LC-37RD2E (serv.man5). Troubleshooting Table - Sharp TV Service Manual (repair manual). Page 20

LC-32RD2E/RU, LC-37RD2E/RU

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SCART2:                             
No picture from EXT3 appears on EXT2- connected monitor.

                                            
Checklist: 

1) Are input terminal on back of TV and “INPUT SOURCE” button 

on the remote control set up correctly? 

••• See the operation manual and 

set “INPUT SOURCE” appropriately.

2) Is the Signal Type (item) in MENU-Option-Input Select equal to Signal Type of an external device? 

••• Set it to “CVBS”, “Y/C” or “RGB”.

3) Is ANT-CABLE disconnected or connected improperly? 

••• Connect it correctly as per the operation manual.

4) The picture is sent to the monitor in a CVBS signal if the source during display is TV, CVBS or Y/C of EXT1-3.

When sent by component, etc., that signal is not sent to the monitor.

5) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
6) The video output from EXT1 is not the monitor output (output of the picture now watching).

The picture of the last selected TV channel is always sent to EXT1. (Specification)

                                             
Is video signal sent to pin (40) of SCART2 (J1101)?

YES

Check SCART2, external connection or input setting. 

NO

Is video signal (V-OUT2) sent from pin (2) of IC1101 (SW)?

YES

Check SCART2 (J1101) and peripheral circuits.

NO

Is video signal (V-OUT2) sent from pin (194) of IC3001 (VCT)?

YES

Check IC1101 (SW), Connector (P1102, SC2802) and peripheral 
circuits.

NO

Is video signal (VIN7) from EXT3 sent to pin (184) of IC3001 

YES

Check power supply of IC3001 (VCT) and peripheral circuits.

NO

Is video signal (IN3YV) sent to pin (2) of IC1201(SW)? 

YES

Check pin (184) of IC3001, IC2801 (SW), CONNECTOR (P1102, 
SC2802) and peripheral circuits.

NO

Is video signal (CVBS) sent from pin (1) of A/V-TERMINAL 
(J1201=EXT3)

YES

Check pin (1) (IN3SW) of IC1201 (SW), power supply and 
peripheral circuits.

NO

Check A/V-TERMINAL (J1201), external connection or input set-
ting.