Sharp LC-52DH65E Service Manual page 47

No picture from EXT1 appears on EXT2-connected monitor.
Is CVBS signal output into pin (19) of EXT2 (SC501)?
Is CVBS signal output to pin (65) of IC503?
Is CVBS signal sent to pin (100) of IC503?
Is CVBS signal sent to pin (20) of EXT1(SC502)?
Check the setting of an external input device that connects with
EXT1.
SCART2:
No picture from EXT8 appears on EXT2- connected monitor.
Is CVBS signal output into pin(19) of EXT2 (SC501)?
Is CVBS signal output to pin (65) of IC503?
Is CVBS signal sent to pin (12) of IC503?
Is CVBS signal sent to pin (6) of EXT8(J505)?
Check the setting of an external input device that connects with
EXT8.
<During external connection> No picture on the monitor (3)
NO
NO
NO
NO
<During external connection> No picture on the monitor (4)
NO
NO
NO
YES
YES Check the setting of an external input device that connects with
EXT2.
YES Check the line between IC503 and EXT2 (SC501).
YES Check the IC503 and peripheral circuits.
Is the I2C SERIAL DATA/CLOCK communication normal?
Pin32: SDA1/Pin31: SCL1
YES Check the line between EXT1(SC502) and IC503.
YES Check the setting of an external input device that connects with
EXT2.
YES Check the line between IC503 and EXT2(SC501).
YES Check the IC503 and peripheral circuits.
YES Check the line between EXT8(J505) and IC503.
NO Is V3_PLUGl detection signal to pin(13) of IC503 input from
pin(7) of EXT8 (J505)?
4 – 13
LC-52DH65E/S, LC-52DH66E
YES