Sharp LC-52D62U Service Manual page 52

LC-46D62U/LC-52D62U
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
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
PANEL_POW
PNL_12V failure
Flashes 5 times
Main failure
Flashes 7 times
3) Communication failure details (Power LED flashes 3 times and OPC LED flashe
Error type
Initial communication
reception failure
Flashes once
Power red LED operation (1 cycle)
Notification LED operation (1 cycle)
Notification LED operation (1 cycle)
6 – 17
Pins are microprocessor pins.
L_FL_ERR (pin 73): 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 48) 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
Pins are microprocessor pins unless otherwise specified.
DET_10V (pin 63). 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_3V3 (pin 64) failure (L). D3.3V is not applied.
If error is detected during operation, error standby is activated
by polling.
DET_6V (pin 27) failure (L). D5V or A5V is not applied.
If error is detected during operation, error standby is activated
by polling.
DET_PNL_12V (pin 67) failure (L). Panel power is not
applied.
If error is detected during operation, error standby is activated
by polling.
Main microprocessor detection error (FAN error, 1bitAMP
error, etc.)
The details are displayed in "ERROR STANDBY CAUSE" on
page 1 of process A for the main microprocessor.
Basically, communication logs are analyzed by a bus
monitor or debug print logs are analyzed.
Initial communication from the main CPU is not received.
(After cancelling the reset, request for the monitor model No.
is not received.)
Communication line failure or main CPU start-up failure.