Led Flashing Timing Chart At The Time Of An Error; Inverter/Lamp Failure Details; Power Failure Details; Communication Failure Details - Sharp LC-52LE640U Service Manual

LC-52/60/70LE640U,C6400U (1st Edition)

LED flashing timing chart at the time of an error

100ms 400ms
1) Inverter/Lamp failure details (Flashes slowly once and flashes fast)
Error type
Lamp failure H: On
Flashes fast once
L: Off
2) Power failure details (Flashes slowly twice and flashes fast)
Error type
PS_ON H: On
AC_DET failure
Flashes fast once
L: Off
SM_POW H: On
Main 13V 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
3) Communication failure details (Flashes slowly 3 times and flashes fast)
Error type
Initial communica- H: On
tion reception failure
Flashes fast once
L: Off
Start-up confirma- H: On
tion reception failure
Flashes fast twice
L: Off
Regular communica- H: On
tion failure
Flashes fast 3 times
L: Off
Other communica- H: On
tion failure
Flashes fast 5 times
L: Off
1.6sec
Center icon LED operation
Center icon LED operation
Center icon LED operation
6 – 3
Note
Pins are monitor microcomputer pins unless other-
wise specified.
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.
Note
Pins are monitor microcomputer pins unless other-
wise specified.
AC_DET (28pin) failure (L).
If error is detected during start-up or operation by inter-
rupt, the power is turned on again.
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.
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_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.
Note
Basically, debug print logs are analyzed or commu-
nication logs are analyzed by a bus monitor.
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 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 microcomputer
reception failure
Regular communication that is performed at 1 second
intervals in the normal operation is interrupted.
→ Main CPU operation failure or monitor microcom-
puter reception failure
When a request (PM_REQ=H) is sent from the main
microcomputer, the request command is not output
from the main CPU, etc.
→ Main CPU operation failure or monitor microcom-
puter reception failure