Sharp LC-70UD1U, Service Manual

Page: 46 / 84

LC-70UD1U
6 – 2
3. New method
LED flashing timing chart at the time of an error
1) POWER indicator Note
2) Inverter/Lamp failure details (POWER Green LED Flashes once, and DPC/SLEEP LED flashes) Note
3) Power failure details (POWER Green LED Flashes twice, and DPC/SLEEP LED flashes) Note
Error type Center icon LED operation
Pins are monitor microcomputer pins unless otherwise
specified.
Inverter/Lamp failure
Flashes fast once H: On
L: Off
Inverter/Lamp failure details is detected.
Power supply failure
Flashes fast twice H: On
L: Off
Power failure details is detected.
Main CPU Communica-
tion failure
Flashes fast 3 times H: On
L: Off
Communication failure details is detected.
Other failure
Flashes fast 4 times H: On
L: Off
Other failure details is detected.
Error type Center icon LED operation
Pins are monitor microcomputer pins unless otherwise
specified.
Lamp failure
Flashes fast once H: On
L: Off
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.
Error type Center icon LED operation
Pins are monitor microcomputer pins unless otherwise
specified.
PS_ON
AC_DET failure
Flashes fast once H: On
L: Off
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).
D_POW
Main 12V failure
Flashes fast twice H: On
L: Off
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.
D_POW
Digital 3.3V failure
Flashes fast 3 times H: On
L: Off
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.
PANEL_POW
Panel 12V failure
Flashes fast 5 times H: On
L: Off
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.
TCON_POW
TCON Power failure
Flashes fast 5 times H: On
L: Off
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.
DRC_POW
DRC Power failure
Flashes fast 6 times H: On
L: Off
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.
FRC_POW
FRC Power failure
Flashes fast 7 times H: On
L: Off
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.