LC-37XD1E (serv.man4). Troubleshooting Table - Sharp TV Service Manual (repair manual). Page 11

LC-37XD1E/RU

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<Durlng external connectlon>                                                                     

No picture on the monitor (2) -2

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-Connection-Input-Select set to the same as that of the 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 con-
nection 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 (Y20) of  IC3002 
(V-PRO.) ?  

YES

Check IC1101(SW), Connector 
(P1102,SC2703) and peripheral 
circuits.     

NO

Is video signal  (IN3Y) from EXT3 
sent to pin (AB20) of IC3002 (V-
PRO.)?   

YES

Check power supply of IC3002  
(V-PRO.) and  peripheral circuits.     

NO

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

YES

Check pin (AB20) of  IC3002 (V-
PRO.), CONNECTOR  (SC2703, 
P1102)  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.