Sharp lc-42ad5e Service Manual page 52

LC-42AD5E/RU/S
<When EXT4 is used for external input>
No EXT4 (15pin-D-SUB terminal) output of the external input sys-
tem.
Checklist:
1) Is "INPUT SOURCE" button
2) Is MENU-PICTURE-CONTRAST/BRIGHTNESS set to "MIN"? ••• Set it to an appropriate level.
3) Check the connection to the external device ••• Connect it correctly as per the operation manual for the device.
Is "EXT4" selected with "INPUT SOURCE" button on the remote
control?
Is D-SUB-COMPONENT signal (PCV_R/G/B) sent to pins (1), (2)
and (3) of EXT4-TERMINAL (SC2303)?
Is D-SUB-COMPONENT signal
(PCV_R/G/B=VIN19/20/21) sent to pins (174), (173) and (172) of
IC3002 (VCT)?
Refer to "No video output in all modes".
No picture on the display (11)
on the remote control set up correctly? ••• See the operation manual and set "INPUT SOURCE" to "EXIT4".
YES
YES
YES
NO Select "EXT4" with "INPUT SOURCE" button on the remote con-
trol.
NO Check D-SUB-adaptor and external connection.
NO Check EXT4-TERMINAL and peripheral circuits.
4 – 14