Sharp LC-52D82U Service Manual page 68

LC-46D82U/LC-52D82U
LED flashing timing chart for error notification.
1) Power LED (The power LED (Green) which lights during TV reception flashes.)
Error type
Lamp failure
Flashes once: Fast
Power failure
Flashes twice
Communication failure with main CPU
Flashes 3 times
Vsync
Trident failure
Flashes 4 times
Monitor temperature failure
Flashes 5 times
Program data broken
Flashes 8 times
2) Power failure details (Power LED flashes twice and OPC LED flashes)
Error type
PS_ON
DET_10V failure
Flashes once
D_POW
DET_3V3 failure
Flashes twice
D_POW
DET_6V failure
Flashes 3 times
250ms 1sec
Power red LED operation (1 cycle)
H: On
L: Off
H: On
L: Off
H: On
L: Off
H: On
L: Off
H: On
L: Off
H: On
L: Off
Notification LED operation (1 cycle)
H: On
L: Off
H: On
L: Off
H: On
L: Off
4 – 20
Pins are microprocessor pins.
ERR_PNL (pin 43): L failure. Confirmed after 10 consecutive
matches at 500 ms intervals (detected only when the back-
light is on).
Note that after five match 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 or 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.
VSYNC (pin 46) failure (uninput). Trident_IC operation failure.
Detected during operation (interruption).
Detected during operation (interruption).
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 page 23 of process A: Change of
temperature failure AD value): Thermistor
Internal Flash ROM data is not correct.
[Restore] Write Monitor Micon software.
Pins are microprocessor pins unless otherwise specified.
DET_10V (pin 57). UR10V or A9V is not applied.
If error is detected during operation, the power is turned on
again by interrupt handling (instantaneous blackout process-
ing).
DET_D3V3 (pin 59) failure (L). D3.3V is not applied.
If error is detected during operation, error standby is activated
by polling.
DET_6V (pin 56) failure (L). D5V or A5V is not applied.
If error is detected during operation, error standby is activated
by polling.