Green Power Led - Sharp LC-37D44U Service Manual

LC-37D44U
LED flashing timing chart for error notification.

1)Green power LED

Error type
Lamp failure
Flashes once: Fast
Power failure
Flashes twice
communication failure
with main CPU
Flashes 3 times
Monitor temperature failure
Flashes 5 times
Illegal Flash ROM Data
Flashes 8 times
250ms 1sec
Power green LED operation (1 cycle)
H: On
L: Off
H: On
L: Off
H: On
L: Off
H: On
L: Off
H: On
L: Off
6 – 14
Pins are monitor microprocessor pins.
ERR_PNL (pin 40): Abnormal L. Confirmed after 5 consecu-
tive 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 corresponding
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.
Refer to "Power failure details".
Refer to "Communication failure details".
Communication line failure or main CPU communication fail-
ure → Check debug statements for the main CPU.
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 25 seconds or
more in a row, error standby is activated.
(MONITOR MAX TEMP on process A mode: Change of tem-
perature failure AD value): Thermistor
Flash ROM of Monitor Microprocessor is illegal.
Update Monitor Microprocessor Software again.