Sharp LC-32X20E Service Manual page 70

LC-32X20E/S/RU, LC-37X20E/S/RU
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)
TERMINAL UNIT:
Is CVBS signal outputted from pin (2) of IC1501 (SW) to pin (19)
of SC502 (SCART1)?
Is DTV_CVBS signal sent to pin (4) of IC503 (SW)?
MAIN UNIT:
Is DTV_CVBS signal output to pin (54) of connector (SC1101)?
Is DTM_CVBS signal output to pin (AD4) of IC8101?
Check the IC8101 and its peripheral circuits.
<During external connection> No picture on the monitor (2)
NO
NO
NO
NO
YES Check the setting of an external input device that connects of
SC502.
YES Check the IC501 (SW), IC503 (SW) and their peripheral circuits.
YES Check the line between SC1101 (MAIN_UNIT)/ SC501 (TERMI-
NAL UNIT) and IC503.
YES Check the line between IC8101 and SC1101.
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