: Feb. 9 2004
1
AR-M550/M620/M700 SELF DIAG MESSAGE AND TROUBLESHOOTING 9 - 32
Main
code
Sub
code
Title
Controller fan motor lock detection
L4 30 Phenomenon Display Lamp
Message
Details
Controller fan motor lock
detection
The motor lock signal is
detected during rotation of
the controller fan motor.
The motor lock signal is
detected during rotation of
the HDD fan motor.
Section Controller
Operation
mode
Note
Case 1 Trouble
position/
Cause
Fan motor trouble
Remedy Use SIM 6-2 to check the
fan motor operation.
Note
Case 2 Trouble
position/
Cause
Improper connection of
the harness between the
controller PWB and the
fan motor.
Control circuit trouble
Remedy Check the harness and
the connector between
the controller PWB and
the fan motor.
Note
Main
code
Sub
code
Title
Paper discharging fan trouble
L4 31 Phenomenon Display Lamp
Message
Details
Paper exit thermistor
open or short.
When the temperature of
100°C or above (entered
value 235) is detected in
the paper exit thermistor
3 times or more
continuously.
Section Engine
Operation
mode
Note
Case 1 Trouble
position/
Cause
Defective contact of
paper exit thermistor
harness
Remedy
Check connection of the
paper exit thermistor
harness and the connector.
Note
Case 2 Trouble
position/
Cause
Fan motor trouble
Remedy Use SIM 6-2 to check the
fan motor operation.
Note
Case 3 Trouble
position/
Cause
PCU PWB, harness
connection between fan
and motor trouble
PCU circuit trouble
Thermistor (TH_EX)
trouble
Remedy Check the PCU PWB, the
harness between fan and
motor, and the connector.
Note
1
1
Main
code
Sub
code
Title Polygon motor lock detection
L6 10 Phenomenon Display Lamp
Message
Details Polygon motor lock
detection
It is judged that the
polygon motor lock signal
of the LSU is not
outputted.
The polygon motor lock
signal is checked in an
interval of 10sec after
starting the polygon
motor, and it is found that
the polygon motor is not
rotating normally.
Section Engine
Operation
mode
Note
Case 1 Trouble
position/
Cause
Polygon motor trouble
Remedy Use SIM 61-1 to check
the polygon motor
operation.
Note
Case 2 Trouble
position/
Cause
Disconnection or
breakage of the LSU
connector or the harness
in the LSU
Remedy Check connection of the
harness and the
connector.
Replace the LSU.
Note
Main
code
Sub
code
Title
No full wave signal
L8 01 Phenomenon Display Lamp
Message
Details The full wave signal is not
detected.
Section Engine
Operation
mode
Note
Case 1 Trouble
position/
Cause
Disconnection or
breakage of the PCU
PWB connector or the
harness in the power unit
Remedy Check connection of the
harness and the
connector.
Note
Case 2 Trouble
position/
Cause
PCU PWB trouble
Remedy Replace the PCU PWB.
Note
Case 3 Trouble
position/
Cause
12V power source trouble
Remedy Replace the power unit.
Replace the controller
connection mother board.
Note
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