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LC-46X8E/S/RU

4 – 17

                                             
The HDMI signal input from EXT5/6 doesn’t come out in the display.

MAIN UNIT:                          
EXT5
Is the HOT_PLUG detection signal input to pin (19) of the HDMI 
terminal (SC1501) normal? 

NO

EXT5
Check between pin (19) of SC1501 and pin (16) of IC1507 
(HDMI_SW). (IC1506, etc.)

EXT6
Is the HOT_PLUG detection signal input to pin (19) of the HDMI 
terminal (SC1502) normal? 

NO

EXT6
Check between pin (19) of SC1502 and pin (36) of IC1507 
(HDMI_SW). (IC1506, etc.)

YES

                                             

YES

Check the connection and setup with the external HDMI devices.

EXT5
Is EDID data (SDA/SCL) of IC1501 (EEPROM) accessed, and is 
it read from pins (15, 16) of a HDMI terminal (SC1501)?

NO

Check short-circuit or open circuit of the I

2

C line.

EXT6
Is EDID data (SDA/SCL) of IC1502 (EEPROM) accessed, and is 
it read from pins (15, 16) of a HDMI terminal (SC1501)?

NO

Check short-circuit or open circuit of the I

2

C line.

YES

EXT5
Is TMDS signal (RXC

± - RX2±) input from SC1501 to the pins 

(19/18-28/27) of IC1507?

NO

Check the line between SC1501 and IC1507.

EXT6
Is TMDS signal (RXC

± - RX2±) input from SC1502 to the pins 

(39/38-48/47) of IC1507?

NO

Check the line between SC1502 and IC1507.

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.

LC-46X8E/S/RU

4 – 18

                                             
The PC (ANALOG) video signal input from EXT7 (D-SUB-15pin-terminal) doesn’t come out in the display.

MAIN_UNIT:                         
Are the video signal (R, G, B) and the synchronized signal (H/V) 
input from pins (1, 2, 3) and pins (13, 14) of EXT7 terminal 
(SC1504)?

YES

Check the connection and setup between SC1504 and its cir-
cumference circuit as well as the external HDMI devices. 
(IC1503, etc.)

NO

Are the video signal (R, G, B) and the synchronized signal (H/V) 
input from pins (U8, Y7, W10) and pins (V10, U10) of IC3301 
(VIDEO PROCESSOR)?

YES

Check the line between SC1504 and IC3301.

NO

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

                                            
The component video signal input to EXT8 doesn’t come out in the display.

TERMINAL UNIT:                 
Is COMPONENT video signal (Y, Pb, Pr) input to pins (6, 5, 4) of 
EXT8 terminal (J508)?

NO

Check the connection of J508 and the external input device.

YES

Is COMPONENT video signal (Y, Pb, Pr) input to pins (33, 35, 
37) of IC506 (VIDEO SELECTOR)?

NO

Check the line between J508 and IC506.

YES

Is detection signal (COMP1_PLUG) of the COMPONENT video 
signal from pin (7) of EXT8 terminal (J508) normal?
(When connecting terminal: 7V, When opening: 0V)

NO

Check from EXT8 terminal (J508) to pin (38) of IC506. 

YES

Is COMPONENT video signal (Y, Pb, Pr) output from pins (60, 
59, 58) of IC506 to pins (6, 8, 10) of the connector (SC501)?

NO

Check the line between IC506 and SC501.
(Q516, Q518, Q520, etc.)

MAIN UNIT:                          

YES

Is COMPONENT video signal output from pins (6, 8, 10) of the 
connector (SC1101)?

NO

Check the connector (SC501/SC1101)

YES

Is COMPONENT video signal input to pins (W6, Y9, W8) 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 – 19

                                            
No picture appears on EXT1 - connected monitor during the tuner (U/V) reception.

                                            
Checklist:
1) 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”.

2) Is ANT-CABLE disconnected or connected improperly? 

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

3) 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.

4) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
5) 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)

TERMINAL UNIT:                 
Is CVBS signal output into pin (19) of SC502 (SCART1) from pin 
(2) of IC1501 (SW)?

YES

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

NO

Is TUNRE_CVBS signal input into pin (6) of IC503 (SW)?

YES

Check the IC501 (SW), IC503 (SW) and their peripheral circuits.

NO

Is TUNRE_CVBS signal output from pin (17) of IC7504 (IF-
DEMO)?

YES

Check the line between IC7504 and IC503.
(Q7505, IC7508, etc.)

NO

Is IF signal output from pin (17) of TUNRE (TU7501)?

YES

Check the IC7504/FL7502 (VIF_SAW) and its peripheral circuits.

NO

Check whether I2C is normally accessed between TU7501 and 
IC7507 (COFDM).

LC-46X8E/S/RU

4 – 20

                                            
No picture appears on EXT1 - connected monitor during the tuner (DTV) reception.

                                            
Checklist:
1) 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”.

2) Is ANT-CABLE disconnected or connected improperly? 

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

3) 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.

4) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
5) 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)

TERMINAL UNIT:                 
Is CVBS signal outputted from pin (2) of IC1501 (SW) to pin (19) 
of SC502 (SCART1)?

YES

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

NO

Is DTV_CVBS signal sent to pin (4) of IC503 (SW)?

YES

Check the IC501 (SW), IC503 (SW) and their peripheral circuits.

MAIN UNIT:                          

NO

Is DTV_CVBS signal output to pin (18) of connector (SC1101)?

YES

Check the line between SC1101 (MAIN_UNIT)/ SC501 (TERMI-
NAL UNIT) and IC503.

NO

Is DTM_CVBS signal output from pin (AD4) of IC8101?

YES

Check the line between IC8101 and SC1101.

NO

Is digital signal (DTV_SD0, DTV_SCK, DTV_WS) input to the 
pins (U3, U2, U1) of IC8101?

YES

Check IC8101 or peripheral circuits.

NO

Is digital signal (DTV_SD0, DTV_SCK, DTV_WS) output from 
pins (32, 11, 10) of IC1404 (CODEC)?

YES

Check connector (SC502) or connector (P7501).

NO

Check IC1404, IC7507 or TU7501.
(+B line, I

2

C line or peripheral circuit)