MX-M350N, MX-M350U, MX-M450N, MX-M450U (serv.man8). Trouble Codes - Sharp Copying Equipment Service Manual (repair manual). Page 7

MX-M350/M450 N/U  TROUBLE CODES  11 - 7

F1

36

Content

Console finisher punch timing sensor 
trouble

Detail

Sensor input value abnormality

Cause

Sensor breakage
Harness disconnection
Console finisher control PWB trouble

Check and 
remedy

Use SIM3-2 to check the sensor 
operation.

37

Content

Console finisher backup RAM trouble

Detail

Backup RAM contents are disturbed.

Cause

Console finisher control PWB trouble
Malfunction by noise

Check and 
remedy

Replace the console finisher control 
PWB.

38

Content

Console finisher punch backup RAM 
trouble

Detail

Punch unit backup RAM contents are 
disturbed.

Cause

Punch control PWB trouble
Malfunction by noise

Check and 
remedy

Replace the punch control PWB.

39

Content

Console finisher punch dust sensor 
trouble

Detail

Punch dust sensor detection trouble

Cause

When the punch dust sensor is not 
normally detected.

Check and 
remedy

Sensor breakage
Harness disconnection
Punch control PWB trouble

40

Content

Console finisher punch power 
interruption trouble

Detail

When power interruption of the punch 
unit is detected

Cause

Though 24V is supplied to the punch 
unit, the punch unit detects power 
interruption.

Check and 
remedy

Harness disconnection
Punch control PWB trouble

80

Content

Finisher power abnormality

Detail

The 24V power is not supplied to the 
finisher PWB. 

Cause

Improper connection or disconnection 
of connector and harness
Finisher control PWB trouble
Power unit trouble

Check and 
remedy

Use SIM3-2 to check the sensor.

80

Content

Mail-bin stacker power abnormality

Detail

The 24V power is not supplied to the 
Mail-bin stacker PWB.

Cause

Improper connection or disconnection 
of connector and harness
Mail-bin stacker control PWB trouble
Power unit trouble

Check and 
remedy

Use SIM3-20 to check the sensor 
operation.

81

Content

Console finisher transport motor 
abnormality

Detail

Transport motor trouble

Cause

Motor lock
Motor rpm abnormality
Overcurrent to the motor
Console finisher control PWB trouble

Check and 
remedy

Use SIM3-3 to check the motor 
operation.

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Details

F1

87

Content

Finisher staple rotation motor trouble

Detail

Front staple rotation motor trouble

Cause

Motor lock
Drive abnormality
Defective connection or disconnection 
between the PWB and the motor.
Home position sensor abnormality
Motor rpm abnormality
Overcurrent to the motor
Finisher control PWB trouble

Check and 
remedy

Use SIM3-3 to check the motor 
operation.

F2

00

Content

Toner control sensor open/sensor 
trouble

Detail

Toner control sensor output open

Cause

Connector harness trouble
Connector disconnection
Sensor trouble

Check and 
remedy

Check connection of the toner control 
sensor.
Check connection of connector and 
harness to the main PWB. 
Check for disconnection of harness.
Replace the sensor.

02

Content

Toner supply abnormality

Detail

Toner control sensor output value 
becomes under-toner too earlier.

Cause

Connector harness trouble
Toner concentration sensor trouble
Toner cartridge trouble

Check and 
remedy

Check connection of the connector in 
the toner motor section.
Check connection of connector and 
harness to the main PWB. 
Check for disconnection of harness.
Toner concentration sensor output 
check SIM25-1.
Replace the toner cartridge.

04

Content

Improper cartridge (life cycle error, etc.)

Detail

An improper process cartridge is 
inserted.

Cause

IC chip trouble
Improper cartridge

Check and 
remedy

Insert a proper cartridge.

05

Content

CRUM error

Detail

Communication with IC chip cannot be 
made.

Cause

IC chip trouble
IC chip contact failure
Improper cartridge

Check and 
remedy

Insert a proper cartridge.
Is the cartridge installed properly?

06

Content

CRUM ID error

Detail

IC chip trouble

Cause

Improper cartridge

Check and 
remedy

Insert a proper cartridge.

MAIN SUB

Details