: Feb. 9 2004
1
AR-M550/M620/M700 SELF DIAG MESSAGE AND TROUBLESHOOTING 9 - 24
F2 37 Case 2 Trouble
position/
Cause
Improper connection of
the harness between the
PCU PWB and the drum
marking sensor
Remedy If “Error” is displayed, it
may be considered as a
breakdown. Check the
sensor and the harness.
Note
Case 3 Trouble
position/
Cause
The drum marking sensor
is dirty.
OPC drum cleaning
trouble
Remedy If the adjustment is
completed, check the
drum surface conditions.
Note
Main
code
Sub
code
Title
Process thermistor breakdown
F2 39 Phenomenon Display Lamp
Message
Details Process thermistor
breakdown
When the process
thermistor detection,
3.03V or above, or 0.28V
or below is detected
once.
Section Engine
Operation
mode
Note
Case 1 Trouble
position/
Cause
Improper connection of
the process thermistor
harness.
Remedy Check connection of the
connector and the
harness of the process
thermistor.
Note
Case 2 Trouble
position/
Cause
Process thermistor
trouble
Remedy Replace the process
thermistor.
Note
Case 3 Trouble
position/
Cause
PCU PWB trouble
Remedy Check the PCU PWB.
Note
Main
code
Sub
code
Title
Drum marking sensor gain
adjustment error
Main
code
Sub
code
Title
Developing thermistor breakdown
F2 46 Phenomenon Display Lamp
Message
Details Developing thermistor
open or short.
Three successive values
of 244 or above, or values
of 20 or below, are
detected at the
developing thermistor.
Section Engine
Operation
mode
Note
Case 1 Trouble
position/
Cause
Developing thermistor
harness connection
trouble
Remedy Check connection of the
connector and the
harness of the developing
thermistor.
Note
Case 2 Trouble
position/
Cause
Developing thermistor
trouble
Remedy Check the developing
thermistor
Note
Case 3 Trouble
position/
Cause
PCU PWB trouble
Remedy Check the PCU PWB.
Note
Main
code
Sub
code
Title
Developing humidity sensor break
down
F2 48 Phenomenon Display Lamp
Message
Details
Developing humidity
sensor open or short.
A value of greater than or
equal to 255 or above, or
value of 7 or below, is
detected at the developing
humidity sensor.
Section Engine
Operation
mode
Note
Case 1 Trouble
position/
Cause
Developing humidity
sensor harness
connection trouble
Remedy Check connection of the
connector and the
harness of the developing
humidity sensor.
Note
Case 2 Trouble
position/
Cause
Developing humidity
sensor trouble
Remedy Check the developing
humidity sensor
Note
Case 3 Trouble
position/
Cause
PCU PWB trouble
Remedy Check the PCU PWB.
Note
1
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