Sharp LC-37D44E Service Manual page 54

LC-37D44E/S/RU-BK/GY
SCART1:
No picture appears on EXT1 - connected monitor during the tuner (DTV) reception.
Checklist:
1) 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".
2) Is ANT-CABLE disconnected or connected improperly? ... Connect it correctly as per the operation manual.
3) 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.
4) When the monitor picture is not sent and is not displayed on the monitor, refer to "No picture" for each terminal.
5) 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 DTV_CVBS signal output from pin(2) of IC1102(SW)
to pin(19) of SC1102(SCART1)?
Is DTV_CVBS signal output from PIN(195) of
IC3001(MAIN_MICON) to PIN(6) of IC1102?
Is video signal (DTV_CVBS) sent to pin (184) of
IC3001?
Is DTV_CVBS signal output from PIN(18) of
IC4001(SET-TOP_BOX_DECODER)?
Check the IC4001 and its peripheral circuits.
<During external connection> No picture on the monitor (2)
YES
NO
YES
NO
YES
NO
YES
NO
Check the setting of an external input device that connects of SC1102.
Check the line between IC1102 and SC1102.
Check power supply of IC3001 and peripheral circuits.
Check the line between IC4001 and IC3001.
(IC1001, EXT_DTV_LINE, etc.)
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