Sharp LC-26SA1E, Service Manual

Page: 54 / 164

LC-26SA1E/RU, LC-32SA1E/RU
6 – 20
<When EXT4 is used for external input> No picture on the display (6)
No EXT4 (15pin-D-SUB terminal) output of the external input
system.
Checklist:
1) Is “INPUT SOURCE” button on the remote control set up correctly?
•••
See the operation manual set “INPUT SOURCE” to “EXT4”.
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.
YES
Is “EXT4” selected with “INPUT SOURCE” button on the
remote control?
NO
Select “EXT4” with “INPUT SOURCE” button on the remote
control.
YES
Is D-SUB-COMPONENT signal (PCV_R/G/B) sent to pins (1), (2)
and (3) of EXT4-TERMINAL (SC2303)? NO Check D-SUB-adaptor and external connection.
YES
Is D-SUB-COMPONENT signal (PCV_R/G/B=VIN19/20/21) sent
to pins (174), (173) and (172) of IC3002 (VCT)? NO Check EXT4-TERMINAL and peripheral circuits.
YES
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)? 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.
YES
Is LVDS signal (LVDS_0N/0P-3N/3P) sent to pins (12) and (13) -
(24) and (25) of CONNECTOR CN1 in LCD-CONT-UNIT, and is
CLK signal (LVDS_CN/CP) sent to pins (21) and (22)? NO Check CONNECTOR (P2305, CN1) and HARNESS WIRE (LV).
YES
Is power (LCD5V) supplied to pins (2) - (5) of CONNECTOR CN1
in LCD-CONT-UNIT? NO Is LCD5V supplied to pins (31) - (28) of CONNECTOR (P2305)?
Check HARNESS WIRE (LV).
YES
Replace LCD-CONT-UNIT.