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MX-B201/B201D  SIMULATION, TROUBLE CODES  10 - 42

：'11/Oct/17

Main 
code

Sub 

code

Details of trouble

A0

30

Machine configuration error

E1

00

Network board communication trouble

01

Network board command time out error

80

Network board communication interface error
(Break in)

81

Network board communication interface error (Parity)

82

Network board communication interface error 
(Overrun)

84

Network board communication interface error 
(Framing)

E7

01

Image data error

06

Image data decode error

10

Shading trouble (Black correction)

11

Shading trouble (White correction)

16

Abnormal laser output

20

LSU trouble

F2

64

Toner supply abnormality

70

Improper cartridge

74

Toner cartridge CRUM error

F5

02

Copy lamp lighting abnormality

F6

60

AFAX plug detect error

90

AFAX USB communicate error

92

ANB flash error

94

AFAX register error

H2

00

Thermistor open

H3

00

Heat roller high temperature detection

H4

00

Heat roller low temperature detection

L1

00

Feeding is not completed within the specified time 
after starting feeding. (The scan head locking switch 
is locked)

L3

00

Scanner return trouble

L4

01

Main motor lock detection

31

Fan motor lock detection trouble

L6

10

Polygon motor lock detection

U1

03

Network board battery error

U2

00

EEPROM read/write error (Serial communication 
error)

11

Counter check sum error (EEPROM)

U9

99

Panel language error

Main 
code

Sub 

code

Details of trouble

A0

30

Content Machine configuration error

Detail

Discrepancy in the machine composition

Cause

Discrepancy with the machine 
configurations. (ANB/AFAX) 
EEPROM data error

Check 
and 
remedy

Check to confirm that the machine 
configurations are compatible with the 
product specifications.
Replace the EEPROM.

E1

00

Content Network board communication trouble
Detail

An abnormality occurs in communication 
between the MCU and the network board.

Cause

Improper connection of the network board 
cable 
Improper firmware
Network board abnormality
MCU abnormality

Check 
and 
remedy

Check connection of the network board 
cable.
Update firmware.
Replace the MCU and network board with 
new one.

01

Content Network board command time out error
Detail

MCU cannot receive response from the 
network board while 30sec.

Cause

Improper connection of the network board 
cable 
Improper firmware
Network board abnormality
MCU abnormality

Check 
and 
remedy

Check connection of the network board 
cable.
Update firmware.
Replace the MCU and network board with 
new one.

80

Content Network board communication interface 

error (Break in)

Detail

A break in error occurs in communication 
between the CPU and the network board.

Cause

Improper connection of the network board 
cable
Improper firmware
Network board abnormality
MCU abnormality

Check 
and 
remedy

Check connection of the network board 
cable.
Update firmware.
Replace the MCU and network board with 
new one.

81

Content Network board communication interface 

error (Parity)

Detail

A parity error occurs in communication 
between the MCU and the network board.

Cause

Improper connection of the network board 
cable
Improper firmware
Network board abnormality
MCU abnormality

Check 
and 
remedy

Check connection of the network board 
cable.
Update firmware.
Replace the MCU and network board with 
new one.

MX-B201/B201D  SIMULATION, TROUBLE CODES  10 - 43

：'11/Oct/17

E1

82

Content Network board communication interface 

error (Overrun)

Detail

An overrun error occurs in communication 
between the MCU and the network board.

Cause

Improper connection of the network board 
cable
Improper firmware
Network board abnormality
MCU abnormality

Check 
and 
remedy

Check connection of the network board 
cable.
Update firmware.
Replace the MCU and network board with 
new one.

84

Content Network board communication interface 

error (Framing)

Detail

A framing error occurs in communication 
between the MCU and the network board.

Cause

Improper connection of the network board 
cable
Improper firmware
Network board abnormality
MCU abnormality

Check 
and 
remedy

Check connection of the network board 
cable.
Update firmware.
Replace the MCU and network board with 
new one.

E7

01

Content Image data error

Detail

1) The memory capacity for the duplex 

model machine is improper.
Insufficient memory capacity

2) Duplex setting for the single-surface 

model.

Cause

1) The memory capacity on the MCU PWB 

is improper.

2) Wrong setting for the single-surface 

model.

Check 
and 
remedy

1) Use SIM26-39 to check to confirm that the 

memory capacity is 64MB. If it is not 
64MB, replace the MCU PWB.

2) If SIM26-04 is set to 1, set it to 0. If the 

setting is 0, replace the MCU PWB.

06

Content Image data decode error

Detail

Image expansion error

Cause

MCU PWB error
USB cable trouble

Check 
and 
remedy

Replace the MCU PWB.
Replace the USB cable.

10

Content Shading trouble (Black correction)

Detail

The CCD black scan level is abnormal when 
the shading.

Cause

Improper connection of the CCD unit flat 
cable
CCD unit abnormality
MCU PWB abnormality

Check 
and 
remedy

Check connection of the CCD unit flat cable.
Check the CCD unit.

Main 
code

Sub 

code

Details of trouble

E7

11

Content Shading trouble (White correction)
Detail

The CCD white scan level is abnormal when 
the shading.

Cause

Improper connection of the CCD unit flat 
cable
Dirt on the mirror, the lens, and the reference 
white plate
Copy lamp lighting abnormality
CCD unit abnormality
MCU PWB abnormality
(When occurred in the SPF/RSPF scan 
position.)
Improper installation of the mirror unit

Check 
and 
remedy

Clean the mirror, lens, and the reference 
white plate.
Check the light quantity and lighting status of 
the copy lamp (SIM 05-03).
Check the MCU PWB.

16

Content Abnormal laser output

Detail

When the laser output is stopped, HSYNC is 
detected.

Cause

Laser abnormality
MCU PWB abnormality.

Check 
and 
remedy

Check the laser emitting diode operation.
Replace the MCU PWB.

20

Content LSU trouble

Detail

The BD signal from the LSU cannot be 
detected in a certain cycle. (Always OFF or 
always ON)

Cause

LSU connector or LSU harness defect or 
disconnection
Polygon motor rotation abnormality
Laser beams are not generated.
MCU PWB abnormality.

Check 
and 
remedy

Check connection of the LSU connector.
Execute SIM 61-03 to check the LSU 
operations.
Check that the polygon motor rotates 
normally.
Check that the laser emitting diode 
generates laser beams.
Replace the LSU unit.
Replace the MCU PWB.

F2

64

Content Toner supply abnormality
Detail

The maximum toner supply time is greatly 
exceeded.

Cause

CRUM chip trouble
Improper developing unit

Check 
and 
remedy

Replace the CRUM chip.
Replace the developing unit.

70

Content Improper cartridge
Detail

The destination of the main unit differs from 
that of the CRUM.
When the life cycle information is other than 
Not Used (FFh).

Cause

CRUM chip trouble
Improper developing unit

Check 
and 
remedy

Replace the CRUM chip.
Replace the developing unit.

Main 
code

Sub 

code

Details of trouble

MX-B201/B201D  SIMULATION, TROUBLE CODES  10 - 44

：'11/Oct/17

F2

74

Content Toner cartridge CRUM error
Detail

MCU

Cause

Toner cartridge (CRUM) trouble.
MCU PWB trouble.
Connector/harness trouble.

Check 
and 
remedy

Replace the toner cartridge.
Replace the MCU PWB.
Connector and harness check.

F5

02

Content Copy lamp lighting abnormality
Detail

The copy lamp does not turn on.

Cause

Copy lamp abnormality
Copy lamp harness abnormality
CCD PWB harness abnormality.

Check 
and 
remedy

Use SIM 5-3 to check the copy lamp 
operations.
When the copy lamp lights up.
Check the harness and the connector 
between the CCD unit and the MCU PWB.
When the copy lamp does not light up.
Check the harness and the connector 
between the copy lamp unit and the MCU 
PWB.
Replace the copy lamp unit.
Replace the MCU PWB.

F6

60

Content AFAX plug detect error
Detail

For USB connection with AFAX, ANB cannot 
detect the connection with AFAX.

Cause

USB connected error between ANB and 
AFAX

Check 
and 
remedy

Replace the ANB PWB or AFAX PWB.

90

Content AFAX USB communicate error
Detail

For interface, ANB cannot be communicated 
with AFAX.

Cause

Interface error between ANB and AFAX

Check 
and 
remedy

Check the connection between ANB and 
AFAX. 
Replace the ANB PWB or AFAX PWB.

92

Content ANB flash error

Detail

Can not read /write to Flash ROM on the 
ANB PWB.

Cause

Access error to Flash ROM.

Check 
and 
remedy

Replace the ANB PWB.

94

Content AFAX register error

Detail

Can not access to MODEM on the AFAX 
PWB.

Cause

Access error to MODEM

Check 
and 
remedy

Replace AFAX PWB.

H2

00

Content Thermistor open
Detail

The thermistor is open.
The fusing unit is not installed.

Cause

Thermistor abnormality
Control PWB abnormality
Fusing section connector disconnection
The fusing unit is not installed.

Check 
and 
remedy

Check the harness and the connector 
between the thermistor and the PWB.
Use SIM 14 to clear the self diagnostic 
display.

Main 
code

Sub 

code

Details of trouble

H3

00

Content Heat roller high temperature detection
Detail

The fusing temperature exceeds 240°C.

Cause

Thermistor abnormality
Control PWB abnormality
Fusing section connector disconnection.

Check 
and 
remedy

Use SIM 5-02 to check the heater lamp 
blinking operation.
When the lamp blinks normally.
Check the thermistor and its harness.
Check the thermistor input circuit on the 
control PWB.
When the lamp keeps ON.
Check the power PWB and the lamp control 
circuit on the MCU PWB.
Use SIM 14 to clear the self diagnostic 
display.

H4

00

Content Heat roller low temperature detection
Detail

1) When the target temperature (165°C) is 

not reached in 55 sec after starting 
warming-up.

2) When the temperature below 100°C is 

detected for 300ms under the ready print 
state.

∗ "Starting warming-up" means not only that 

in power supply but also reset that in reset 
from shut-off and in side door close. (The 
timing of generating H4 is not limited to 
that in power supply.)

Cause

Thermistor abnormality
Heater lamp abnormality
Thermostat abnormality
Control PWB abnormality

Check 
and 
remedy

Use SIM 5-02 to check the heater lamp 
blinking operation.
When the lamp blinks normally.
Check the thermistor and its harness.
Check the thermistor input circuit on the 
control PWB.
When the lamp does not light up.
Check for disconnection of the heater lamp 
and the thermostat. Check the interlock 
switch.
Check the power PWB and the lamp control 
circuit on the MCU PWB.
Use SIM 14 to clear the self diagnostic 
display.

Main 
code

Sub 

code

Details of trouble

MX-B201/B201D  SIMULATION, TROUBLE CODES  10 - 45

：'11/Oct/17

L1

00

Content Feeding is not completed within the 

specified time after starting feeding. (The 
scan head locking switch is locked)

Detail

The white area and the black marking on the 
shading plate are used to obtain the 
difference in the CCD level values for 
judgment of lock. When the difference in the 
levels of which and black is small, it is judged 
that the black mark could not be scanned by 
lock and the trouble code "L1" is displayed.

Cause

The scan head is locked by the lock switch.
Mirror unit abnormality
The scanner wire is disconnected.
The origin detection sensor abnormality
Mirror motor harness abnormality

Check 
and 
remedy

Check to confirm that the scan head lock 
switch is released.
Use SIM 1-1 to check the mirror 
reciprocating operations.
When the mirror does not feed.
Check for disconnection of the scanner wire.
Check the harness and the connector 
between the mirror motor and the MCU 
PWB.
Replace the mirror unit.
Replace the MCU PWB.
When the mirror does feed.
Use SIM 1-2 to check the mirror home 
position sensor.

L3

00

Content Scanner return trouble

Detail

When the mirror base is returned for the 
specified time (6 sec) in mirror initializing 
after turning on the power, the mirror home 
position sensor (MHPS) does not turn ON. 
Or when the mirror base is returned for the 
specified time (about 6 sec) after start of 
copy return, the mirror home position sensor 
(MHPS) does not turn ON.

Cause

Mirror unit abnormality
Scanner wire disconnection
Origin detection sensor abnormality
Mirror motor harness abnormality

Check 
and 
remedy

Use SIM 1-1 to check the mirror 
reciprocating operations.
When the mirror does not return.
Check for disconnection of the scanner wire.
Check the harness and the connector 
between the mirror motor and the MCU 
PWB.
Replace the mirror unit.
Replace the MCU PWB.
When the mirror does feed.
Use SIM 1-2 to check the mirror home 
position sensor.

L4

01

Content Main motor lock detection
Detail

When the main motor encoder pulse is not 
detected for 100 msec.

Cause

Main motor unit abnormality
Improper connection or disconnection the 
main motor and the harness.
MCU PWB abnormality

Check 
and 
remedy

Use SIM 25-01 to check the main motor 
operations.
Check connection of the main motor 
harness/connector.
Replace the main motor.
Replace the MCU PWB.

Main 
code

Sub 

code

Details of trouble

L4

31

Content Fan motor lock detection trouble
Detail

The fan does not rotate.
When sampling is made in an interval of 
50msec, the normal signals are not detected 
5 times continuously in 1 sec.

Cause

FAN trouble or harness contact trouble and 
disconnection.

Check 
and 
remedy

Check connection of the FAN harness and 
connector.
Replace the FAN.
Replace the MCU PWB.

L6

10

Content Polygon motor lock detection
Detail

The lock signal (specified rpm signal) does 
not return within a certain time (about 20 
sec) from starting the polygon motor 
rotation.

Cause

Polygon motor unit abnormality
Improper connection or disconnection of the 
polygon motor and the harness.
MCU PWB abnormality

Check 
and 
remedy

Use SIM 61-1 to check the polygon motor 
operations.
Check connection of the polygon motor 
harness/connector.
Replace the polygon motor.
Replace the MCU PWB.

U1

03

Content Network board battery error

Details

The RTC backup battery voltage on network 
PWB falls.

Cause

The RTC backup battery voltage on network 
PWB falls.

Check 
and 
remedy

Check voltage of the RTC back up battery.
Replace the battery.

U2

00

Content EEPROM read/write error (Serial 

communication error)

Detail

EEPROM access process error

Cause

EEPROM abnormality

Check 
and 
remedy

Check that the EEPROM is properly set.
Use SIM 16 to cancel the trouble.
Replace the MCU PWB.

11

Content Counter check sum error (EEPROM)

Detail

Check sum error of the counter area in the 
EEPROM

Cause

EEPROM abnormality

Check 
and 
remedy

Check that the EEPROM is properly set.
Use SIM 16 to cancel the trouble.
Replace the MCU PWB.

U9

99

Content Panel language error
Detail

Improper language data

Cause

A improper language data was downloaded.

Check 
and 
remedy

Update LCD data.

Main 
code

Sub 

code

Details of trouble