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AR-M256/M257/M258/M316/M317/M318/5625/5631  TROUBLE CODE LIST 9 - 10

H4

21

Content

Sub heater lamp abnormally low 
temperature detection

Details

The setup temperature (about –25°C: Sim 
43-1-1) is not reached within the specified 
time (about 32sec) from turning on the 
power. 

A/D value of fusing sub thermistor is not 
reached within the specified temperature 
(specified temperature : SIM43-1 (600dpi)
–25°C )

Cause

Sub thermistor defect.

Sub heater lamp failure.
Sub thermostat failure.

Control PWB failure.

Check 
and 
remedy

Check the sub heater lamp blinking with 
SIM 5-2-2.
When the lamp blinks normally:
Check the thermistor and the harness.

Check the MCU PWB thermistor input 
circuit.

If lamp lights and stays lit:
Check the power circuit and the lamp 
control circuit on MCU PWB.
Clear the display of self-diagnostics with 
SIM 14.

Check that there is no foreign material in 
the contact section between the thermistor 
and the heat roller. 

H5

01

Content

10 times of continuous detection of the 
lower paper exit sensor (POD1) lead edge 
jam or the upper paper exit sensor (POD2) 
lead edge jam or the duplex sensor 
(PPD2) rear edge jam

Details

After supplying the power, one of the 
above jams occurs 10 times continuously 
in printing

Counting is started on supplying the 
power. When any one of the above jams 
occurs, one count is made. When paper 
entry to the POD1 or POD2 is detected, 
the counter is cleared.

Cause

A paper jam (paper rounding, etc.) near 
the duplex sensor (PPD2) on the fusing 
unit is not canceled completely.
POD1, POD2, PPD2 sensor breakdown or 
harness connection trouble

Fusing unit installation failure

Check 
and 
remedy

Check for jam paper in the fusing section. 
(paper winding, etc.)
Check fusing unit installation.

Check the POD1, POD2 or PPD2 sensor.

Clear the trouble with SIM 14.

Trouble 

code

Details of trouble

Main 
code

Sub 

code

L1

00

Content

Scanner feed trouble

Details

Scanner feed is not completed within the 
specified time.

Cause

Mirror unit defect.

Scanner wire disconnection.
Origin detection sensor error.

Mirror motor harness abnormality.

Check 
and 
remedy

Check the scanning operation with SIM 1-
1.
When the mirror not feeds:
Check for disconnection of the scanner 
wire.
Check the harness and connector between 
the mirror motor and the MCU PWB.

Replace the mirror unit.

Replace the MCU PWB.
When the mirror feeds:
Check the mirror home position sensor 
with SiM 1-2.

L3

00

Content

Scanner return trouble

Details

Scanner return is not completed within the 
specified time.
When OC copying with the mirror at the 
home position, the mirror is not in the 
home position.

Cause

Mirror unit defect.

The scanner wire is disconnected.
Origin detection sensor error.

Mirror motor harness abnormality.

Check 
and 
remedy

Check the scanning operation with SIM 1-
1.
When the mirror fails to return:
Check for disconnection of the scanner 
wire.

Check the harness and connector between 
the mirror motor and the MCU PWB.

Replace the mirror unit.
Replace the MCU PWB.

When the mirror feeds:
Check the mirror home position sensor 
with SiM 1-2.

L4

01

Content

Main motor trouble

Details

The main motor does not rotate.

The motor lock signal is detected for 1sec 
or more after the main motor rotates.

The motor lock signal is detected for 1sec 
during rotation of the main motor.

Cause

Main motor defect.

Main motor connection, harness trouble or 
disconnection.

MCU PWB failure.

Check 
and 
remedy

Check the main motor operation with SIM 
25-1.

Check connection of the main motor 
harness and connector.

Replace the main motor.
Replace the MCU PWB.

Trouble 

code

Details of trouble

Main 
code

Sub 

code

AR-M256/M257/M258/M316/M317/M318/5625/5631  TROUBLE CODE LIST 9 - 11

L4

11

Content

Shifter motor trouble

Details

The shifter home position detection signal 
is not detected when the shifter is 
operating.

Cause

Shifter motor trouble or harnes connection 
trouble and disconnection.

Shifter home position sensor trouble.

Check 
and 
remedy

Check the shifter motor operation with SIM 
3-11.

Check connection of the shifter motor 
harness/connector.

Replace the shifter motor.

Replace the MCU PWB.

L6

10

Content

Polygon motor lock trouble

Details

The polygon motor does not rotate.

The motor lock signal is detected for 6sec 
or more after the polygon motor rotates.
The motor lock signal is detected for 1sec 
during rotation of the polygon motor.

Cause

Polygon motor unit failure

Polygon motor connection, harness trouble 
or disconnection
MCU PWB failure

Check 
and 
remedy

Check the polygon motor operation with 
SIM 61-1.

Check the connectors and the harness of 
polygon motor
Replace the polygon motor.

Replace the MCU PWB.

L8

10

Content

Power abnormality detection trouble

Details

The power status monitoring signal keeps 
power OFF state after passing the 
specified time (2sec).

Cause

Circuit around the power status monitoring 
signal (PSSTS) failure.

Check 
and 
remedy

Check whether power status monitoring 
signal (PSSTS) on MCU PWB is OPEN or 
not.
Replace MCU PWB.

U1

01

Content

FAX battery error

Details

The SRAM backup battery voltage on FAX 
control PWB falls.

Cause

The SRAM backup battery voltage on FAX 
control PWB falls.

Check 
and 
remedy

Check voltage of the SRAM back up 
battery.

Replace the battery.

02

Content

PANEL LOW battery error

Details

The voltage of the panel clock function 
battery falls.

Cause

The voltage of the panel clock function 
battery falls.

Check 
and 
remedy

Check voltage of panel clock function 
battery.

Replace the battery.

Trouble 

code

Details of trouble

Main 
code

Sub 

code

U2

04

Content

EEPROM communication error

Details

EEPROM communication error

Cause

EEPROM defect.

ICU PWB EEPROM access circuit failure.

Check 
and 
remedy

Check that the EEPROM is properly set.

Clear trouble with SIM 16.

Replace the MCU PWB.

20

Content

Machine speed code data error

Details

The machine boot speed information is not 
identical to the model code speed 
information

Cause

EEPROM defect.

SIM operation error.

Check 
and 
remedy

Check for matching of the machine and 
model information setting in SIM26-57.

40

Content

CRUM chip communication error

Details

Error in MCU-CRUM chip communication

Cause

CRUM chip failure.

Developing unit contact trouble.

MCU PWB failure.

Check 
and 
remedy

Replace the CRUM chip.

Check installation of the developing unit.

Clear the trouble with SIM 16.
Replace the MCU PWB.

Remarks

CRUM communication error

U7

00

Content

RIC communication trouble

Details

Error in communication with RIC.
Error in communication test after turning 
on the power or canceling SIM.

Cause

Connector harness contact trouble or 
disconnection.
RIC control PWB trouble.
MCU PWB failure.
Malfunction by noises.

Check 
and 
remedy

Check the communication cable, 
connectors from the RIC box to the main 
body.

U9

00

Content

Operation control PWB communication 
trouble

Details

Communication trouble between MCU and 
the operation control PWB

Cause

Operation control PWB connector 
disconnection
Harness failure of the operation control 
PWB and the MCU PWB

Check 
and 
remedy

Check the connectors and the harness of 
the operation control PWB and MCU PWB.

Check the grounding of the copier.
Check ROM on the operation control PWB.

80

Content

Operation control PWB communication 
trouble (Protocol)

Details

Communication trouble between MCU and 
the operation control PWB (Protocol error)

Cause

Operation control PWB connector 
disconnection.
Harness failure of the operation control. 
PWB and the MCU PWB.

Check 
and 
remedy

Check the connectors and the harness of 
the operation control PWB and MCU PWB.

Check the grounding of the copier.

Trouble 

code

Details of trouble

Main 
code

Sub 

code

AR-M256/M257/M258/M316/M317/M318/5625/5631  TROUBLE CODE LIST 9 - 12

U9

81

Content

Operation control PWB communication 
trouble (Parity)

Details

Communication trouble between MCU and 
the operation control PWB (Parity error)

Cause

Operation control PWB connector 
disconnection.

Harness failure of the operation control 
PWB and the MCU PWB.

Check 
and 
remedy

Check the connectors and the harness of 
the operation control PWB and MCU PWB.

Check the grounding of the copier.

82

Content

Operation control PWB communication 
trouble (Overrun)

Details

Communication trouble between MCU and 
the operation control PWB (Overrun error)

Cause

Operation control PWB connector 
disconnection.

Harness failure of the operation control 
PWB and the MCU PWB.

Check 
and 
remedy

Check the connectors and the harness of 
the operation control PWB and MCU PWB.
Check the grounding of the copier.

84

Content

Operation control PWB communication 
trouble (Framing)

Details

Communication trouble between MCU and 
the operation control PWB (Framing error)

Cause

Operation control PWB connector 
disconnection.

Harness failure of the operation control 
PWB and the MCU PWB.

Check 
and 
remedy

Check the connectors and the harness of 
the operation control PWB and MCU PWB.
Check the grounding of the copier.

88

Content

Operation control PWB communication 
trouble (Time-out)

Details

Communication trouble between MCU and 
the operation PWB (Time-out error)

Cause

Operation control PWB connector 
disconnection.

Harness failure of the operation control 
PWB and the MCU PWB.

Check 
and 
remedy

Check the connectors and the harness of 
the operation control PWB and MCU PWB.
Check the grounding of the copier.

99

Content

Operation panel destination error

Details

An error occurred in checking the 
destination of the operation panel and the 
main body.

Cause

Erroneous connection the operation panel 
unit.

SIM setup error.

Check 
and 
remedy

Check the destination information of the 
operation panel unit and the MCU. (Use 
SIM 26-6 for the destination of the body.)

Trouble 

code

Details of trouble

Main 
code

Sub 

code

EE

EL

Content

Developer adjustment trouble (Over-toned 
abnormality)

Details

An abnormality occurred in execution of 
automatic developer adjustment.

Sample data was detected over-toner.

Cause

Toner concentration sensor abnormality.
Toner concentration trouble.

Developing unit trouble.

MCU PWB failure.

Check 
and 
remedy

Use SIM 25-2 to perform the auto 
developer adjustment.

EU

Content

Developer adjustment trouble (Under-
toned abnormality)

Details

An abnormality occurred in execution of 
automatic developer adjustment.

Sample data was detected under-toner.

Cause

Toner concentration sensor abnormality.

Toner concentration trouble.

Developing unit trouble.
MCU PWB failure.

Check 
and 
remedy

Use SIM 25-2 to perform the auto 
developer adjustment.

PF

00

Content

PF trouble

Details

The copy inhibit command from RIC is 
received.

Cause

Judged by the host.

Check 
and 
remedy

Inform to the host.

Trouble 

code

Details of trouble

Main 
code

Sub 

code

AR-M256/M257/M258/M316/M317/M318/5625/5631  TROUBLE CODE LIST 9 - 13