LC-52XL1E (serv.man3). Adjustment Procedure - Sharp TV Service Manual (repair manual). Page 16

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

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No EXT5 (HDMI) 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 “EXT5”.

2) Have you checked the type video signal sent from HDMI-connected external device? ... Confirm the type (it should “RGB”, “YCbCr 4:4:4” or 

“YCbCr 4:2:2”).

3) Have you checked the type of Color matrix sent from HDMI-connected external device? ... Confirm the type (it should be “ITU601” or “ITU709”.)
4) Is ANT-CABLE disconnected or connected improperly? ... Connect it correctly as per the operation manual

                                             

Is “EXT5” selected with

button on the remote control?

NO

Select “EXT5” with 

button on the remote control.

YES

Is the type of video signal (Signal Type) from HDMI- connected 
external device set?

NO

From MENU-Connections-HDMI setup-EXT5-Signal type, select 
a signal type (“RGB”, “YCbCr 4:4:4” or “YCbCr 4:2:2”).

YES

Is the type of color signal (Color matrix) from HDMl -connected 
external device set?

NO

From MENU-Connections-HDMI setup-EXT5-Color Matrix, 
select a color signal type (“ITU601” or “ITU709”).

YES

Is TMDS signal (RX*

±signal) sent to pins (1) - (12) of EXT5 

(HDMI) terminal (SC1901)?

NO

Is I2C signal (SDA/SCL signal) sent to pins (16) and (15) of 
EXT5 (HDMI) terminal? Check external connection and periph-
eral circuits.

YES

Is 8bit-DIGITAL signal (HDMI- R/G/B) sent from pins (110)- (144) 
of IC1905 (HDMI-RECEIVER)?

NO

Check power supply (3.3/1.8V) pins (99) and (74) of IC1905,
SDA/SCL signal pins (29) and (30), and peripheral circuits.

YES

Is 8bit-DIGITAL signal (HDMI- R/G/B) sent to pins (B10) - (D15) of 
IC3002 (V-PRO.)?

NO

Check SDA3/SCL3 signal pins (27) and (28), interface between 
IC1905 and lC3002, and peripheral circuits.

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 sig-
nal (CK2

±) sent to pins (30)/(29)?

NO

Check CONNECTOR (SC6211, CN1) and HARNESS 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.