Sharp LC-19LE320 Service Manual page 70

LC-19LE320, LC-22LE320, LC-26LE320, LC-32LE320, LC-37LE320, LC-42LE320
Does not the picture of the R/G/B video signal input to SCART1 go out?
TERMINAL UNIT:
Is RGB signal sent to pin (15)/R, (11)/G, (7)/B, of SCART1
(CN151)?
MAIN_UNIT:
Is RGB signal sent to pin (AU30)/R, (AP29)/G, (AR28)/B of IC
U401?
Refer to "The picture doesn't appear in all modes."
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:
Is Y/C signal sent to pin (20) and (15) of SCART1 (CN151)?
Is Y/C signal sent to pin (20) and (15) of SCART2 (CN152)?
MAIN_UNIT:
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?
Refer to "The picture doesn't appear in all modes."
Does not the picture of the composite video signal input to AV3(Composite) go out?
TERMINAL UNIT:
Is CVBS signal sent to pin (2) of AV3 (CN136)?
MAIN_UNIT:
Is CVBS signal sent to pin (AU36) of IC U401?
Refer to "The picture doesn't appear in all modes."
<External input SCART1>No picture on the display (5)
↓
↓
↓YES
↓YES
<External input SCART1, SCART2>No picture on the display (6)
↓
↓
↓YES
↓YES
<External input AV3>No picture on the display (7)
↓
↓
↓YES
↓YES
NO
Check the setting of an external input device that connects of
CN151.
NO
Check the line between IC U401 and CN151.
NO
Check the setting of an external input device that connects of
CN151.
NO
Check the setting of an external input device that connects of
CN152.
NO
Check the line between IC U401 and CN151.
NO
Check the line between IC U401 and CN152.
NO
Check the setting of an external input device that connects of
CN136.
NO
Check the line between IC U401 and CN136.
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