Sharp LC-26SH330, Service Manual

Page: 65 / 223

2008-03-14
LC-26SH330, LC-32SH330, LC-42SH330
65
<External input SCART1>No picture on the display (5)
↓
Does not the picture of the R/G/B video signal input to SCART1 go out?
TERMINAL UNIT:
↓
MAIN_UNIT:
↓ YES
↓ YES
<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>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
Is RGB signal sent to pin (15)/R, (11)/G, (7)/B, of SCART1
(CN151)?
NO
Check the setting of an external input device that connects of
CN151.
Refer to
“
The picture doesn't appear in all modes.
”
Is RGB signal sent to pin (AU30)/R, (AP29)/G, (AR28)/B of IC
U401?
NO
Check the line between IC U401 and CN151.
Is Y/C signal sent to pin (20) and (15) of SCART1 (CN151)?
NO
Refer to
“
The picture doesn't appear in all modes.
”
NO Is Y/C signal sent to pin (20) and (15) of SCART2 (CN152)?
Is Y/C signal sent to pin (AP33)/Y, (AU30)/C of IC U401?
Is Y/C signal sent to pin (AT33)/Y, (AR34)/C of IC U401?
NO
NO
Check the line between IC U401 and CN151.
Check the line between IC U401 and CN152.
Check the setting of an external input device that connects of
CN151.
Check the setting of an external input device that connects of
CN152.
Is CVBS signal sent to pin (2) of AV3 (CN136)?
NO
Check the setting of an external input device that connects of
CN136.
Refer to
“
The picture doesn't appear in all modes.
”
Is CVBS signal sent to pin (AU36) of IC U401?
NO
Check the line between IC U401 and CN136.