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LC-46X8E/S/RU

4 – 13

                                            
The Y/C video signal input from EXT1 doesn’t come out in the display.
The Y/C video signal input from EXT2 doesn’t come out in the display.

TERMINAL UNIT:                 
<EXT1>
Is Y/C video signal sent to pins (20, 15) of SCART1 (SC502)?

NO

Check the setting of an external input device that connects of 
SC502.

<EXT2>
Is Y/C video signal sent to pins (20, 15) of SCART2 (SC503)?

NO

Check the setting of an external input device that connects of 
SC503.

YES

<EXT1>
Is Y/C signal sent to pins (67, 69) of IC506?

NO

Check the line between SC502 and IC506.

<EXT2>
Is Y/C signal sent to pins (73, 75) of IC506?

NO

Check the line between SC503 and IC506.

YES

Is Y/C signal output from pins (52, 50) of IC506 to pins (2, 4) of 
connector (SC501)?

NO

Check the line between IC506 and SC501.

MAIN UNIT:                          

YES

Is Y/C signal sent to pins (2, 4) of connector (SC1101)?

NO

Check the connector (SC501/SC1101)

YES

Is Y/C signal sent to pins (Y4, V9) of IC3301 
(VIDEO_PROCESSOR)?

NO

Check the line between SC1101 and IC3301.

YES

Refer to “The picture doesn't appear in all modes.”

LC-46X8E/S/RU

4 – 14

                                            
The picture video signal (CVBS) input from EXT3 doesn’t come out in the display.

MINI AV UNIT:                      
Is the CVBS signal input from pin (6) of EXT3 terminal (J901) to 
pin (5) of connector (P901)?

NO

Check the line between J901 and P901.

TERMINAL UNIT:                 

YES

Is the CVBS signal input from pin (5) of connector (P501) to pin 
(3) of IC506 (VIDEO SELECTOR)? 

NO

Check the line between P501 and IC506.
(Connector P901/P501, etc.)

YES

Is the V3_PLUG signal (pin (7)) for connection detection of EXT3 
terminal (J901) normal?
 (When connecting terminal: 7V, When opening: 0V)

NO

Check J901, pin (2) of IC506 or peripheral circuits.

YES

Is video signal (MAIN_Y/V) output from pin (52) of IC506 to pin 
(2) of connector (SC501)? 

NO

Check the line between IC506 and SC501.

MAIN UNIT:                          

YES

Is video signal (MAIN_Y/V) input to pin (2) of connector SC1101?

NO

Check the connector (SC501/SC1101)

YES

Is video signal (MAIN_Y/V) input to pin (Y4) of IC3301 
(VIDEO_PROCESSOR)?

NO

Check the line between SC1101 and IC3301.

YES

Refer to “The picture doesn't appear in all modes.”

LC-46X8E/S/RU

4 – 15

                                            
The Y/C video signal input from EXT3 doesn’t come out in the display

MINI AV_UNIT:                    
Is Y/C signal output from pins (3, 4) of J902 (Y/C TERMINAL) to 
pins (13, 11) of connector (P901)?

NO

Check the line between J901 and P901.

TERMINAL UNIT:                 

YES

Is Y/C signal output from pins (13, 11) of connector (P501) to 
pins (5, 7) of IC506 (VIDEO SELECTOR)?

NO

Check the line between P501 and IC506.
(Connector P901/P501, etc.)

YES

Is the S3_PLUG signal (pin (6)) for connection detection of Y/C 
terminal (J902) normal?
(When connecting terminal: 7V, When opening: 0V)

NO

Check J902, pin (42) of IC506 or peripheral circuits.

YES

Is Y/C signal output from pins (52, 50) of IC506 to pins (2, 4) of 
connector (SC501)?

NO

Check the line between IC506 and SC501.

MAIN UNIT:                          

YES

Is Y/C signal input to pin (2, 4) of connector SC1101?

NO

Check the connector (SC501/SC1101)

YES

Is Y/C signal input to pin (Y4, V9) of IC3301 
(VIDEO_PROCESSOR)?

NO

Check the line between SC1101 and IC3301.

YES

Refer to “The picture doesn’t appear in all modes.”

LC-46X8E/S/RU

4 – 16

                                            
The HDMI signal input from EXT4 doesn’t come out in the display.

MINI AV_UNIT:                    
Is the HOT_PLUG detection signal input to pin (19) of the HDMI 
terminal (SC801) normal?
Is the HOT_PLUG output signal input from pin (18) of HDMI ter-
minal (SC801) to pin (51) of IC803?

NO

Check the between pin (25) of IC803 (HDMI_BUFFER) and pin 
(19) of SC801. (IC807, etc.)

YES

                                             
Check the connection and setup with the external HDMI devices.

Is EDID data accessed from pins (5, 6) of IC802 (EEPROM), and 
is it read from pin (15, 16) of a HDMI terminal (SC801)?

NO

Is access possible in the re-writing or exchange of EDID data of 
IC802?

YES

NO

Check SC801, IC802, IC803 and peripheral circuits.

Is TMDS signal (RXC

± - RX2±) input from EXT4 terminal 

(SC801) to the pins (28/27-35/34) of IC803 (HDMI)?

NO

Check the line between SC801 and IC803.

YES

Is TMDS signal (TXC

± - TX2±) input from the pins (9-1) of IC803 

(HDMI) to pins (12-2) of connector (SC802)?

NO

Check the line between IC803 and SC802.

YES

Is TMDS signal (TMDS6_D0-D2) input into pins (61-68) of 
IC1507 (HDMI_SW)?

NO

Check the line between connector (SC802) and IC1507.
(SC802, SC1503 and Wire harness (HM))

YES

Is switched TMDS signal (TMDS_D0

± - D2±) output from pins 

(11-1) of IC1507?

NO

Is the control signal of IC1507 and IC9101 (CPLD) normal?
(HDMI_SW_INT, HDMI_RST, etc.)

YES

Is switched TMDS signal (TMDS_D0

± - D2±) input to pins (L2-P1) of IC3301 (VIDEO_PROCESSOR)?

YES

NO

Refer to “The picture doesn't appear in all modes.”

Check the line between IC1507 and IC3301.