Sharp Aquos LC-60LE845U, Service Manual, Page: 48 / 86

LC-60/70LE745U,C7450U,LE845U,C8470U,LE847U (1st Edition)
6 – 3
LED flashing timing chart at the time of an error
1) Inverter/Lamp failure details (Flashes slowly once and flashes fast) Note
2) Power failure details (Flashes slowly twice and flashes fast) Note
3) Communication failure details (Flashes slowly 3 times and flashes fast) Note
Error type Center icon LED operation
Pins are monitor microprocessor pins unless other-
wise specified.
Lamp failure
Flashes fast once H: On
L: Off
ERR_PNL (19pin): Hi failure. Confirmed after 8 consecu-
tive detections at 64msec intervals (detected only when
the backlight is on).
Note that after five detection counts, the lamp cannot be
activated except in the monitor process.
Accumulated counts are cleared to 0 by the setting in the
process A.
Error type Center icon LED operation
Pins are monitor microprocessor pins unless other-
wise 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 by inter-
rupt, the power is turned on again.
SM_POW
Main 13V failure
Flashes fast twice H: On
L: Off
DET_13V (32pin) failure (L). Main 13V 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_PNL12V (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.
Error type Center icon LED operation
Basically, debug print logs are analyzed or commu-
nication logs are analyzed by a bus monitor.
Initial communica-
tion reception failure
Flashes fast once H: On
L: Off
Initial communication from the main CPU is not
received. (Request for the monitor model No. is not
received.)
→
Communication line failure or main CPU start-up fail-
ure
Start-up confirma-
tion reception failure
Flashes fast twice H: On
L: Off
Start-up reason confirmation from the main CPU cannot
be received. (Start-up communication until start-up rea-
son notification command is not received.)
→
Main CPU start-up failure or monitor microprocessor
reception failure
Regular communica-
tion failure
Flashes fast 3 times H: On
L: Off
Regular communication that is performed at 1 second
intervals in the normal operation is interrupted.
→
Main CPU operation failure or monitor microproces-
sor reception failure
Other communica-
tion failure
Flashes fast 5 times H: On
L: Off
When a request (PM_REQ=H) is sent from the main
microprocessor, the request command is not output
from the main CPU, etc.
→
Main CPU operation failure or monitor microproces-
sor reception failure
100ms 400ms 1.6sec