Read Sharp LC-37RD2E (serv.man5) Service Manual online
LC-32RD2E/RU, LC-37RD2E/RU
4 – 13
<When EXT3 is used for external input> No picture on the display (9)
No EXT3 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 “EXIT3”.
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 (1) of A/V-IN-TERMINAL
(J1201)?
NO
Check external connection, input setting, A/V-IN-TERMINAL
(J1201) and peripheral circuits.
(J1201) and peripheral circuits.
YES
Is composite video signal (IN3-CVBS) sent from pins (2) of
IC1201 (SW)?
IC1201 (SW)?
NO
Check IC1201 and peripheral circuits.
YES
Is composite video signal (IN3-CVBS) sent to input terminal pin
(3) of IC2801 (SW)?
(3) of IC2801 (SW)?
NO
Check CONNECTOR (P1102/SC2802), and peripheral circuits.
YES
Is composite video signal (IN3-CVBS=VIN7) sent to input termi-
nal pin (184) of IC3001 (VCT)?
nal pin (184) of IC3001 (VCT)?
NO
Check IC2801 (SW) and peripheral circuits.
YES
Refer to “No video output in all modes”.
<When EXT3 is used for external input> No picture on the display (10)
No EXT3-Y/C 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 “EXIT3”.
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 Y/C signal sent to pins (11) and (7) of S-TERMINAL (J1201)?
NO
Check external connection, input setting, S-TERMINAL (J1201)
and peripheral circuits.
and peripheral circuits.
YES
Is Y3 signal (IN3-Y) sent from pin (2) of IC1201 (SW)?
NO
Check IC1201 and peripheral circuits.
YES
Is Y3 signal (IN3-Y) sent to input terminal pin (3) of IC2801 (SW)?
NO
Check CONNECTOR (P1102/SC2802), and peripheral circuits.
YES
Is Y/C signal (VIN7/VIN8) sent to input terminal pins (184) and
(183) of IC3001 (VCT)?
(183) of IC3001 (VCT)?
NO
Check IC2801 (SW) and peripheral circuits.
YES
Refer to “No video output in all modes”.
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