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MX-B200  SIMULATION, TROUBLE CODES  10 - 22

64

01

Self print

[Function]
The status of the optical section is ignored and printing of one page is made. Also when the
print command is received from the host, printing is made.

When this simulation is executed, warm-up is performed and the ready lamp is lighted. (Since,
however, the scanner is disabled, initializing is not made.)

Enter the code number and press [START] key to start paper feed from the selected cassette
and print in the selected pattern.

* For 4 – 99, flip.

[Operation]
The operation is similar to simulation 26-02.

Main 
code

Sub 

code

Contents

Details of function/operation

Code number

Pattern 

Display item

0

1by2

1  BY  2

1

Grid pattern 

CHECK

2

White paper 

WHITE

3

Black background

BLACK

Main 
code

Sub 

code

Details of trouble

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

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.

L3

00

Scanner return trouble

L4

01

Main motor lock detection

31

Exhaust fan motor lock detection trouble

L6

10

Polygon motor lock detection

U2

00

EEPROM read/write error (Serial communication 
error)

11

Counter check sum error (EEPROM)

Main 
code

Sub 

code

Details of trouble

E7

01

Content

Image data error

Detail

Communication error with the E-sort 
module
MCU PWB trouble
ASIC trouble

Check 
and 
remedy

Check if it occurs again when the power 
is turned OFF and ON. If so, replace the 
PWB.

06

Content

Image data decode error

Detail

Image expansion error

Cause

MCU PWB abnormality
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.

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 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.

MX-B200  SIMULATION, TROUBLE CODES  10 - 23

E7

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.

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.

Main 
code

Sub 

code

Details of trouble

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.

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.

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.

Main 
code

Sub 

code

Details of trouble

MX-B200  SIMULATION, TROUBLE CODES  10 - 24

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.

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.

Main 
code

Sub 

code

Details of trouble

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.

31

Content

Exhaust fan motor lock detection trouble

Detail

The error detection is started after 2 sec 
from starting rotation of the exhaust fan 
motor.
1) The continuous rotation state of 

250ms is not detected for 1 sec after 
starting detection.

2) When the lock sensor (in the exhaust 

fan) detects the HIGH level (unstable) 
after detection the lock state (stable 
state).

Cause

Exhaust fan motor connector connection 
trouble
Exhaust fan motor trouble
MCU PWB trouble

Check 
and 
remedy

Exhaust fan motor connector connection 
check
Exhaust fan motor replacement
Replace the MCU PWB.

Main 
code

Sub 

code

Details of trouble

MX-B200  SIMULATION, TROUBLE CODES  10 - 25

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 25-10 to check the polygon 
motor operations.
Check connection of the polygon motor 
harness/connector.
Replace the polygon motor.
Replace the MCU PWB.

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.

Main 
code

Sub 

code

Details of trouble