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MX-4101N  SELF DIAG AND TROUBLE CODE  7 – 21

 

 

 

 

 

 

 

 

Trouble content

When separating the primary transfer belt unit, 
change in the separation position sensor 
characteristics is not detected within the specified 
time.

Detail

PCU

Cause

Transfer unit position sensor trouble.
PCU PWB trouble.
Connection trouble of the connector and the 
harness.
Transfer unit separation clutch operation trouble.
Primary transfer belt unit is not installed.

Check & Remedy

Use SIM6-3 to check the separating operation of the 
transfer unit.
Install the primary transfer belt unit.
Replace the transfer unit position sensor.
Replace the PCU PWB.
Check connection of the connector and the harness.
Replace the transfer unit separation clutch.

Trouble content

Detail

PCU

Cause

No change in the shifter home position sensor signal 
is detected in the operation of the shifter initializing.
Shift motor trouble.
PCU PWB trouble.
Connection trouble of the connector and the 
harness.
Shifter home position sensor trouble.

Check & Remedy

Use SIM6-1 to check the shift operation.
Use SIM30-1 to check the operation of the shifter 
home position sensor.
Replace the shift motor.
Replace the PCU PWB.
Check connection of the connector and the harness.
Replace the shifter home position sensor.

Trouble content

Detail

PCU

Cause

No change in the fusing pressure release sensor 
signal is detected within the specified time after 
turning ON the fusing pressure release motor.
Fusing pressure release sensor trouble.
Fusing pressure release motor trouble.
Fusing pressure release level F, R trouble.
PCU PWB trouble.
Connection trouble of the connector and the 
harness.

Check & Remedy

Replace the fusing pressure release sensor.
Replace the fusing pressure release motor.
Replace the fusing pressure release lever F, R.
Replace the PCU PWB.
Check connection of the connector and the harness.

Trouble content

Detail

MFP

Cause

Fan motor trouble.
MFP PWB trouble.Harness and connector 
connection trouble.
PCU PWB trouble

Check & Remedy

Use SIM6-2 to check the operation of the fan motor.
Replace the fan motor.
Replace the MFP PWB.
Check connection of the connector and the harness.
Replace the PCU PWB.

Trouble content

Detail

PCU

Cause

The fan operation signal is not detected within the 
specified time in the paper exit cooling fan operation.
Paper exit cooling fan trouble.
PCU PWB trouble
Connection trouble of the connector and the 
harness.

Check & Remedy

Check connection of the connectors and the 
harness.
Use SIM6-2 to check the rotating operation of the 
fan.
Replace the paper exit cooling fan.
Replace the PCU PWB.

Trouble content

Detail

PCU

Cause

The fan operation signal is not detected within the 
specified time in the power cooling fan operation.
Power cooling fan trouble.
PCU PWB trouble.
Connection trouble of the connector and the 
harness.

Check & Remedy

Use SIM6-2 to check the rotating operation of the 
fan.
Replace the power cooling fan.
Replace the PCU PWB.
Check/replace the connector or the harness.

Trouble content

Detail

PCU

Cause

When the LSU cooling fan is operated, the fan 
operation signal is not detected within the specified 
time.
LSU cooling fan trouble.
PCU PWB trouble.
Connection trouble of the connector and the 
harness.

Check & Remedy

Use SIM6-2 to check that the fan is actually rotating.
Replace the LSU cooling fan.
Replace the PCU PWB.
Replace the LSUcnt PWB.
Check connection of the connector and the harness.

Trouble content

Detail

PCU

Cause

The fan operation signal is not detected within the 
specified time in the fusing cooling fan operation.
Fusing cooling fan trouble.
PCU PWB trouble
Connection trouble of the connector and the 
harness.

Check & Remedy

Use SIM6-2 to check the rotating operation of the 
fan.
Replace the fusing cooling fan.
Replace the PCU PWB.
Check connection of the connector and the harness.

MX-4101N  SELF DIAG AND TROUBLE CODE  7 – 22

 

 

 

 

 

 

 

 

Trouble content

Detail

PCU

Cause

When the toner cooling fan is operated, the fan 
operation signal is not detected within the specified 
time.
Toner cooling fan trouble.
PCU PWB trouble.
Connection trouble of the connector and the 
harness.

Check & Remedy

After turning ON the power, check to confirm that the 
fan is rotating.
Replace the toner cooling fan.
Replace the PCU PWB.
Check connection of the connector and the harness.

Trouble content

Detail

PCU

Cause

The fan operation signal is not detected within the 
specified time in the process fan operation.
Process fan trouble.
PCU PWB trouble
Connection trouble of the connector and the 
harness.

Check & Remedy

Check that the fan is rotating after turning ON the 
power.
Replace the process fan.
Replace the PCU PWB.
Check connection of the connector and the harness.

Trouble content

Detail

PCU

Cause

The fan operation signal is not detected within the 
specified time in the rear cooling fan operation.
Rear cooling fan trouble.
PCU PWB trouble.
Connection trouble of the connector and the 
harness.

Check & Remedy

Check that the fan is rotating after turning ON the 
power.
Replace the rear cooling fan.
Replace the PCU PWB.
Check connection of the connector and the harness.

Trouble content

Detail

PCU

Cause

When the toner cooling fan is operated, the fan 
operation signal is not detected within the specified 
time.
Toner cooling fan trouble.
PCU PWB trouble.
Connection trouble of the connector and the 
harness.

Check & Remedy

After turning ON the power, check to confirm that the 
fan is rotating.
Replace the toner cooling fan.
Replace the PCU PWB.
Check connection of the connector and the harness.

Trouble content

Detail

PCU

Cause

The fan operation signal is not detected within the 
specified time in the ozone exhaust fan operation.
Ozone exhaust fan trouble.
PCU PWB trouble.
Connection trouble of the connector and the 
harness.

Check & Remedy

Check that the fan is rotating after turning ON the 
power.
Replace the ozone exhaust fan.
Replace the PCU PWB.
Check connection of the connector and the harness.

Trouble content

Detail

PCU

Cause

The motor does not reach the specified rpm in 7 sec 
after starting rotation of the polygon motor.
Polygon motor trouble.
LSU control PWB trouble.
Connection trouble of the connector and the 
harness.

Check & Remedy

Use SIM61-1 to check the operation of the polygon 
motor.
Check connection of the connector and the harness.
Replace the polygon motor.
Replace the LSU.
Replace the LSU control PWB.

Trouble content

Detail

PCU

Cause

No full wave signal is detected.
PCU PWB trouble
Power unit trouble.
Connection trouble of the connector and the 
harness.

Check & Remedy

Replace the PCU PWB.
Replace the power unit.
Check connection of the connector and the harness.

Trouble content

Detail

PCU

Cause

An abnormality in the full wave signal frequency is 
detected.
(The frequency is detected as 65Hz or above, or 
45Hz or less.)PCU PWB trouble.
Power unit trouble.
Connection trouble of the connector and the 
harness.
Power frequency, waveform abnormality.

Check & Remedy

Replace the PCU PWB.
Replace the power unit.
Check connection of the connector and the harness.
Check the power waveform.

MX-4101N  SELF DIAG AND TROUBLE CODE  7 – 23

 

 

 

 

 

 

 

 

 

Trouble content

Detail

MFP

Cause

Mother board PWB - MFPC PWB connection trouble.
MFP PWB trouble.
Replace the mother board.

Check & Remedy

Check connection between the mother board and the 
MFPC PWB.
Check the earth line of the main unit.
Replace the MFPC PWB.
Replace the mother board.

Trouble content

Detail

MFP

Cause

The personal counter is not installed.
The personal counter is not detected.

Check & Remedy

Check connection of the connectors and the 
harness.
Replace the SCU PWB.

Trouble content

Backup SRAM battery voltage fall.

Detail

MFP

Case 1

Cause

1)

Battery life

2)

Battery circuit abnormality

Check & 
Remedy

Check to confirm that the battery voltage is 
about 2.0V or above.

Trouble content

Detail

MFP

Cause

MFP PWB EEPROM trouble.
EEPROM socket contact trouble.
MFP PWB trouble.
Strong external noises.

Check & Remedy

Replace the MFP PWB EEPROM.
Replace the MFP PWB.
Check the power environment.

Trouble content

Detail

MFP

Cause

The HDD or the MFP PWB which differs from that 
before turning OFF the power is installed.
HDD trouble.
MFP PWB trouble.

Check & Remedy

Use SIM16 to cancel the error.
If there is backup data (export data by device 
cloning), import it.

Trouble content

Detail

MFP

Cause

SRAM user index information (user authentication 
basic data) check sum error.
MFP PWB SRAM trouble.
Strong external noises.

Check & Remedy

Use SIM16 to cancel the error.
Transfer the user index information data in the HDD 
to the SRAM.
Replace the MFP PWB.

Trouble content

Detail

MFP

Cause

MFP PWB EEPROM trouble.
EEPROM socket contact trouble.
MFP PWB trouble.
Strong external noises.

Check & Remedy

Use SIM16 to cancel the error.
Replace the MFP PWB.

Trouble content

Detail

MFP

Cause

The identifier which controls the communication 
management table stored in the SRAM and the 
FAX soft switch is not detected correctly. 
MFP PWB SRAM trouble.
MFP PWB trouble.
Strong external noises.

Check & Remedy

Since the data of the communication management 
table and the FAX soft switch stored in the SRAM 
are initialized when an error occurs, register the 
deleted data again individually.
Use SIM16 to cancel the error.
Replace the MFP PWB.

Trouble content

MFP PWB SRAM memory individual data check sum 
error.

Detail

MFP

Cause

The check sum value for individual data of the 
communication table and the sender registration 
does not match.
MFP PWB SRAM trouble.
MFP PWB trouble.
Strong external noises.

Check & Remedy

Turn OFF/ON the  power to initialize the data related 
to the content of check sum error.
Since the registered contents are deleted, register 
the deleted contents again.
Use SIM16 to cancel the error.
Replace the MFP PWB.

MX-4101N  SELF DIAG AND TROUBLE CODE  7 – 24

 

 

 

 

 

 

 

 

 

Trouble content

Detail

MFP

Cause

MFP PWB SRAM trouble.
MFP PWB trouble.
Strong external noises.

Check & Remedy

Use SIM16 to cancel the error.

Trouble content

Detail

MFP

Cause

Inconsistency between the manufacturing No. saved 
in the PCU PWB and that in the MFP PWB.
When replacing the PCU PWB or the MFP PWB, the 
EEPROM which was mounted on the PWB before 
replacement is not mounted on the new PWB.
MFP PWB trouble.
PCU PWB trouble

Check & Remedy

Check that the EEPROM is properly set.
Check to confirm that the EEPROM which was 
mounted on the PWB before replacement is 
mounted on the new PWB.
Replace the MFP PWB.
Replace the PCU PWB.

Trouble content

Detail

MFP

Cause

HDD trouble.
MFP PWB trouble.
Strong external noises.

Check & Remedy

Initialize the data (one-touch, group, program, etc.) 
related to the check sum error by turning OFF/ON 
the power.
Since the registered contents are deleted, register 
the deleted contents again.
Use SIM16 to cancel the error.
Replace the HDD.
Replace the MFP PWB.

Trouble content

Detail

MFP

Cause

Watermark data trouble

Check & Remedy

Use SIM49-5 to upload the watermark data.

Trouble content

Detail

SCU

Cause

SCU PWB EEPROM trouble.
SCU PWB trouble.
EEPROM socket contact trouble.

Check & Remedy

Replace the SCU PWB EEPROM.
Replace the SCU PWB.
Check contact of the EEPROM socket.
Put down the counter/adjustment values in the 
simulation to prevent against loss of the counter data 
and the adjustment values.
Use SIM16 to cancel the trouble.

Trouble content

Detail

SCU

Cause

SCU PWB EEPROM trouble.
Installation of non-initialized EEPROM.
SCU PWB trouble.
EEPROM socket contact trouble.

Check & Remedy

Replace the SCU PWB EEPROM.
Replace the SCU PWB.
Check contact of the EEPROM socket.
Put down the counter/adjustment values in the 
simulation to prevent against loss of the counter data 
and the adjustment values.
Use SIM16 to cancel the trouble.

Trouble content

Detail

PCU

Cause

PCU PWB EEPROM trouble.
Installation of non-initialized EEPROM.
PCU PWB trouble
EEPROM socket contact trouble.

Check & Remedy

Replace the PCU PWB EEPROM.
Replace the PCU PWB.
Check contact of the EEPROM socket.
Put down the counter/adjustment values in the 
simulation to prevent against loss of the counter data 
and the adjustment values.
Use SIM16 to cancel the trouble.

Trouble content

Detail

PCU

Cause

PCU PWB EEPROM trouble.
Installation of non-initialized EEPROM.
PCU PWB trouble
EEPROM socket contact trouble.

Check & Remedy

Replace the PCU PWB EEPROM.
Replace the PCU PWB.
Check contact of the EEPROM socket.
Put down the counter/adjustment values in the 
simulation to prevent against loss of the counter data 
and the adjustment values.
Use SIM16 to cancel the trouble.

Trouble content

Detail

SCU

Cause

Connector, harness connection trouble.
SCU PWB trouble.
DSPF PWB trouble.

Check & Remedy

Turn OFF/ON the power.
Check connection of the connector and the harness.
Replace the SCU PWB.
Replace the DSPF PWB.