Sharp LC-32SH25E, Service Manual

Page: 35 / 113

2008-03-14
LC-32SH25E
35
<External input SCART1, SCART2>No picture on the display (6)
↓
Does not the picture of the Y/C signal input to SCART1 go out?
Does not the picture of the Y/C signal input to SCART2 go out?
TERMINAL UNIT:
↓
MAIN_UNIT:
↓
YES
↓
YES
<External input AV3(Composite)>No picture on the display (7)
↓
Does not the picture of the composite video signal input to AV3(Composite) go out?
TERMINAL UNIT:
↓
MAIN_UNIT:
↓
YES
↓
YES
<External input AV3(Y/C)>No picture on the display (8)
↓
Does not the picture of the Y/C video signal input to AV3(Y/C) go out?
TERMINAL UNIT:
↓
MAIN_UNIT:
↓
YES
↓
YES
Is Y/C signal sent to pin (20) and (15) of SCART1 (CN500)?
NO
Refer to “ The picture doesn't appear in all modes. ”
NO Is Y/C signal sent to pin (20) and (15) of SCART2 (CN501)?
Is Y/C signal sent to pin (AE24)/Y, (AF25)/C of IC U400?
Is Y/C signal sent to pin (AE26)/Y, (AE25)/C of IC U400?
NO
NO
Check the line between IC U400 and CN500.
Check the line between IC U400 and CN501.
Check the setting of an external input device that connects of
CN500.
Check the setting of an external input device that connects of
CN501.
Is CVBS signal sent to pin (2) of AV3 (CN650) ?
NO
Check the setting of an external input device that connects of
CN650.
Refer to
“
The picture doesn't appear in all modes.
”
Is CVBS signal sent to pin (AC24) of IC U400?
NO
Check the line between IC U400 and CN650.
Is Y/C signal sent to pin (8)/Y, (7)/C of AV3 (CN650) ?
NO
Check the setting of an external input device that connects of
CN650.
Refer to “ The picture doesn't appear in all modes. ”
Is Y/C signal sent to pin (AD26)/Y, (AD25)/C of IC U400?
NO
Check the line between IC U400 and CN650.