Sharp MX-5500N / MX-6200N / MX-7000N (serv.man47) Service Manual ▷ View online
MX-7000N SELF DIAG AND TROUBLE CODE 8 – 26
H7-10
Low temperature detection during the
temperature control reset operation
after stopping the alarm in a JOB
(HL_UM)
temperature control reset operation
after stopping the alarm in a JOB
(HL_UM)
H7-11
Low temperature detection during the
temperature control reset operation
after stopping the alarm in a JOB
(HL_LM)
temperature control reset operation
after stopping the alarm in a JOB
(HL_LM)
H7-12
Low temperature detection during the
temperature control reset operation
after stopping the alarm in a JOB
(HL_US)
temperature control reset operation
after stopping the alarm in a JOB
(HL_US)
H7-14
Low temperature detection during the
temperature control reset operation
after stopping the alarm in a JOB
(HL_EX1)
temperature control reset operation
after stopping the alarm in a JOB
(HL_EX1)
L1-00
Mirror feed trouble
L3-00
Mirror return trouble
L4-02
Paper feed motor lock trouble
L4-03
Fusing motor lock trouble
Trouble content
When the alarm is stopped, the set temperature is
not reached within the specified time.
* Alarm stop: When the fusing temperature falls
not reached within the specified time.
* Alarm stop: When the fusing temperature falls
below the specified level in a print JOB, printing
is interrupted temporarily and the temperature is
reset.
is interrupted temporarily and the temperature is
reset.
Section
PCU
Case 1
Cause
Connector and harness connection trouble
Check and
remedy
remedy
Check connection of the connector and the
harness.
harness.
Case 2
Cause
Thermistor trouble, thermostat trouble, heater lamp
trouble, PCU PWB trouble, AC power source
trouble, interlock switch trouble
trouble, PCU PWB trouble, AC power source
trouble, interlock switch trouble
Check and
remedy
remedy
Use SIM 5-2 to check lighting of the heater lamp.
Check conduction of the thermostat. Replace the
heater lamp, the PCU PWB, and the AC PWB.
Check conduction of the thermostat. Replace the
heater lamp, the PCU PWB, and the AC PWB.
Trouble content
When the alarm is stopped, the set temperature is
not reached within the specified time.
* Alarm stop: When the fusing temperature falls
not reached within the specified time.
* Alarm stop: When the fusing temperature falls
below the specified level in a print JOB, printing
is interrupted temporarily and the temperature is
reset.
is interrupted temporarily and the temperature is
reset.
Section
PCU
Case 1
Cause
Connector and harness connection trouble
Check and
remedy
remedy
Check connection of the connector and the
harness.
harness.
Case 2
Cause
Thermistor trouble, thermostat trouble, heater lamp
trouble, PCU PWB trouble, AC power source
trouble, interlock switch trouble
trouble, PCU PWB trouble, AC power source
trouble, interlock switch trouble
Check and
remedy
remedy
Use SIM 5-2 to check lighting of the heater lamp.
Check conduction of the thermostat. Replace the
heater lamp, the PCU PWB, and the AC PWB.
Check conduction of the thermostat. Replace the
heater lamp, the PCU PWB, and the AC PWB.
Trouble content
When the alarm is stopped, the set temperature is
not reached within the specified time.
* Alarm stop: When the fusing temperature falls
not reached within the specified time.
* Alarm stop: When the fusing temperature falls
below the specified level in a print JOB, printing
is interrupted temporarily and the temperature is
reset.
is interrupted temporarily and the temperature is
reset.
Section
PCU
Case 1
Cause
Connector and harness connection trouble
Check and
remedy
remedy
Check connection of the connector and the
harness.
harness.
Case 2
Cause
Thermistor trouble, thermostat trouble, heater lamp
trouble, PCU PWB trouble, AC power source
trouble, interlock switch trouble
trouble, PCU PWB trouble, AC power source
trouble, interlock switch trouble
Check and
remedy
remedy
Use SIM 5-2 to check lighting of the heater lamp.
Check conduction of the thermostat. Replace the
heater lamp, the PCU PWB, and the AC PWB.
Check conduction of the thermostat. Replace the
heater lamp, the PCU PWB, and the AC PWB.
Trouble content
When the alarm is stopped, the set temperature is
not reached within the specified time.
* Alarm stop: When the fusing temperature falls
not reached within the specified time.
* Alarm stop: When the fusing temperature falls
below the specified level in a print JOB, printing
is interrupted temporarily and the temperature is
reset.
is interrupted temporarily and the temperature is
reset.
Section
PCU
Case 1
Cause
Connector and harness connection trouble
Check and
remedy
remedy
Check connection of the connector and the
harness.
harness.
Case 2
Cause
Thermistor trouble, thermostat trouble, heater lamp
trouble, PCU PWB trouble, AC power source
trouble, interlock switch trouble
trouble, PCU PWB trouble, AC power source
trouble, interlock switch trouble
Check and
remedy
remedy
Use SIM 5-2 to check lighting of the heater lamp.
Check conduction of the thermostat. Replace the
heater lamp, the PCU PWB, and the AC PWB.
Check conduction of the thermostat. Replace the
heater lamp, the PCU PWB, and the AC PWB.
Trouble content
Mirror feed is not completed within the specified
time.
time.
Section
SCU
Case 1
Cause
Mirror unit trouble, mirror wire disengagement
Check and
remedy
remedy
Use SIM1-1 to check the mirror operation.
Trouble content
Mirror return is not completed within the specified
time.
time.
Section
SCU
Case 1
Cause
Mirror unit trouble, mirror wire disengagement
Check and
remedy
remedy
Use SIM1-1 to check the mirror operation.
Trouble content
When the paper feed motor is rotated in warming
up or in canceling a jam and the lock signal is not
detected within 1sec.
up or in canceling a jam and the lock signal is not
detected within 1sec.
Section
PCU
Case 1
Cause
Paper feed motor trouble, harness connection
trouble between PCU PWB and paper feed motor,
control circuit trouble
trouble between PCU PWB and paper feed motor,
control circuit trouble
Check and
remedy
remedy
Use SIM6-1 to check the paper feed motor
operation. Check the harness and the connector
between the PCU PWB and the paper feed motor.
operation. Check the harness and the connector
between the PCU PWB and the paper feed motor.
Trouble content
The motor lock signal is detected during rotation of
the fusing motor.
the fusing motor.
Section
PCU
Case 1
Cause
Harness connection trouble between the PCU
PWB and the fusing motor.
PWB and the fusing motor.
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the fusing motor.
PCU PWB and the fusing motor.
Case 2
Cause
Fusing motor trouble, control circuit trouble
Check and
remedy
remedy
Use SIM6-1 to check the operation of the fusing
motor.
motor.
MX-7000N SELF DIAG AND TROUBLE CODE 8 – 27
L4-04
Developing motor trouble (BK)
L4-05
Developing motor trouble (CL)
L4-06
Transfer belt separation position
sensor trouble
sensor trouble
L4-08
Waste toner motor lock
L4-09
Resist motor lock
L4-12
Secondary transfer separation trouble
L4-13
Fusing external heating separation
trouble
trouble
L4-30
Controller fan motor trouble
Trouble content
The motor lock signal is detected during rotation of
the developing motor.
the developing motor.
Section
PCU
Case 1
Cause
Harness connection trouble between the PCU
PWB and the developing motor.
PWB and the developing motor.
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the developing motor.
PCU PWB and the developing motor.
Case 2
Cause
Developing motor trouble, control circuit trouble
Check and
remedy
remedy
Use SIM25-1 to check the operation of the
developing motor.
developing motor.
Trouble content
The motor lock signal is detected during rotation of
the developing motor.
the developing motor.
Section
PCU
Case 1
Cause
Harness connection trouble between the PCU
PWB and the developing motor.
PWB and the developing motor.
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the developing motor.
PCU PWB and the developing motor.
Case 2
Cause
Developing motor trouble, control circuit trouble
Check and
remedy
remedy
Use SIM25-1 to check the operation of the
developing motor.
developing motor.
Trouble content
When separating the primary transfer belt unit,
change in the separation position sensor
characteristics is not detected within the specified
time.
change in the separation position sensor
characteristics is not detected within the specified
time.
Section
PCU
Case 1
Cause
Harness connection trouble between the PCU
PWB and the separation position sensor
PWB and the separation position sensor
Check and
remedy
remedy
Check the harness between the PCU PWB and the
separation position sensor.
separation position sensor.
Case 2
Cause
The belt position sensor is not interrupted or it is
always interrupted. Belt separation clutch
operation trouble
always interrupted. Belt separation clutch
operation trouble
Check and
remedy
remedy
Use SIM6-3 to check the belt separation operation.
Check to insure that the sensor is interrupted from
lighting when the belt is separated.
Check to insure that the sensor is interrupted from
lighting when the belt is separated.
Case 3
Cause
The primary transfer belt unit is not installed.
Check and
remedy
remedy
Install the primary transfer belt unit.
Trouble content
The motor lock signal is detected during rotation of
the waste toner motor.
the waste toner motor.
Section
PCU
Case 1
Cause
Harness connection trouble between the PCU
PWB and the waste toner motor.
PWB and the waste toner motor.
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the waste toner motor.
PCU PWB and the waste toner motor.
Case 2
Cause
Waste toner motor trouble, control circuit trouble
Check and
remedy
remedy
Use SIM6-1 to check the operation of the waste
toner motor.
toner motor.
Trouble content
When the resist motor is rotation, the motor lock
signal is detected.
signal is detected.
Section
PCU
Case 1
Cause
Harness connection trouble between the PCU
PWB and the resist motor
PWB and the resist motor
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the resist motor.
PCU PWB and the resist motor.
Case 2
Cause
Resist motor trouble, control circuit trouble
Check and
remedy
remedy
Use SIM6-1 to check the operation of the resist
motor.
motor.
Trouble content
When the secondary transfer unit is separated, the
separation sensor status change is not detected
within the specified time.
separation sensor status change is not detected
within the specified time.
Section
PCU
Case 1
Cause
Connector and harness connection trouble
Check and
remedy
remedy
Check connection of the connector and the
harness.
harness.
Case 2
Cause
Separation mechanism trouble, separation motor
trouble, separation sensor trouble
trouble, separation sensor trouble
Check and
remedy
remedy
Check the separation mechanism. Replace the
separation motor and the separation sensor.
separation motor and the separation sensor.
Case 3
Cause
PCU PWB trouble
Check and
remedy
remedy
Replace the PCU PWB.
Trouble content
When the fusing external heating unit is separated,
the separation sensor status change is not
detected within the specified time.
the separation sensor status change is not
detected within the specified time.
Section
PCU
Case 1
Cause
Connector and harness connection trouble
Check and
remedy
remedy
Check connection of the connector and the
harness.
harness.
Case 2
Cause
Separation mechanism trouble, separation motor
trouble, separation sensor trouble
trouble, separation sensor trouble
Check and
remedy
remedy
Check the separation mechanism. Replace the
separation motor and the separation sensor.
separation motor and the separation sensor.
Case 3
Cause
PCU PWB trouble
Check and
remedy
remedy
Replace the PCU PWB.
Trouble content
1)
The motor lock signal is detected during
rotation of the controller fan motor.
rotation of the controller fan motor.
2)
The motor lock signal is detected during
rotation of the HDD fan motor.
rotation of the HDD fan motor.
Section
MFP
Case 1
Cause
Fan motor trouble
Check and
remedy
remedy
Use SIM6-2 to check the operation of the fan
motor.
motor.
Case 2
Cause
Harness connection trouble between the mother
PWB and the fan motor.
PWB and the fan motor.
Check and
remedy
remedy
Check the harness and the connector between the
mother PWB and the fan motor.
mother PWB and the fan motor.
Case 3
Cause
Control circuit trouble
Check and
remedy
remedy
Replace the MFPcnt PWB.
Case 4
Cause
Mother PWB trouble.
Check and
remedy
remedy
Replace the mother PWB.
MX-7000N SELF DIAG AND TROUBLE CODE 8 – 28
L4-31
Paper exit cooling fan F lock
L4-32
Power cooling fan 1 lock
L4-34
LSU cooling fan trouble
L4-35
Fusing exhaust fan lock
L4-36
Fusing suction fan lock
L4-37
Charger cooling fan lock
L4-38
Machine ventilation fan center lock
L4-39
Machine ventilation fan right lock
L4-40
Ozone fan 1 lock
L4-41
Ozone fan 2 lock
Trouble content
When the paper exit cooling fan F is operated, the
fan operation signal is not detected within the
specified time.
fan operation signal is not detected within the
specified time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the fan.
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and
remedy
remedy
Use SIM6-2 to check that the fan is actually
rotating.
rotating.
Trouble content
When the power cooling fan 1 is operated, the fan
operation signal is not detected within the specified
time.
operation signal is not detected within the specified
time.
Section
PCU
Case 1
Cause
Power cooling fan 1 connector disconnection
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the fan.
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble
Check and
remedy
remedy
Use SIM6-2 to check that the fan is actually
rotating.
rotating.
Trouble content
When the LSU cooling fan is operated, the fan
operation signal is not detected within the specified
time.
operation signal is not detected within the specified
time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and
remedy
remedy
Check the harness and the connector between the
LSU PWB and the fan.
LSU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble
Check and
remedy
remedy
Use SIM6-2 to check that the fan is actually
rotating.
If the trouble is not canceled, replace the LSU fan
and the LSU cnt PWB.
rotating.
If the trouble is not canceled, replace the LSU fan
and the LSU cnt PWB.
Trouble content
When the fusing exhaust fan is operated, the fan
operation signal is not detected within the specified
time.
operation signal is not detected within the specified
time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the fan.
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and
remedy
remedy
Use SIM6-2 to check that the fan is actually
rotating.
rotating.
Trouble content
When the fusing suction fan is operated, the fan
operation signal is not detected within the specified
time.
operation signal is not detected within the specified
time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the fan.
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and
remedy
remedy
Use SIM6-2 to check that the fan is actually
rotating.
rotating.
Trouble content
When the charger cooling fan is operated, the fan
operation signal is not detected within the specified
time.
operation signal is not detected within the specified
time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the fan.
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and
remedy
remedy
Use SIM6-2 to check that the fan is actually
rotating.
rotating.
Trouble content
When the machine ventilation fan center is
operated, the fan operation signal is not detected
within the specified time.
operated, the fan operation signal is not detected
within the specified time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the fan.
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and
remedy
remedy
Use SIM6-2 to check that the fan is actually
rotating.
rotating.
Trouble content
When the machine ventilation fan right is operated,
the fan operation signal is not detected within the
specified time.
the fan operation signal is not detected within the
specified time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the fan.
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and
remedy
remedy
Use SIM6-2 to check that the fan is actually
rotating.
rotating.
Trouble content
When the ozone fan 1 is operated, the fan
operation signal is not detected within the specified
time.
operation signal is not detected within the specified
time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the fan.
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and
remedy
remedy
Use SIM6-2 to check that the fan is actually
rotating.
rotating.
Trouble content
When the ozone fan 2 is operated, the fan
operation signal is not detected within the specified
time.
operation signal is not detected within the specified
time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the fan.
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and
remedy
remedy
Use SIM6-2 to check that the fan is actually
rotating.
rotating.
MX-7000N SELF DIAG AND TROUBLE CODE 8 – 29
L4-42
Ozone fan 3 lock
L4-43
Paper exit cooling fan center lock
L4-44
Power cooling fan 2 lock
L6-10
Polygon motor lock detection
L8-01
No full wave signal
L8-02
Full wave signal width abnormality
L8-20
Power controller communication
trouble
trouble
PC---
Personal counter not installed
U1-01
Battery trouble
U2-00
EEPROM read/write error
(MFP detection)
(MFP detection)
Trouble content
When the ozone fan 3 is operated, the fan
operation signal is not detected within the specified
time.
operation signal is not detected within the specified
time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the fan.
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and
remedy
remedy
Use SIM6-2 to check that the fan is actually
rotating.
rotating.
Trouble content
When the paper exit cooling fan center is operated,
the fan operation signal is not detected within the
specified time.
the fan operation signal is not detected within the
specified time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the fan.
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and
remedy
remedy
Use SIM6-2 to check that the fan is actually
rotating.
rotating.
Trouble content
When the power cooling fan 2 is operated, the fan
operation signal is not detected within the specified
time.
operation signal is not detected within the specified
time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the fan.
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and
remedy
remedy
Use SIM6-2 to check that the fan is actually
rotating.
rotating.
Trouble content
It is judged that the LSU polygon motor lock signal
is not outputted, and the lock signal is checked
after 15 sec from starting rotation of the polygon
motor and it is judged that the polygon motor does
not rotate properly.
is not outputted, and the lock signal is checked
after 15 sec from starting rotation of the polygon
motor and it is judged that the polygon motor does
not rotate properly.
Section
PCU
Case 1
Cause
Disconnection of the LSU connector or the LSU
inside harness, or breakage
inside harness, or breakage
Check and
remedy
remedy
Check connection of the harness and the
connector.
connector.
Case 2
Cause
Polygon motor trouble, LSU PWB trouble
Check and
remedy
remedy
Use SIM61-1 to check the operation of the polygon
motor.
Replace the LSUcnt PWB. Replace the LSU.
motor.
Replace the LSUcnt PWB. Replace the LSU.
Trouble content
No full wave signal is detected.
Section
PCU
Case 1
Cause
Harness trouble
Check and
remedy
remedy
Check connection of the harness and the
connector.
connector.
Case 2
Cause
Power unit trouble
Check and
remedy
remedy
Replace the power unit.
Case 3
Cause
PCU PWB trouble
Check and
remedy
remedy
Replace the PCU PWB.
Trouble content
The full wave signal is judged as frequency
abnormality. (The detection frequency is judged as
65Hz or above or 45Hz or less.)
abnormality. (The detection frequency is judged as
65Hz or above or 45Hz or less.)
Section
PCU
Case 1
Cause
Harness trouble
Check and
remedy
remedy
Check the harness and the connector connection.
Case 2
Cause
Power unit trouble
Check and
remedy
remedy
Replace the power unit.
Case 3
Cause
PCU PWB trouble
Check and
remedy
remedy
Replace the PCU PWB.
Trouble content
Communication establishment error/Framing/
Parity/Protocol error
Parity/Protocol error
Section
MFP
Case 1
Cause
Connector connection trouble between the mother
board PWB and the MFPcnt PWB.
MFPcnt PWB mother board connector pin
breakage
board PWB and the MFPcnt PWB.
MFPcnt PWB mother board connector pin
breakage
Check and
remedy
remedy
Check the connector connection between the
mother board PWB and the MFPcnt PWB. Check
grounding of the machine.
mother board PWB and the MFPcnt PWB. Check
grounding of the machine.
Case 2
Cause
Mother PWB trouble
Check and
remedy
remedy
Replace the mother PWB.
Case 3
Cause
Mother PWB jumper error
Check and
remedy
remedy
Set the mother PWB jumper to the Default side.
Trouble content
The personal counter is not installed.
Section
MFP
Case 1
Cause
The personal counter is not installed.
Check and
remedy
remedy
Install the personal counter.
Trouble content
Backup SRAM battery voltage fall
Section
MFP
Case 1
Cause
1)
Battery life
2)
Battery circuit abnormality
Check and
remedy
remedy
Check that the battery voltage is about 2.5V or
above.
above.
Trouble content
EEPROM device read/write error
Section
MFP
Case 1
Cause
EEPROM device trouble
Check and
remedy
remedy
Replace the EEPROM device.
Case 2
Cause
EEPROM device contact failure
Check and
remedy
remedy
Check that EEPROM device is properly inserted.
Case 3
Cause
Device access error due to electrical noises
Check and
remedy
remedy
Replace the MFPcnt PWB.
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