Read Sharp LC-32DH66E (serv.man4) Service Manual online
LC-32D65E/RU, LC-37D65E/RU
4 – 15
<LC-32/37DH65E>
<During external connection> No picture on the monitor (3)
No picture appears on EXT1/EXT2 connected monitor during the DTV(H.264) reception.
Is CVBS signal output into pin (19) of EXT1 (SC502) from pin
(67) of IC503 (AV_SW)?
(67) of IC503 (AV_SW)?
YES
Check the setting of an external input device that connects with
EXT1.
EXT1.
Is CVBS signal output into pin (19) of EXT2 (SC501) from pin
(65) of IC503 (AV_SW)?
(65) of IC503 (AV_SW)?
YES
Check the setting of an external input device that connects with
EXT2.
EXT2.
NO
Is H.264_CVBS signal input to pin (28) of IC503 (AV_SW)?
YES
Check the IC503 and their peripheral circuits.
NO
Is H.264_CVBS signal output from pin (C34) of IC5001 (H.264
DECODER)?
DECODER)?
YES
Check the line between IC5001 and IC503.
NO
Check the IC5001 and its peripheral circuits.
<During external connection> No picture on the monitor (4)
No picture from EXT1 appears on EXT2-connected monitor.
Is CVBS signal output into pin (19) of EXT2 (SC501)?
YES
Check the setting of an external input device that connects with
EXT2.
EXT2.
NO
Is CVBS signal output to pin (65) of IC503?
YES
Check the line between IC503 and EXT2 (SC501).
NO
Is CVBS signal sent to pin (100) of IC503?
YES
Check the IC503 and peripheral circuits.
NO
YES
Is the I2C SERIAL DATA/CLOCK communication normal?
Pin32: SDA1/Pin31: SCL1
Pin32: SDA1/Pin31: SCL1
Is CVBS signal sent to pin (20) of EXT1(SC502)?
YES
Check the line between EXT1(SC502) and IC503.
NO
Check the setting of an external input device that connects with
EXT1.
EXT1.
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