Read Sharp LC-32XL8E (serv.man4) Service Manual online
LC-32XL8E/S/RU, LC-37XL8E/S/RU
4 – 19
<During external connection> No picture on the monitor (1)
No picture appears on EXT1 - connected monitor during the tuner (U/V) reception.
TERMINAL UNIT:
Is CVBS signal output into pin (19) of SC502 (SCART1) from pin
(2) of IC501 (SW)?
Is CVBS signal output into pin (19) of SC502 (SCART1) from pin
(2) of IC501 (SW)?
YES
Check the setting of an external input device that connects of
SC502.
SC502.
NO
Is TUNRE_CVBS signal sent to pin (6) of IC503 (SW)?
YES
Check the IC501 (SW), IC503 (SW) and their peripheral circuits.
NO
Is TUNRE_CVBS signal output from pin (17) of IC7504 (IF-
DEMOD)?
DEMOD)?
YES
Check the line between IC7504 and IC503.
(Q7505, IC7508, etc.)
(Q7505, IC7508, etc.)
NO
Is IF signal output from pin (17) of TUNRE (TU7501)?
YES
Check the IC7504/FL7502 (VIF_SAW) and its peripheral circuits.
NO
Check whether I2C is normally accessed between TU7501 and
IC7504 (IF-DEMOD).
IC7504 (IF-DEMOD).
Click on the first or last page to see other LC-32XL8E (serv.man4) service manuals if exist.