exist.