Led Flashing Timing Chart For Error Notification; Power Led - Sharp LC-46SB57U Service Manual

LED flashing timing chart for error notification.

1) Power LED (Large classification)
Error type
Lamp error H: On
Flashes once: Fast
L: Off
Power error H: On
Flashes twice
L: Off
Communication error H: On
with the main CPU
Flashes 3 times
L: Off
Monitor temperature H: On
error
Flashes 5 times
L: Off
BD unit error H: On
Flashes 6 times
L: Off
Program area data H: On
destruction
Flashes 8 times
L: Off
250ms
Power green LED operation (1 cycle)
1sec
Pins are monitor microprocessor (IC2002) pins.
ERR_PNL (40pin): L error. Confirmed after 10 consecutive detec-
tions at 500 ms intervals (detected only when the backlight is on).
Note that after five detection counts, the lamp cannot be activated
except in the monitoring process. (For the first time, only the
inverter is reset, and error OFF is not activated.)
[Clearing method of the accumulated counts] •Set "LAMP
ERROR" on page 1 of the process A to 0. •AC_ON is performed
with [CH_DOWN] and [VOL_UP] on the unit down. •Continuous
illumination for 3 minutes.
Refer to "Power error details".
Refer to "Communication error details".
Communication line error or main CPU communication error →
Check debug statements for the main CPU.
Communication line with the main CPU: TxD(75pin), RxD(76pin)
If the panel temperature is 60°C or more for 15 seconds or more in
a row, CAUTION appears on the OSD ("TEMPERATURE" flashes
in red in the lower right portion of the screen).
If the panel temperature is 60°C or more for 25 seconds or more in
a row, error standby is activated.
[Avoidance method] Reduce the value of MONITOR MAX TEMP
(temperature protection threshold) on page 28 of the process A.
BD unit error
For the error details, refer to "standby cause" in the process menu.
Flash ROM data error in the microprocessor
[Recovery method] Write the microprocessor software.
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LC-46SB57U/LC-52SB57U