LC-46X8E (serv.man8). Troubleshooting Table - Sharp TV Parts Guide (repair manual). Page 22

LC-46X8E/S/RU

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SCART2:                             
No picture from EXT3 appears on EXT2- connected monitor.

                                            
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) 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.

3) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
4) 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 from pin (51) of IC506 to pin (19) of 
SCART2 (SC503)?

YES

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

NO

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

YES

Check the IC506 and its peripheral circuits.

MINI AV UNIT:                       

NO

Is CVBS signal input from pin (6) of the EXT3 terminal (J901) to 
pin (5) of the connector (P501)?

YES

Check the connector (P501/P901)

NO

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

YES

Check the setting of an external input device that connects of 
J901.

NO

Check between V3_PLUG_LINE J901 and pin (2) of IC506 in the 
TERMINAL UNIT. (Connector P901/P501, etc.)

1) Power red LED

Remarks

Lamp failure
Flashes once: Fast

H: On

L: Off

ERR_PNL (IC2002_43pin): Abnormal L. Confirmed after 5 
consecutive detections at 1 second intervals (detected only 
when the backlight is on).
Note that after five detection counts, the lamp cannot be acti-
vated except in the monitoring process. (For the first time, 
only the inverter is reset, and error OFF is not activated)
Accumulated counts are cleared to 0 when the correspond-
ing setting in the process A is made, when the power is 
turned on with [CH_DOWN] and [VOL_UP] on the unit down 
or after continuous illumination for 3 minutes.

Power failure
Flashes twice

H: On

L: Off

Refer to “Power failure details”.

Communication failure 
with main CPU
Flashes 3 times

H: On

L: Off

Refer to “Communication failure details”.
Communication line failure or main CPU (IC8101) communi-
cation 
failure. 

→ Check main CPU (IC8101).

Monitor temp. failure
Flashes 5 times

H: On

L: Off

If the panel temperature is 60

°C or more for 15 seconds or 

more in a row, CAUTION appears on the OSD of AVC 
(flashes in red in the lower right screen).
If the panel temperature is 60

°C or more for 28 seconds or 

more in a row, error standby is activated.
(MONITOR MAX TEMP of process adjustment (28/31): 
Change of temperature failure AD value): Thermistor

250ms

1sec