Sharp MX-C300P / MX-C300PE / MX-C300PL Service Manual ▷ View online
MX-C300P TROUBLESHOOTING 7 – 8
F2-70
Improper toner cartridge detection
(K)
(K)
F2-71
Improper toner cartridge detection
(C)
(C)
F2-72
Improper toner cartridge detection
(M)
(M)
F2-73
Improper toner cartridge detection
(Y)
(Y)
F2-74
Toner cartridge CRUM error (K)
F2-75
Toner cartridge CRUM error (C)
F2-76
Toner cartridge CRUM error (M)
F2-77
Toner cartridge CRUM error (Y)
F2-78
Image density sensor for the registra-
tion trouble (transfer belt reflection
rate trouble)
tion trouble (transfer belt reflection
rate trouble)
F3-22
Paper feed tray 2 lift operation trouble
H2-00
Thermister open trouble
(TH_UM_AD2)
(TH_UM_AD2)
Cause
An improper toner cartridge is inserted. (The main
unit detects a toner cartridge of a different
specification.)
Toner cartridge trouble.
MFPC PWB trouble
unit detects a toner cartridge of a different
specification.)
Toner cartridge trouble.
MFPC PWB trouble
Check & Remedy
Replace the toner cartridge.
Replace the MFPC PWB.
Replace the MFPC PWB.
Cause
An improper toner cartridge is inserted. (The main
unit detects a toner cartridge of a different
specification.)
Toner cartridge trouble.
MFPC PWB trouble.
unit detects a toner cartridge of a different
specification.)
Toner cartridge trouble.
MFPC PWB trouble.
Check & Remedy
Replace the toner cartridge.
Replace the MFPC PWB.
Replace the MFPC PWB.
Cause
An improper toner cartridge is inserted. (The main
unit detects a toner cartridge of a different
specification.)
Toner cartridge trouble.
MFPC PWB trouble.
unit detects a toner cartridge of a different
specification.)
Toner cartridge trouble.
MFPC PWB trouble.
Check & Remedy
Replace the toner cartridge.
Replace the MFPC PWB.
Replace the MFPC PWB.
Cause
An improper toner cartridge is inserted. (The main
unit detects a toner cartridge of a different
specification.)
Toner cartridge trouble.
MFPC PWB trouble.
unit detects a toner cartridge of a different
specification.)
Toner cartridge trouble.
MFPC PWB trouble.
Check & Remedy
Replace the toner cartridge.
Replace the MFPC PWB.
Replace the MFPC PWB.
Cause
Toner cartridge (CRUM) trouble.
MFPC PWB trouble.
Connector/harness trouble.
MFPC PWB trouble.
Connector/harness trouble.
Check & Remedy
Replace the toner cartridge.
Replace the MFPC PWB.
Connector/harness trouble.
Replace the MFPC PWB.
Connector/harness trouble.
Cause
Toner cartridge (CRUM) trouble.
MFPC PWB trouble.
Connector/harness trouble.
MFPC PWB trouble.
Connector/harness trouble.
Check & Remedy
Replace the toner cartridge.
Replace the MFPC PWB.
Connector/harness trouble.
Replace the MFPC PWB.
Connector/harness trouble.
Cause
Toner cartridge (CRUM) trouble.
MFPC PWB trouble.
Connector/harness trouble.
MFPC PWB trouble.
Connector/harness trouble.
Check & Remedy
Replace the toner cartridge.
Replace the MFPC PWB.
Connector/harness trouble.
Replace the MFPC PWB.
Connector/harness trouble.
Cause
Toner cartridge (CRUM) trouble.
MFPC PWB trouble.
Connector/harness trouble.
MFPC PWB trouble.
Connector/harness trouble.
Check & Remedy
Replace the toner cartridge.
Replace the MFPC PWB.
Connector/harness trouble.
Replace the MFPC PWB.
Connector/harness trouble.
Cause
Image density sensor trouble
Connection trouble between the MFPC PWB and
the image density sensor
Dirt of the image density sensor
Cleaning failure of the transfer belt
Calibration plate solenoid operation error
Connection trouble between the MFPC PWB and
the image density sensor
Dirt of the image density sensor
Cleaning failure of the transfer belt
Calibration plate solenoid operation error
Check & Remedy
Connector/harness trouble
Check Calibration plate solenoid operation
Check the surface of the transfer belt
Replace the image density sensor
Replace the transfer belt
Replace the calibration plate solenoid
Replace the MPFC PWB
Check Calibration plate solenoid operation
Check the surface of the transfer belt
Replace the image density sensor
Replace the transfer belt
Replace the calibration plate solenoid
Replace the MPFC PWB
Cause
LUD1 is not turned ON within the specified time.
C2LUD1sensor trouble
Paper feed tray 2 lift unit trouble.
MFPC PWB trouble.
Harness and connector connection trouble.
C2LUD1sensor trouble
Paper feed tray 2 lift unit trouble.
MFPC PWB trouble.
Harness and connector connection trouble.
Check & Remedy
Check connection of the harness and the
connector of C2LUD.
Replace the lift-up unit.
Replace the MFPC PWB.
connector of C2LUD.
Replace the lift-up unit.
Replace the MFPC PWB.
Cause
Thermister trouble.
MFPC PWB trouble
Connection trouble of the connector and the
harness.
Fusing unit not installed.
MFPC PWB trouble
Connection trouble of the connector and the
harness.
Fusing unit not installed.
Check & Remedy
Replace the thermister.
Replace the MFPC PWB.
Harness and connector connection trouble.
Replace the MFPC PWB.
Harness and connector connection trouble.
MX-C300P TROUBLESHOOTING 7 – 9
H2-02
Sub thermister open trouble (TH_US)
H2-03
Compensation thermister open
trouble (TH_UM_AD1)
trouble (TH_UM_AD1)
H3-00
Fusing section high temperature
trouble (TH_UM)
trouble (TH_UM)
H3-02
Fusing section high temperature
trouble (TH_US)
trouble (TH_US)
H4-00
Fusing section low temperature
trouble (TH_UM_AD2)
trouble (TH_UM_AD2)
H5-01
5 times continuous POD1 not-reach
jam
jam
H7-10
Fusing low temperature recovery
trouble (TH_UM_AD2).
trouble (TH_UM_AD2).
Cause
Thermister trouble.
MFPC PWB trouble.
Connection trouble of the connector and the
harness.
Fusing unit not installed.
MFPC PWB trouble.
Connection trouble of the connector and the
harness.
Fusing unit not installed.
Check & Remedy
Replace the thermister.
Replace the MFPC PWB.
Harness and connector connection trouble.
Replace the MFPC PWB.
Harness and connector connection trouble.
Cause
Thermister trouble.
MFPC PWB trouble
Connection trouble of the connector and the
harness.
Fusing unit not installed.
MFPC PWB trouble
Connection trouble of the connector and the
harness.
Fusing unit not installed.
Check & Remedy
Replace the thermister.
Replace the MFPC PWB.
Harness and connector connection trouble.
Replace the MFPC PWB.
Harness and connector connection trouble.
Cause
The fusing temperature exceeds the specified
level.
Thermister trouble.
MFPC PWB trouble
Connection trouble of the connector and the
harness.
Power unit trouble.
level.
Thermister trouble.
MFPC PWB trouble
Connection trouble of the connector and the
harness.
Power unit trouble.
Check & Remedy
Use SIM5-2 to check the flashing operation of the
heater lamp.
Use SIM14 to cancel the trouble.
Replace the thermister.
Replace the MFPC PWB.
Harness and connector connection trouble.
Replace the power unit.
heater lamp.
Use SIM14 to cancel the trouble.
Replace the thermister.
Replace the MFPC PWB.
Harness and connector connection trouble.
Replace the power unit.
Cause
The fusing temperature exceeds the specified
level.
Thermister trouble.
MFPC PWB trouble
Connection trouble of the connector and the
harness.
Power unit trouble.
level.
Thermister trouble.
MFPC PWB trouble
Connection trouble of the connector and the
harness.
Power unit trouble.
Check & Remedy
Use SIM5-2 to check the flashing operation of the
heater lamp.
Use SIM14 to cancel the trouble.
Replace the thermister.
Replace the MFPC PWB.
Harness and connector connection trouble.
Replace the power unit.
heater lamp.
Use SIM14 to cancel the trouble.
Replace the thermister.
Replace the MFPC PWB.
Harness and connector connection trouble.
Replace the power unit.
Cause
The fusing temperature does not reach the
specified level within the specified time from
turning ON the power relay.
Thermister trouble.
Heater lamp trouble.
MFPC PWB trouble.
Thermostat trouble.
Connector, harness connection trouble.
Power unit trouble.
Interlock switch trouble.
specified level within the specified time from
turning ON the power relay.
Thermister trouble.
Heater lamp trouble.
MFPC PWB trouble.
Thermostat trouble.
Connector, harness connection trouble.
Power unit trouble.
Interlock switch trouble.
Check & Remedy
Replace the thermister.
Replace the heater lamp.
Replace the MFPC PWB.
Replace the thermostat.
Check connection of the connector and the
harness.
Replace the power unit.
Replace the interlock switch.
Use SIM5-2 to check the flashing operation of the
heater lamp.
Use SIM14 to cancel the trouble.
Replace the heater lamp.
Replace the MFPC PWB.
Replace the thermostat.
Check connection of the connector and the
harness.
Replace the power unit.
Replace the interlock switch.
Use SIM5-2 to check the flashing operation of the
heater lamp.
Use SIM14 to cancel the trouble.
Cause
A fusing jam is not canceled completely. (A jam
paper remains.)
POD1 sensor trouble.
Fusing unit installation trouble.
Connector, harness connection trouble.
MFPC PWB trouble
paper remains.)
POD1 sensor trouble.
Fusing unit installation trouble.
Connector, harness connection trouble.
MFPC PWB trouble
Check & Remedy
Replace the POD1 sensor.
Check the installing position of the fusing unit.
Replace the fusing unit.
Check connection of the connector and the
harness.
Replace the MFPC PWB.
Use SIM14 to cancel the trouble.
Check the installing position of the fusing unit.
Replace the fusing unit.
Check connection of the connector and the
harness.
Replace the MFPC PWB.
Use SIM14 to cancel the trouble.
Cause
The fusing temperature does not reach the
specified level within the specified time from
stopping a job due to fall in the fusing temperature.
Thermister trouble.
Heater lamp trouble.
MFPC PWB trouble
Thermostat trouble.
Connector, harness connection trouble.
Power unit trouble.
Interlock switch trouble.
specified level within the specified time from
stopping a job due to fall in the fusing temperature.
Thermister trouble.
Heater lamp trouble.
MFPC PWB trouble
Thermostat trouble.
Connector, harness connection trouble.
Power unit trouble.
Interlock switch trouble.
Check & Remedy
Replace the thermister.
Replace the heater lamp.
Replace the MFPC PWB.
Replace the thermostat.
Check connection of the connector and the
harness.
Replace the power unit.
Replace the interlock switch.
Use SIM5-2 to check the flashing operation of the
heater lamp.
Replace the heater lamp.
Replace the MFPC PWB.
Replace the thermostat.
Check connection of the connector and the
harness.
Replace the power unit.
Replace the interlock switch.
Use SIM5-2 to check the flashing operation of the
heater lamp.
MX-C300P TROUBLESHOOTING 7 – 10
L4-02
Paper feed motor trouble
L4-03
Fusing motor lock trouble
L4-04
Developing motor trouble (K)
L4-06
Transfer unit lift trouble
L4-17
Drum motor lock trouble
L4-32
Power source cooling fan trouble
L4-34
LSU fan trouble
L4-35
Fusing cooling fan trouble
Trouble content
A lock signal is not detected within the specified time
in ON operation of the paper feed motor after
warming-up or canceling a jam.
in ON operation of the paper feed motor after
warming-up or canceling a jam.
Cause
Paper feed motor trouble
Paper feed motor harness and connector connection
trouble
MFPC PWB trouble
Paper feed motor harness and connector connection
trouble
MFPC PWB trouble
Check & Remedy
Use SIM6-1 to check the operation of the paper feed
motor.
Replace the paper feed motor.
Check connection of the paper feed motor harness
and the connector.
Replace the MFPC PWB.
motor.
Replace the paper feed motor.
Check connection of the paper feed motor harness
and the connector.
Replace the MFPC PWB.
Cause
The motor lock signal is detected during rotation of
the fusing motor.
Fusing motor trouble.
MFPC PWB trouble.
Connection trouble of the connector and the
harness.
the fusing motor.
Fusing motor trouble.
MFPC PWB trouble.
Connection trouble of the connector and the
harness.
Check & Remedy
Use Sim6-1 to check the operation of the fusing
motor.
Replace the fusing motor.
Replace the MFPC PWB.
Check connection of the connector and the
harness.
motor.
Replace the fusing motor.
Replace the MFPC PWB.
Check connection of the connector and the
harness.
Cause
The motor lock signal is detected during rotation of
the developing motor.
Developing motor trouble.
Harness and connector connection trouble.
MFPC PWB trouble
Developing unit trouble.
the developing motor.
Developing motor trouble.
Harness and connector connection trouble.
MFPC PWB trouble
Developing unit trouble.
Check & Remedy
Use SIM25-1 to check the operation of the
developing motor.
Replace the developing motor.
Check connection of the connectors and the
harness.
Replace the MFPC PWB.
Replace the developing motor.
Replace the developing unit.
developing motor.
Replace the developing motor.
Check connection of the connectors and the
harness.
Replace the MFPC PWB.
Replace the developing motor.
Replace the developing unit.
Cause
Transfer unit position sensor trouble.
MFPC PWB trouble.
Connection trouble of the connector and the
harness.
Transfer unit separation clutch operation trouble.
Primary transfer belt unit is not installed.
MFPC 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 MFPC PWB.
Harness and connector connection trouble.
Replace the transfer unit separation clutch.
the transfer unit.
Install the primary transfer belt unit.
Replace the transfer unit position sensor.
Replace the MFPC PWB.
Harness and connector connection trouble.
Replace the transfer unit separation clutch.
Cause
Drum motor trouble
Connection trouble of the connector and the
harness between MFPC PWB and the drum motor
MFPC PWB trouble
Connection trouble of the connector and the
harness between MFPC PWB and the drum motor
MFPC PWB trouble
Check & Remedy
Check the operation of the drum motor with SIM
25-01
Check the connection of the connector and the
harness between MFPC PWB and the drum motor
Replace the drum motor
Replace the MFPC PWB
25-01
Check the connection of the connector and the
harness between MFPC PWB and the drum motor
Replace the drum motor
Replace the MFPC PWB
Cause
The fan operation signal is not detected within the
specified time in the power cooling fan operation.
Power cooling fan trouble.
MFPC PWB trouble.
Connection trouble of the connector and the
harness.
specified time in the power cooling fan operation.
Power cooling fan trouble.
MFPC 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 MFPC PWB.
Check/replace the connector or the harness.
fan.
Replace the power cooling fan.
Replace the MFPC PWB.
Check/replace the connector or the harness.
Cause
The fan rotation signal is not detected in the
specified time during operation of the LSU fan.
Connection trouble of the connector and the
harness.
LSU fan trouble.
Replace the MFPC PWB.
specified time during operation of the LSU fan.
Connection trouble of the connector and the
harness.
LSU fan trouble.
Replace the MFPC PWB.
Check & Remedy
Use Sim6-2 to check the operation of the fan.
Check connection of the connector and the
harness.
Replace the LSU fan.
Replace the MFPC PWB.
Check connection of the connector and the
harness.
Replace the LSU fan.
Replace the MFPC PWB.
Cause
The fan operation signal is not detected within the
specified time in the fusing cooling fan operation.
Fusing cooling fan trouble.
MFPC PWB trouble
Connection trouble of the connector and the
harness.
specified time in the fusing cooling fan operation.
Fusing cooling fan trouble.
MFPC 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 MFPC PWB.
Harness and connector connection trouble.
fan.
Replace the fusing cooling fan.
Replace the MFPC PWB.
Harness and connector connection trouble.
MX-C300P TROUBLESHOOTING 7 – 11
L4-40
Ozone fan motor 1 trouble
L6-10
Polygon motor trouble
L8-02
Full wave signal error
U1-01
Battery trouble
U2-00
MFPC EEPROM read/write error
U2-05
Erroneous detection of account man-
agement data
agement data
U2-06
Abnormal value of memory
(FlashROM sector management error)
(FlashROM sector management error)
U2-11
MFPC PWB EEPROM counter check
sum error
sum error
U9-00
Communication trouble between the
controller and OPU/MFPC
controller and OPU/MFPC
U9-81
OPU communication trouble (parity)
Cause
Connection trouble of the connector and the
harness between MFPC PWB and the fan motor.
MFPC PWB trouble
FAN motor trouble
The fan is not operated by other causes (the power
is not supplied.)
harness between MFPC PWB and the fan motor.
MFPC PWB trouble
FAN motor trouble
The fan is not operated by other causes (the power
is not supplied.)
Check & Remedy
Check the fan motor operation with the SIM06-02.
Check the harness and connector connection
between the MFPC PWB and the fan motor.
Replace the fan motor
Replace the MFPC PWB.
Check the harness and connector connection
between the MFPC PWB and the fan motor.
Replace the fan motor
Replace the MFPC PWB.
Cause
The motor does not reach the specified rpm in
specified time after starting rotation of the polygon
motor.
Polygon motor trouble.
LSUcnt PWB trouble.
Connection trouble of the connector and the
harness.
specified time after starting rotation of the polygon
motor.
Polygon motor trouble.
LSUcnt 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 connectors and the
harness.
Replace the polygon motor.
Replace the LSU.
motor.
Check connection of the connectors and the
harness.
Replace the polygon motor.
Replace the LSU.
Cause
An abnormality in the full wave signal frequency is
detected.
(The frequency is detected as 80Hz or above, or
30Hz or less.) MFPC PWB trouble.
Power unit trouble.
Connection trouble of the connector and the
harness.
Power frequency, waveform abnormality.
detected.
(The frequency is detected as 80Hz or above, or
30Hz or less.) MFPC PWB trouble.
Power unit trouble.
Connection trouble of the connector and the
harness.
Power frequency, waveform abnormality.
Check & Remedy
Replace the MFPC PWB.
Replace the power unit.
Check connection of the connectors and the
harness.
Check the power waveform.
Replace the power unit.
Check connection of the connectors and the
harness.
Check the power waveform.
Cause
1)
Battery life
2)
Battery circuit abnormality
Check & Remedy
Check to confirm that the battery voltage is about
2.0V or above.
Use SIM13 to cancel the trouble.
2.0V or above.
Use SIM13 to cancel the trouble.
Cause
MFPC PWB EEPROM trouble.
EEPROM socket contact trouble.
MFP PWB trouble.
Strong external noises.
EEPROM socket contact trouble.
MFP PWB trouble.
Strong external noises.
Check & Remedy
Use SIM16 to cancel the error.
Replace the MFP PWB EEPROM.
Replace the MFP PWB.
Check the power environment.
Replace the MFP PWB EEPROM.
Replace the MFP PWB.
Check the power environment.
Cause
EEPROM is broken
The device access error/connection error of
EEPROM by the noise
The device access error/connection error of
EEPROM by the noise
Check & Remedy
Cancel the error by SIM16
Cause
FlashROM Device data error
Connection error of FlashROM
Failure of the device access by the noise
Connection error of FlashROM
Failure of the device access by the noise
Check & Remedy
Take out the data saved by SIM56-02 and
import that data to the machine.
MFPC PWB replacement
import that data to the machine.
MFPC PWB replacement
Cause
MFPC PWB EEPROM trouble.
EEPROM socket contact trouble.
MFPC PWB trouble.
Strong external noises.
EEPROM socket contact trouble.
MFPC PWB trouble.
Strong external noises.
Check & Remedy
Use SIM16 to cancel the error.
Replace the MFPC PWB.
Replace the MFPC PWB.
Cause
OPU connector connection trouble
Harness trouble of MFPC PWB
Break connector pin of MFPC PWB
Lift unit trouble.
Connection trouble of the connector and the
harness.
MFPC PWB trouble
Harness trouble of MFPC PWB
Break connector pin of MFPC PWB
Lift unit trouble.
Connection trouble of the connector and the
harness.
MFPC PWB trouble
Check & Remedy
Check connector connection and harness
Replace MFPC PWB
Check ground point
Power off/on
Replace MFPC PWB
Check ground point
Power off/on
Cause
OPU connector connection trouble
Harness trouble of MFPC PWB
Break connector pin of MFPC PWB
Lift unit trouble.
Connection trouble of the connector and the
harness.
MFPC PWB trouble
Harness trouble of MFPC PWB
Break connector pin of MFPC PWB
Lift unit trouble.
Connection trouble of the connector and the
harness.
MFPC PWB trouble
Check & Remedy
Check connector connection and harness
Replace MFPC PWB
Check ground point
Power off/on
Replace MFPC PWB
Check ground point
Power off/on
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