Sharp LC-70UD1U Service Manual page 46

LC-70UD1U
3. New method
LED flashing timing chart at the time of an error
1) POWER indicator
Error type
Inverter/Lamp failure H: On
Flashes fast once
L: Off
Power supply failure H: On
Flashes fast twice
L: Off
Main CPU Communica- H: On
tion failure
Flashes fast 3 times
L: Off
Other failure H: On
Flashes fast 4 times
L: Off
2) Inverter/Lamp failure details (POWER Green LED Flashes once, and DPC/SLEEP LED flashes)
Error type
Lamp failure H: On
Flashes fast once
L: Off
3) Power failure details (POWER Green LED Flashes twice, and DPC/SLEEP LED flashes)
Error type
PS_ON H: On
AC_DET failure
Flashes fast once
L: Off
D_POW H: On
Main 12V failure
Flashes fast twice
L: Off
D_POW H: On
Digital 3.3V failure
Flashes fast 3 times
L: Off
PANEL_POW H: On
Panel 12V failure
Flashes fast 5 times
L: Off
TCON_POW H: On
TCON Power failure
Flashes fast 5 times
L: Off
DRC_POW H: On
DRC Power failure
Flashes fast 6 times
L: Off
FRC_POW H: On
FRC Power failure
Flashes fast 7 times
L: Off
Center icon LED operation
Center icon LED operation
Center icon LED operation
6 – 2
Note
Pins are monitor microcomputer pins unless otherwise
specified.
Inverter/Lamp failure details is detected.
Power failure details is detected.
Communication failure details is detected.
Other failure details is detected.
Note
Pins are monitor microcomputer pins unless otherwise
specified.
ERR_PNL (19pin): Hi failure. Confirmed after 8 consecutive
detections at 64 msec intervals (detected only when the back-
light is on).
Note that after five detection counts, the lamp cannot be acti-
vated except in the monitor process.
Accumulated counts are cleared to 0 by the setting in the pro-
cess A.
Pins are monitor microcomputer pins unless otherwise
specified.
AC_DET (28pin) failure (L).
If error is detected during start-up or operation, the power is
turned on again by interrupt (instantaneous blackout process-
ing).
DET_12V (32pin) failure (L). Main 12V is not applied.
If error is detected during start-up or operation, the power is
turned on again by polling.
DET_D3V3 (33pin) failure (L). Digital 3.3V is not applied.
If error is detected during start-up or operation, the power is
turned on again by polling.
DET_PNL_12V (34pin) failure (L). Panel power is not applied.
Detection is started after turning on the panel power and
receiving command; the power is turned off by polling.
DET_POW_T (34pin) failure (L). TCON power is not applied.
Detection is started after turning on the panel power and
receiving command; the power is turned off by polling.
DET_POW_D (26pin) failure (L). DRC power is not applied.
Detection is started after turning on the panel power and
receiving command; the power is turned off by polling.
DET_POW_F (24pin) failure (L). FRC power is not applied.
Detection is started after turning on the panel power and
receiving command; the power is turned off by polling.
Note