Sharp MX-4100N / MX-4101N / MX-5000N / MX-5001N (serv.man15) Service Manual ▷ View online
MX-4101N SELF DIAG AND TROUBLE CODE 7 – 17
F2-75
Cyan CRUM error
F2-76
Magenta CRUM error
F2-77
Yellow CRUM error
F2-78
Registration image density sensor
trouble (Transfer belt substrate
reflection rate abnormality)
trouble (Transfer belt substrate
reflection rate abnormality)
F3-12
Paper feed tray 1 lift operation trouble
F3-22
Paper feed tray 2 lift operation trouble
H2-00
Thermistor open trouble
(TH_UM_AD2)
(TH_UM_AD2)
H2-01
Thermistor open trouble (TH_LM)
H2-03
Compensation thermistor open
trouble (TH_UM_AD1)
trouble (TH_UM_AD1)
H2-04
External heating thermistor open
(TH_EX1)
(TH_EX1)
Trouble content
Detail
PCU
Cause
Toner cartridge (CRUM) trouble.
PCU PWB trouble.
Connector/harness trouble.
PCU PWB trouble.
Connector/harness trouble.
Check & Remedy
Replace the toner cartridge.
Replace the PCU PWB.
Connector/harness trouble.
Replace the PCU PWB.
Connector/harness trouble.
Trouble content
Detail
PCU
Cause
Toner cartridge (CRUM) trouble.
PCU PWB trouble.
Connector/harness trouble.
PCU PWB trouble.
Connector/harness trouble.
Check & Remedy
Replace the toner cartridge.
Replace the PCU PWB.
Connector/harness trouble.
Replace the PCU PWB.
Connector/harness trouble.
Trouble content
Detail
PCU
Cause
Toner cartridge (CRUM) trouble.
PCU PWB trouble.
Connector/harness trouble.
PCU PWB trouble.
Connector/harness trouble.
Check & Remedy
Replace the toner cartridge.
Replace the PCU PWB.
Connector/harness trouble.
Replace the PCU PWB.
Connector/harness trouble.
Trouble content
Detail
PCU
Cause
Image density (registration) sensor trouble (Sensor
sensitivity adjustment trouble).
PCU PWB trouble.
Connection trouble of the connector and the
harness.
Image density (registration) sensor dirt.
Transfer belt dirt, scratch.
sensitivity adjustment trouble).
PCU PWB trouble.
Connection trouble of the connector and the
harness.
Image density (registration) sensor dirt.
Transfer belt dirt, scratch.
Check & Remedy
Replace the image density (registration) sensor.
Replace the PCU PWB.
Check connection of the connector and the harness.
Clean the image density (registration) sensor.
Clean or replace the transfer belt.
Replace the PCU PWB.
Check connection of the connector and the harness.
Clean the image density (registration) sensor.
Clean or replace the transfer belt.
Trouble content
Detail
PCU
Cause
LUD1 is not turned ON within the specified time.
CLUD1 sensor trouble
Paper feed tray 1 lift unit trouble.
PCU PWB trouble.
Harness and connector connection trouble.
CLUD1 sensor trouble
Paper feed tray 1 lift unit trouble.
PCU PWB trouble.
Harness and connector connection trouble.
Check & Remedy
Check connection of the harness and the connector
of LUD1.
Replace the lift-up unit.
Replace the PCU PWB.
of LUD1.
Replace the lift-up unit.
Replace the PCU PWB.
Trouble content
LUD2 does not turn ON within the specified time.
Detail
PCU
Cause
LUD2 does not turn ON within the specified time.
CLUD2 sensor trouble.
Paper feed tray 2 lift unit trouble.
PCU PWB trouble.
Harness and connector connection trouble.
CLUD2 sensor trouble.
Paper feed tray 2 lift unit trouble.
PCU PWB trouble.
Harness and connector connection trouble.
Check & Remedy
Check the harness and the connector of LUD2.
Replace the lift-up unit.
Replace the PCU PWB.
Replace the lift-up unit.
Replace the PCU PWB.
Trouble content
Detail
PCU
Cause
Thermistor trouble.
PCU PWB trouble
Connection trouble of the connector and the
harness.
Fusing unit not installed.
PCU PWB trouble
Connection trouble of the connector and the
harness.
Fusing unit not installed.
Check & Remedy
Replace the thermistor.
Replace the PCU PWB.
Check connection of the connector and the harness.
Replace the PCU PWB.
Check connection of the connector and the harness.
Trouble content
Detail
PCU
Cause
Thermistor trouble.
PCU PWB trouble.
Connection trouble of the connector and the
harness.
Fusing unit not installed.
PCU PWB trouble.
Connection trouble of the connector and the
harness.
Fusing unit not installed.
Check & Remedy
Replace the thermistor.
Replace the PCU PWB.
Check connection of the connector and the harness.
Replace the PCU PWB.
Check connection of the connector and the harness.
Trouble content
Detail
PCU
Cause
Thermistor trouble.
PCU PWB trouble
Connection trouble of the connector and the
harness.
Fusing unit not installed.
PCU PWB trouble
Connection trouble of the connector and the
harness.
Fusing unit not installed.
Check & Remedy
Replace the thermistor.
Replace the PCU PWB.
Check connection of the connector and the harness.
Replace the PCU PWB.
Check connection of the connector and the harness.
Trouble content
Detail
PCU
Cause
Thermistor trouble.
PCU PWB trouble.
Fusing section connector connection trouble.
Power unit trouble.
PCU PWB trouble.
Fusing section connector connection trouble.
Power unit trouble.
Check & Remedy
Check the connector and the harness between the
thermistor and the PCU PWB.
Replace the thermistor.
Replace the power unit.
thermistor and the PCU PWB.
Replace the thermistor.
Replace the power unit.
MX-4101N SELF DIAG AND TROUBLE CODE 7 – 18
H2-05
External heating thermistor open
(TH_EX2)
(TH_EX2)
H3-00
Fusing section high temperature
trouble (TH_UM)
trouble (TH_UM)
H3-01
Fusing section high temperature
trouble (TH_LM)
trouble (TH_LM)
H3-02
Fusing section high temperature
trouble (TH_US)
trouble (TH_US)
H3-04
Fusing section high temperature
trouble (TH_EX1)
trouble (TH_EX1)
H3-05
Fusing section high temperature
trouble (TH_EX2)
trouble (TH_EX2)
H4-00
Fusing section low temperature
trouble (TH_UM_AD2)
trouble (TH_UM_AD2)
Trouble content
Detail
PCU
Cause
Thermistor trouble.
PCU PWB trouble.
Connection trouble of the connector and the
harness.
PCU PWB trouble.
Connection trouble of the connector and the
harness.
Check & Remedy
Replace the thermistor.
Replace the PCU PWB.
Check connection of the connector and the harness.
Replace the PCU PWB.
Check connection of the connector and the harness.
Trouble content
Detail
PCU
Cause
The fusing temperature exceeds the specified level.
Thermistor trouble.
PCU PWB trouble
Connection trouble of the connector and the
harness.
Power unit trouble.
Thermistor trouble.
PCU 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 thermistor.
Replace the PCU PWB.
Check connection of the connector and the harness.
Replace the power unit.
heater lamp.
Use SIM14 to cancel the trouble.
Replace the thermistor.
Replace the PCU PWB.
Check connection of the connector and the harness.
Replace the power unit.
Trouble content
Detail
PCU
Cause
The fusing temperature exceeds the specified level.
Thermistor trouble.
PCU PWB trouble.Harness and connector
connection trouble.
Power unit trouble.
Thermistor trouble.
PCU PWB trouble.Harness and connector
connection trouble.
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 thermistor.
Replace the PCU PWB.
Check connection of the connector and the harness.
Replace the power unit.
heater lamp.
Use SIM14 to cancel the trouble.
Replace the thermistor.
Replace the PCU PWB.
Check connection of the connector and the harness.
Replace the power unit.
Trouble content
Detail
PCU
Cause
Thermistor trouble.
PCU PWB trouble.
Fusing section connector connection trouble.
Power unit trouble.
PCU PWB trouble.
Fusing section connector connection trouble.
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 PCU PWB.
Check connection of the thermistor and the harness.
Replace the power unit.
heater lamp.
Use SIM14 to cancel the trouble.
Replace the PCU PWB.
Check connection of the thermistor and the harness.
Replace the power unit.
Trouble content
Detail
PCU
Cause
Non-contact thermistor trouble.
PCU PWB trouble.
Fusing section connector connection trouble.
Power unit trouble.
PCU PWB trouble.
Fusing section connector connection trouble.
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 PCU PWB.
Check connection of the thermistor and the harness.
Replace the power unit.
heater lamp.
Use SIM14 to cancel the trouble.
Replace the PCU PWB.
Check connection of the thermistor and the harness.
Replace the power unit.
Trouble content
Detail
PCU
Cause
Thermistor trouble.
PCU PWB trouble.
Connection trouble of the connector and the
harness.
PCU PWB trouble.
Connection trouble of the connector and the
harness.
Check & Remedy
Use SIM14 to cancel the trouble.
Replace the thermistor.
Replace the PCU PWB.
Check connection of the connector and the harness.
Replace the thermistor.
Replace the PCU PWB.
Check connection of the connector and the harness.
Trouble content
Detail
PCU
Cause
The fusing temperature does not reach the specified
level within the specified time from turning ON the
power relay.
Thermistor trouble.
Heater lamp trouble.
PCU PWB trouble.
Thermostat trouble.
Connector, harness connection trouble.
Power unit trouble.
Interlock switch trouble.
level within the specified time from turning ON the
power relay.
Thermistor trouble.
Heater lamp trouble.
PCU PWB trouble.
Thermostat trouble.
Connector, harness connection trouble.
Power unit trouble.
Interlock switch trouble.
Check & Remedy
Replace the thermistor.
Replace the heater lamp.
Replace the PCU 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 PCU 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.
MX-4101N SELF DIAG AND TROUBLE CODE 7 – 19
H4-01
Fusing section low temperature
trouble (TH_LM)
trouble (TH_LM)
H4-04
Low temperature trouble (TH_EX)
H4-30
Thermistor input circuit trouble
(TH_UM)
(TH_UM)
H5-01
5 times continuous POD1 not-reach
jam
jam
H7-10
Recovery error from low fuser temp.
(TH_UM_AD2)
(TH_UM_AD2)
H7-11
Recovery error from low fuser temp.
(TH_LM)
(TH_LM)
Trouble content
Detail
PCU
Cause
The fusing temperature does not reach the specified
level within the specified time from turning ON the
power relay.
Thermistor trouble.
Heater lamp trouble.
PCU PWB trouble
Thermostat trouble.
Connector, harness connection trouble.
Power unit trouble.
Interlock switch trouble.
level within the specified time from turning ON the
power relay.
Thermistor trouble.
Heater lamp trouble.
PCU PWB trouble
Thermostat trouble.
Connector, harness connection trouble.
Power unit trouble.
Interlock switch trouble.
Check & Remedy
Replace the thermistor.
Replace the heater lamp.
Replace the PCU 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 PCU 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.
Trouble content
Detail
PCU
Cause
Thermistor trouble.
Heater lamp trouble.
PCU PWB trouble.
Thermostat trouble.
Power unit trouble.
Interlock switch trouble.
Heater lamp trouble.
PCU PWB trouble.
Thermostat trouble.
Power unit trouble.
Interlock switch trouble.
Check & Remedy
Use SIM5-2 to check the flashing operation of the
heater lamp.
Use SIM14 to cancel the trouble.
Replace the thermistor.
Replace the heater lamp.
Replace the PCU PWB.
Replace the power unit.
Replace the interlock switch.
heater lamp.
Use SIM14 to cancel the trouble.
Replace the thermistor.
Replace the heater lamp.
Replace the PCU PWB.
Replace the power unit.
Replace the interlock switch.
Trouble content
Detail
PCU
Cause
The values of TH_UM_AD1 and TH_UM_AD2 do not
exceed the specified value (50 counts in AD value)
within the specified time from turning ON the
HL_UM.
Thermistor trouble.
Heater lamp trouble.
PCU PWB trouble
Thermostat trouble.
Connector, harness connection trouble.
Power unit trouble.
Interlock switch trouble
exceed the specified value (50 counts in AD value)
within the specified time from turning ON the
HL_UM.
Thermistor trouble.
Heater lamp trouble.
PCU PWB trouble
Thermostat trouble.
Connector, harness connection trouble.
Power unit trouble.
Interlock switch trouble
Check & Remedy
Replace the thermistor.
Replace the heater lamp.
Replace the PCU 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 PCU 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.
Trouble content
Detail
PCU
Cause
A fusing jam is not canceled completely. (A jam
paper remains.)
POD1 sensor trouble.
Fusing unit installation trouble.
Connector, harness connection trouble.
PCU PWB trouble
paper remains.)
POD1 sensor trouble.
Fusing unit installation trouble.
Connector, harness connection trouble.
PCU 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 PCU 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 PCU PWB.
Use SIM14 to cancel the trouble.
Trouble content
Detail
PCU
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.
Thermistor trouble.
Heater lamp trouble.
PCU PWB trouble
Thermostat trouble.
Connector, harness connection trouble.
Power unit trouble.
Interlock switch trouble.
level within the specified time from stopping a job
due to fall in the fusing temperature.
Thermistor trouble.
Heater lamp trouble.
PCU PWB trouble
Thermostat trouble.
Connector, harness connection trouble.
Power unit trouble.
Interlock switch trouble.
Check & Remedy
Replace the thermistor.
Replace the heater lamp.
Replace the PCU 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 PCU 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.
Trouble content
Detail
PCU
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.
Thermistor trouble.
Heater lamp trouble.
PCU PWB trouble
Thermostat trouble.
Connector, harness connection trouble.
Power unit trouble.
Interlock switch trouble.
level within the specified time from stopping a job
due to fall in the fusing temperature.
Thermistor trouble.
Heater lamp trouble.
PCU PWB trouble
Thermostat trouble.
Connector, harness connection trouble.
Power unit trouble.
Interlock switch trouble.
Check & Remedy
Replace the thermistor.
Replace the heater lamp.
Replace the PCU 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 PCU 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-4101N SELF DIAG AND TROUBLE CODE 7 – 20
H7-14
Recovery error from low fuser temp.
(TH_EX)
(TH_EX)
L1-00
Scanner feed trouble
L3-00
Scanner return trouble
L4-02
Paper feed motor trouble
L4-03
Fusing motor trouble
L4-04
Developing motor trouble (BLACK)
L4-05
Developing motor trouble (COLOR)
Trouble content
Detail
PCU
Cause
The specified temperature is not reached within the
specified time from job stop due to a fall in the fusing
temperature.
Thermistor trouble.
Thermostat trouble.
Heater lamp trouble.
PCU PWB trouble.
Power unit trouble.
Interlock switch trouble.
Connection trouble of the connector and the
harness.
specified time from job stop due to a fall in the fusing
temperature.
Thermistor trouble.
Thermostat trouble.
Heater lamp trouble.
PCU PWB trouble.
Power unit trouble.
Interlock switch trouble.
Connection trouble of the connector and the
harness.
Check & Remedy
Replace the thermistor.
Replace the thermostat.
Replace the heater lamp.
Replace the PCU PWB.
Replace the power unit.
Replace the interlock switch.
Check connection of the connector and the harness.
Use SIM5-2 to check the flashing operation of the
heater lamp.
Replace the thermostat.
Replace the heater lamp.
Replace the PCU PWB.
Replace the power unit.
Replace the interlock switch.
Check connection of the connector and the harness.
Use SIM5-2 to check the flashing operation of the
heater lamp.
Trouble content
Detail
SCU
Cause
Scanner feed is not completed within the specified
time.
Scanner unit trouble.
SCU PWB trouble
Scanner control PWB trouble.
Harness and connector connection trouble.
Scanner home position sensor trouble.
Scanner motor trouble.
time.
Scanner unit trouble.
SCU PWB trouble
Scanner control PWB trouble.
Harness and connector connection trouble.
Scanner home position sensor trouble.
Scanner motor trouble.
Check & Remedy
Use SIM1-1 to check the scan operation.
Replace the scanner unit.
Replace the SCU PWB.
Check connection of the connectors and the
harness.
Replace the scanner home position sensor.
Replace the scanner motor.
Replace the scanner unit.
Replace the SCU PWB.
Check connection of the connectors and the
harness.
Replace the scanner home position sensor.
Replace the scanner motor.
Trouble content
Detail
SCU
Cause
Scanner return is not completed within the specified
time.
Scanner unit trouble.
SCU PWB trouble
Scanner control PWB trouble.
Harness and connector connection trouble.
Scanner home position sensor trouble.
Scanner motor trouble.
time.
Scanner unit trouble.
SCU PWB trouble
Scanner control PWB trouble.
Harness and connector connection trouble.
Scanner home position sensor trouble.
Scanner motor trouble.
Check & Remedy
Use SIM1-1 to check the scan operation.
Replace the scanner unit.
Replace the SCU PWB.
Check connection of the connectors and the
harness.
Replace the scanner home position sensor.
Replace the scanner motor.
Replace the scanner unit.
Replace the SCU PWB.
Check connection of the connectors and the
harness.
Replace the scanner home position sensor.
Replace the scanner motor.
Trouble content
Detail
PCU
Cause
The lock signal Is not detected within 1 sec when
turning ON the paper feed motor when warming up,
canceling a jam.
Paper feed motor trouble.
Harness and connector connection trouble.
PCU PWB trouble
turning ON the paper feed motor when warming up,
canceling a jam.
Paper feed motor trouble.
Harness and connector connection trouble.
PCU 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 connectors and the
harness.
Replace the PCU PWB.
motor.
Replace the paper feed motor.
Check connection of the connectors and the
harness.
Replace the PCU PWB.
Trouble content
Detail
PCU
Cause
The motor lock signal is detected during rotation of
the fusing motor.
Fusing motor trouble.
Connection trouble of the connector and the
harness.
PCU PWB trouble.
the fusing motor.
Fusing motor trouble.
Connection trouble of the connector and the
harness.
PCU PWB trouble.
Check & Remedy
Use SIM6-1 to check the operation of the fusing
motor.
Replace the Fusing motor.
Check connection of the connectors and the
harness.
Replace the PCU PWB.
motor.
Replace the Fusing motor.
Check connection of the connectors and the
harness.
Replace the PCU PWB.
Trouble content
Detail
PCU
Cause
The motor lock signal is detected during rotation of
the developing motor.
Developing motor trouble.
Harness and connector connection trouble.
PCU PWB trouble
Developing unit trouble.
the developing motor.
Developing motor trouble.
Harness and connector connection trouble.
PCU 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 PCU 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 PCU PWB.
Replace the developing motor.
Replace the developing unit.
Trouble content
Detail
PCU
Cause
The motor lock signal is detected during rotation of
the developing motor.
Developing motor trouble.
Harness and connector connection trouble.
PCU PWB trouble
Developing unit trouble.
the developing motor.
Developing motor trouble.
Harness and connector connection trouble.
PCU 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 PCU 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 PCU PWB.
Replace the developing motor.
Replace the developing unit.
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