Sharp AQUOS LC-42D64U, Service Manual

Page: 62 / 172

LC-42/46/52D64U
6 – 20
1) Power LED (The power LED (Green) which lights during TV reception flashes.)
2) Power failure details (Power LED flashes twice and OPC LED flashes)
LED flashing timing chart for error notification.
Error type Power red LED operation (1 cycle) Pins are microprocessor pins.
Lamp failure
Flashes once: Fast 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.
Power failure
Flashes twice Refer to “Power failure details”.
Communication failure with main CPU
Flashes 3 times Refer to “Communication failure details”.
Communication line failure or main CPU communication fail-
ure.
→
Check debug statements for the main CPU.
Vsync
Failure
Flashes 4 times VSYNC (pin 52) failure (uninput). Operation failure.
Detected during operation (interruption).
Detected during operation (interruption).
Monitor temperature failure
Flashes 5 times 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 24 of process A: Change of
temperature failure AD value): Thermistor
Error type Notification LED operation (1 cycle) Pins are microprocessor pins unless otherwise specified.
PS_ON
DET_10V failure
Flashes once 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 failure
Flashes twice
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 failure
Flashes 3 times
DET_6V (pin 56) failure (L). D5V or A5V is not applied.
If error is detected during operation, error standby is activated
by polling.
PNL_12V failure
Flashes 5 times
DET_PNL_12V (pin 58) failure (L). Panel power is not
applied.
If error is detected during operation, error standby is activated
by polling.
Main failure
Flashes 7 times Main microprocessor detection error.
The details are displayed in “ERROR STANDBY CAUSE” on
page 1 of process A for the main microprocessor.
250ms 1sec
H: On
L: Off
H: On
L: Off
H: On
L: Off
H: On
L: Off
H: On
L: Off
H: On
L: Off
H: On
L: Off
H: On
L: Off
H: On
L: Off
H: On
L: Off