LC-32SD1EA (serv.man6). Troubleshooting Table - Sharp TV Service Manual (repair manual). Page 6

LC-32SD1EA/RUA, LC-32ST1EA/RUA

5 – 6

                                            
No EXT3 output of the external input system.

                                            
Checklist: 

1) Is “INPUT SOURCE” button 

on the remote control set up correctly? 

••• See the operation manual and set “INPUT SOURCE” to “EXT3”.

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 composite video signal sent to pin (1) of A/V-IN-TERMINAL 
(J1201)?

NO

Check external connection, input setting, A/V-IN-TERMINAL 
(J1201) and peripheral circuits. 

YES

Is composite video signal (IN3-CVBS) sent to input terminal pin
(4) of IC1201 (SW)? 

NO

Check AV-IN-TERMINAL (J1201) and peripheral circuits.

YES

Is composite video signal (CVBS=VIN7) sent to input terminal pin 
(184) of IC3002 (VCT)? 

NO

Check CONNECTOR (SC2703/P1102), IC3002 (VCT) and 
peripheral circuits.

YES

Is LVDS signal (LVDS_0N/0P-3N/3P) sent from pins (141) and 
(140) - (129) and (128) of IC3002 (VCT), 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 (VCT), 
and peripheral circuits.

YES

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)? 

NO

Check CONNECTOR (P2305, CN1) and HARNESS WIRE (LV).

YES

Is power (LCD5V) supplied to pins (1) - (4) of CONNECTOR CN1 
in LCD-CONT-UNIT?

NO

Is LCD5V supplied to pin (31) - (28) of CONNECTOR (P2305)?
Check HARNESS WIRE (LV).

YES

Replace LCD-CONT-UNIT.