LC-52XL1E (serv.man3). Adjustment Procedure - Sharp TV Service Manual (repair manual). Page 11

LC-46XL1E/RU, LC-52XL1E/RU

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No EXT1 -Composite output of the external input system.

No EXT1-RGB 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 “EXT1”.

2) Is MENU-Picture-Backlight/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 (20) of 
SCART1 (J1101)?   

NO

Check external connec-
tion, input setting, 
SCART1 and peripheral 
circuits.    

Is RGB signal sent to pins 
(15), (11) and (7) of 
SCART1 (J1101)?    

NO

Check external connection, 
input setting, SCART1 
(J1101) and peripheral cir-
cuits.    

YES

YES

Is composite video signal 
(VIN1 (V)) sent to input 
terminal pin (AB22) of 
IC3002 (V-PRO.)?   

NO

Check CONNECTOR 
(SC2702/P1101), 
SCART1 (J1101) and 
peripheral circuits.     

Is RGB signal (RED1/
GREEN1/BLUE1) sent to 
input terminal pins (Y19) 
(AB19) and (AC18) of 
IC3002 (V-PRO.)?    

NO

Check CONNECTOR 
(SC2702/P1101), SCART1 
(J1101) and peripheral cir-
cuits.     

YES

YES

Is LVDS video signal (TA1

±~TE1±) sent to pins (AB8)/(AC8) - (AB3)/(AC3) of IC3002 (V-PRO.), and is 

CLK signal (CK1

±) sent to pins (AB5)/(AC5)?

Is LVDS video signal (TA2

±~TE2±) sent to pins (AC2)/(AC1) - (V2)/(V1) of IC3002 (V-PRO.), and is 

CLK signal (CK2

±) sent to pins (Y2)/(Y1)?

NO

Check pins (G14)/(U10) of 
BU3.3V line of IC3002 (V-
PRO.), pins (G10)/(N17) of 
BU2.5V line, pins (U16)/
(G12) of BU1.8V line and 
peripheral circuits.

YES

Check the FRC- circuit.
Refer to sheet of FRC (100Hz). (P4-20)

YES

Is LVDS video signal (TA1

±~TE1±) sent to pins (3)/(2) - (18)/(17) of CONNECTOR CN1 of LCD-

CONT-UNIT, and is CLK signal (CK1

±) sent to pins (12)/(11)?

Is LVDS video signal (TA2

±~TE2±) sent to pins (21)/(20) - (36)/(35) of CONNECTOR CN1 of LCD-

CONT-UNIT, and is CLK signal (CK2

±) sent to pins (30)/(29)?

NO

Check CONNECTOR 
(SC6211, CN1) and HAR-
NESS WIRE.

YES

Is power (+12V) supplied to pins (1) - (5) of CONNECTOR CN3 in LCD-CONT-UNIT?

NO

Check CONNECTOR (CN3, 
PL) and HARNESS WIRE 
(PL).

YES

Replace LCD-CONT-UNIT.