Sharp LC-37SD1E Service Manual page 62

LC-37SA1E/RU
<When EXT4 is used for external input>
No EXT4 (15pin-D-SUB terminal) output of the external input
system.
Checklist:
1) Is "INPUT SOURCE" button
2) Connect the included D-SUB-Adapter-Cable to the COMPONENT terminal of an external device. ••• See the operation manual (use a commer-
cially available Component-Cable to connect to the external device).
3) Is ANT-CABLE disconnected or connected improperly? ••• Connect it correctly as per the operation manual.
Is "EXT4" selected with "INPUT SOURCE" button
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)?
Is LVDS signal (LVDS_0N/0P-3N/3P) sent from pins (141) and
(140) - (129) and (128) of IC3002 (VCTP), and is CLK signal
(LVDS_CN/CP) sent from pins (132) and (131)?
Is LVDS signal (LVDS_0N/0P-3N/3P) sent to pins (13) and (12) -
(25) and (24) of CONNECTOR CN1 in LCD-CONT-UNIT, and is
CLK signal (LVDS_CN/CP) sent to pins (22) and (21)?
Is power (LCD5V) supplied to pins (1) - (4) of CONNECTOR CN1
in LCD-CONT-UNIT?
Replace LCD-CONT-UNIT.
No picture on the display (6)
on the remote control set up correctly? ••• See the operation manual set "INPUT SOURCE" to "EXT4".
YES
on the
YES
YES
YES
YES
YES
YES
NO
Select "EXT4" with "INPUT SOURCE" button
control.
NO Check D-SUB-adaptor and external connection.
NO Check EXT4-TERMINAL and peripheral circuits.
NO Check pins (192), (170) and (133) of BU3.3V power line and
pins (185), (169) and (142) of BU1.8V power line of IC3002
(VCTP), and peripheral circuits.
NO Check CONNECTOR (P2305, CN1) and HARNESS WIRE (LV).
NO Is LCD5V supplied to pins (31) - (28) of CONNECTOR (P2305)?
Check HARNESS WIRE (LV).
4 – 22
on the remote