LC-32SD1E (serv.man8). Troubleshooting Table - Sharp TV Service Manual (repair manual). Page 22

LC-26SD1E/RU, LC-32SD1E/RU

6 – 22

                                            
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.