Power Failure Details; Communication Failure Details - Sharp LC-37D44U Service Manual

2)Power failure details (Power LED flashes twice and OPC LED flashes)
Error type
PS_ON
13V/UR10V failure
Flashes once
EU_POW
Main 3.3V failure
Flashes twice
D_POW
UR6V failure
Flashes 3 times
PANEL_POW
Panel 5V failure
Flashes 5 times
Main failure
Flashes 7 times
3)Communication failure details (Power LED flashes 3 times and OPC LED flash
Error type
Initial communication reception failure
Flashes once
Time-out setting reception failure
Start-up confirmation reception failure
Flashes twice
Regular communication failure
Flashes 3 times
OPC green LED operation (1 cycle)
H: On
L: Off
H: On
L: Off
H: On
L: Off
H: On
L: Off
H: On
L: Off
OPC green LED operation (1 cycle)
H: On
L: Off
H: On
L: Off
H: On
L: Off
6 – 15
Pins are monitor microprocessor pins unless otherwise
specified.
DET_POW1 (pin 34). Main converter 13V/UR10V is not
applied.
If error is detected during operation, the power is turned on
again by interrupt handling (instantaneous blackout process-
ing).
DET_POW3 (pin 36): Abnormal (L). Main power 3.3V is not
applied.
If error is detected during operation, error standby is activated
by polling.
DET_POW0 (pin 33): Abnormal (L). UR6V is not applied.
If error is detected during operation, error standby is activated
by polling.
DET_POW2 (pin 35): Abnormal (L). Panel power is not
applied.
If error is detected during operation, error standby is activated
by polling.
Main microprocessor detection error (FAN error, 1bitAMP
error, etc.)
The details are displayed in "ERROR STANDBY CAUSE" on
page 1 of process A mode for the main microprocessor.
Basically, communication logs are analyzed by a bus
monitor or debug print logs are analyzed.
Initial communication from the main CPU is not received.
(After canceling the reset, request for the monitor model No.
is not received.) → Communication line failure or main CPU
start-up failure
Time-out setting and start-up mode change cannot be
received from the main CPU. (Start-up communication until
time-out setting and start-up mode change is not received.) →
Main CPU start-up failure or monitor microprocessor's recep-
tion failure
Regular communication that is performed at 1 second inter-
vals in the normal operation is interrupted. → Main CPU oper-
ation failure or monitor microprocessor's reception failure
LC-37D44U