Read Sharp LC-32XL8E (serv.man4) Service Manual online
LC-32XL8E/S/RU, LC-37XL8E/S/RU
4 – 20
<During external connection> No picture on the monitor (2)
SCART1:
No picture appears on EXT1 - connected monitor during the tuner (DTV) reception.
No picture appears on EXT1 - connected monitor during the tuner (DTV) reception.
TERMINAL UNIT:
Is CVBS signal output into pin (19) of SC502 (SCART1) from pin
(2) of IC501 (SW)?
Is CVBS signal output into pin (19) of SC502 (SCART1) from pin
(2) of IC501 (SW)?
YES
Check the setting of an external input device that connects of
SC502.
SC502.
NO
Is DTV_CVBS signal sent to pin (4) of IC503 (SW)?
YES
Check the IC501 (SW), IC503 (SW) and their peripheral circuits.
MAIN UNIT:
NO
Is DTV_CVBS signal output to pin (54) of connector (SC1101)?
YES
Check the line between SC1101 (MAIN_UNIT)/ SC501 (TERMI-
NAL UNIT) and IC503.
NAL UNIT) and IC503.
NO
Is DTM_CVBS signal output to pin (AD4) of IC8101?
YES
Check the line between IC8101 and SC1101.
NO
Check the IC8101 and its peripheral circuits.
<During external connection> No picture on the monitor (3)
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.
TERMINAL UNIT:
Is CVBS signal input from pin (51) of IC506 to pin (19) of
SCART2 (SC503)?
Is CVBS signal input from pin (51) of IC506 to pin (19) of
SCART2 (SC503)?
YES
Check the setting of an external input device that connects of
SC503.
SC503.
NO
Is CVBS signal sent to pin (65) of IC506 (VIDEO_SELECTOR)?
YES
Check the IC506 and its peripheral circuits.
NO
Is CVBS signal sent to pin (20) of SCART1 (SC502)?
YES
Check the line between S502 and IC506.
NO
Check the setting of an external input device that connects of
SC502.
SC502.
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