Sharp LC-26SB25E, Service Manual

Page: 48 / 172

LC-26SB25E/S/RU, LC-32SB25E/S/RU, LC-42SB55E/S/RU
48
<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 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 (AD26) 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 (AD25)/Y, (AE26)/C of IC U400?
NO
Check the line between IC U400 and CN650.