Sharp LC-42RD2E (serv.man4) Service Manual ▷ View online
LC-42RD2E/S/RU
4 – 17
No picture on the display (14)
No EXT7 output of the external input system.
Checklist:
1) Is “INPUT SOURCE” button
1) Is “INPUT SOURCE” button
on the remote control set up correctly?
••• See the operation manual and set “INPUT SOURCE” to “EXIT7”.
2) Is MENU-PICTURE-CONTRAST/BRIGHTNESS set to “MIN”?
••• Set it to an appropriate level.
3) Check the connection to the external device
••• Connect it correctly as per the operation manual for the device.
Is composite video signal sent to pin (6) of A/V-IN-TERMINAL
(J1401)?
NO
Check external connection, input setting, A/V-IN-TERMINAL
(J1401) and peripheral circuits.
(J1401) and peripheral circuits.
YES
Is composite video signal (EX-CVBS) sent to input terminal pin
(1) of IC2801 (SW)?
(1) of IC2801 (SW)?
NO
Check CONNECTOR (P1401/P2791) and peripheral circuits.
YES
Is composite video signal (EX-CVBS=VIN7) sent to input terminal
pin (184) of IC3001 (VCT)?
pin (184) of IC3001 (VCT)?
NO
Check IC2801, IC3001 (VCT) and peripheral circuits.
YES
Refer to “No video output in all modes”.
LC-42RD2E/S/RU
4 – 18
<During external connection> No picture on the monitor (1)
SCART1:
No picture appears on EXT1 - connected monitor during the tuner
(U/V) reception.
No picture appears on EXT1 - connected monitor during the tuner
(U/V) reception.
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 the Signal Type (item) in MENU-Option-Input Select equal to Signal Type of an external device?
••• Set it to “CVBS”, “Y/C” or “RGB”.
3) Is ANT-CABLE disconnected or connected improperly?
••• Connect it correctly as per the operation manual.
4) The picture is sent to the monitor in a CVBS signal if the source during display is TV, CVBS or Y/C of EXT1-3.
When sent by component, etc., that signal is not sent to the monitor.
5) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
6) The video output from EXT1 is not the monitor output (output of the picture now watching).
6) The video output from EXT1 is not the monitor output (output of the picture now watching).
The picture of the last selected TV channel is always sent to EXT1. (Specification)
Is video signal sent to pin (19) of SCART1 (J1101)?
YES
Check SCART1, external connection or input setting.
NO
Is video signal (V-OUT1) sent from pin (2) of IC1102 (SW)?
YES
Check SCART1 (J1101) and peripheral circuits.
NO
Is video signal (V-OUT1) sent from pin (195) of IC3001 (VCT)?
YES
Check IC1102 (SW), Connector (SC2801, P1101) and peripheral
circuits.
circuits.
NO
Is video signal (CVBS) sent to pin (191) of lC3001?
YES
Check power supply of IC3001 and peripheral circuits.
NO
Is video signal (CVBS) sent from pin (17) of IC201 (IF-DEMOD)?
YES
Check CONNECTOR (P201, SC2742) and peripheral circuits.
NO
Is video signal (IF) sent from pin (17) of tuner (TU201)?
YES
Check IC201, FL201 (SAW-FIL), Q202 and peripheral circuits.
NO
Check +5V (CONT) power supply pins (1) and (2), I2C line pins
(15) and (14) of tuner (TU201) and peripheral circuits.
(15) and (14) of tuner (TU201) and peripheral circuits.
LC-42RD2E/S/RU
4 – 19
<During external connection> No picture on the monitor (2)
SCART2:
No picture from EXT1 appears on EXT2-connected monitor.
No picture from EXT1 appears on EXT2-connected monitor.
NOTE: Normally, if the screen during display is sent to EXT2, no
picture is sent to EXT2.
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 the Signal Type (item) in MENU-Option-Input Select equal to Signal Type of an external device?
••• Set it to “CVBS”, “Y/C” or “RGB”.
3) Is ANT-CABLE disconnected or connected improperly?
••• Connect it correctly as per the operation manual.
4) The picture is sent to the monitor in a CVBS signal if the source during display is TV, CVBS or Y/C of EXT1-3.
When sent by component, etc., that signal is not sent to the monitor.
5) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
6) The video output from EXT1 is not the monitor output (output of the picture now watching).
6) The video output from EXT1 is not the monitor output (output of the picture now watching).
The picture of the last selected TV channel is always sent to EXT1. (Specification)
Is video signal sent to pin (40) of SCART2 (J1101)?
YES
Check SCART2, external connection or input setting.
NO
Is video signal (V-OUT2) sent from pin (2) of IC1101 (SW)?
YES
Check SCART2 (J1101) and peripheral circuits.
NO
Is video signal (V-OUT2) sent from pin (194) of IC3001 (VCT)?
YES
Check IC1101 (SW), Connector (SC2801, P1101) and peripheral
circuits.
circuits.
NO
Is video signal (VIN2) from EXT1 sent to pin (190) of IC3001
(VCT)?
(VCT)?
YES
Check power supply of IC3001 (VCT) and peripheral circuits.
NO
Check whether video signal is sent to pin (20) of SCART1.
YES
Check SCART1, IC2802 (SW), CONNECTOR (SC2801, P1101)
and peripheral circuits.
and peripheral circuits.
NO
Check SCART1, external connection or input setting.
LC-42RD2E/S/RU
4 – 20
<During external connection> No picture on the monitor (3)
SCART2:
No picture from EXT3 appears on EXT2- connected monitor.
No picture from EXT3 appears on EXT2- connected monitor.
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 the Signal Type (item) in MENU-Option-Input Select equal to Signal Type of an external device?
••• Set it to “CVBS”, “Y/C” or “RGB”.
3) Is ANT-CABLE disconnected or connected improperly?
••• Connect it correctly as per the operation manual.
4) The picture is sent to the monitor in a CVBS signal if the source during display is TV, CVBS or Y/C of EXT1-3.
When sent by component, etc., that signal is not sent to the monitor.
5) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
6) The video output from EXT1 is not the monitor output (output of the picture now watching).
6) The video output from EXT1 is not the monitor output (output of the picture now watching).
The picture of the last selected TV channel is always sent to EXT1. (Specification)
Is video signal sent to pin (40) of SCART2 (J1101)?
YES
Check SCART2, external connection or input setting.
NO
Is video signal (V-OUT2) sent from pin (2) of IC1101 (SW)?
YES
Check SCART2 (J1101) and peripheral circuits.
NO
Is video signal (V-OUT2) sent from pin (194) of IC3001 (VCT)?
YES
Check IC1101 (SW), Connector (P1102, SC2802) and peripheral
circuits.
circuits.
NO
Is video signal (VIN7) from EXT3 sent to pin (184) of IC3001
YES
Check power supply of IC3001 (VCT) and peripheral circuits.
NO
Is video signal (IN3YV) sent to pin (2) of IC1201(SW)?
YES
Check pin (184) of IC3001, IC2801 (SW), CONNECTOR (P1102,
SC2802) and peripheral circuits.
SC2802) and peripheral circuits.
NO
Is video signal (CVBS) sent from pin (1) of A/V-TERMINAL
(J1201=EXT3)
(J1201=EXT3)
YES
Check pin (1) (IN3SW) of IC1201 (SW), power supply and
peripheral circuits.
peripheral circuits.
NO
Check A/V-TERMINAL (J1201), external connection or input set-
ting.
ting.