Read Sharp LC-42RD2E (serv.man4) Service Manual online
LC-42RD2E/S/RU
4 – 12
<When EXT2 is used for external input> No picture on the display (7)
No EXT2-RGB 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 “EXIT2”.
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 RGB signal sent to pins (36)/R, (32)/G and (28)/B of SCART2
(J1101)?
NO
Check external connection, input setting, SCART2 (J1101) and
peripheral circuits.
peripheral circuits.
YES
Is RGB signal (R2/G2/B2=VIN_15/16/17) sent to Input terminal
pins (178), (177) and (176) of IC3001 (VCT)?
pins (178), (177) and (176) of IC3001 (VCT)?
NO
Check CONNECTOR (P1102/SC2802), SCART2 (J1101) and
peripheral circuits.
peripheral circuits.
YES
Refer to “No video output in all modes”.
<When EXT2 is used for external input> No picture on the display (8)
No EXT2-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 “EXIT2”.
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 (41) and (36) of SCART2 (J1101)?
NO
Check external connection, input setting, SCART2 (J1101) and
peripheral circuits.
peripheral circuits.
YES
Is Y/C signal (VIN2=Y2/C2) sent to input terminal pins (190) and
(178) of IC3001 (VCT)?
(178) of IC3001 (VCT)?
NO
Check CONNECTOR (P1102/SC2802), IC2802 (SW) and
peripheral circuits.
peripheral circuits.
YES
Refer to “No video output in all modes”.
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