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MX-5500N MX-6200N MX-7000N (serv.man47)
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33
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322.94 KB
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Service Manual
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Device
Copying Equipment / Self diagnostics Trouble Codes
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mx-5500n-mx-6200n-mx-7000n-sm47.pdf
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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)
 
H7-11
Low temperature detection during the
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)
 
H7-14
Low temperature detection during the
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 
below the specified level in a print JOB, printing 
is interrupted temporarily and the temperature is 
reset.
Section
PCU
Case 1
Cause
Connector and harness connection trouble
Check and 
remedy
Check connection of the connector and the 
harness.
Case 2
Cause
Thermistor trouble, thermostat trouble, heater lamp 
trouble, PCU PWB trouble, AC power source 
trouble, interlock switch trouble
Check and 
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.
Trouble content
When the alarm is stopped, the set temperature is 
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.
Section
PCU
Case 1
Cause
Connector and harness connection trouble
Check and 
remedy
Check connection of the connector and the 
harness.
Case 2
Cause
Thermistor trouble, thermostat trouble, heater lamp 
trouble, PCU PWB trouble, AC power source 
trouble, interlock switch trouble
Check and 
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.
Trouble content
When the alarm is stopped, the set temperature is 
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.
Section
PCU
Case 1
Cause
Connector and harness connection trouble
Check and 
remedy
Check connection of the connector and the 
harness.
Case 2
Cause
Thermistor trouble, thermostat trouble, heater lamp 
trouble, PCU PWB trouble, AC power source 
trouble, interlock switch trouble
Check and 
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.
Trouble content
When the alarm is stopped, the set temperature is 
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.
Section
PCU
Case 1
Cause
Connector and harness connection trouble
Check and 
remedy
Check connection of the connector and the 
harness.
Case 2
Cause
Thermistor trouble, thermostat trouble, heater lamp 
trouble, PCU PWB trouble, AC power source 
trouble, interlock switch trouble
Check and 
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.
Trouble content
Mirror feed is not completed within the specified 
time.
Section
SCU
Case 1
Cause
Mirror unit trouble, mirror wire disengagement
Check and 
remedy
Use SIM1-1 to check the mirror operation.
Trouble content
Mirror return is not completed within the specified 
time.
Section
SCU
Case 1
Cause
Mirror unit trouble, mirror wire disengagement
Check and 
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.
Section
PCU
Case 1
Cause
Paper feed motor trouble, harness connection 
trouble between PCU PWB and paper feed motor, 
control circuit trouble
Check and 
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.
Trouble content
The motor lock signal is detected during rotation of 
the fusing motor.
Section
PCU
Case 1
Cause
Harness connection trouble between the PCU 
PWB and the fusing motor.
Check and 
remedy
Check the harness and the connector between the 
PCU PWB and the fusing motor.
Case 2
Cause
Fusing motor trouble, control circuit trouble
Check and 
remedy
Use SIM6-1 to check the operation of the fusing 
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
 
L4-08
Waste toner motor lock
 
L4-09
Resist motor lock
 
L4-12
Secondary transfer separation trouble
 
L4-13
Fusing external heating separation 
trouble
 
L4-30
Controller fan motor trouble
Trouble content
The motor lock signal is detected during rotation of 
the developing motor.
Section
PCU
Case 1
Cause
Harness connection trouble between the PCU 
PWB and the developing motor.
Check and 
remedy
Check the harness and the connector between the 
PCU PWB and the developing motor.
Case 2
Cause
Developing motor trouble, control circuit trouble
Check and 
remedy
Use SIM25-1 to check the operation of the 
developing motor.
Trouble content
The motor lock signal is detected during rotation of 
the developing motor.
Section
PCU
Case 1
Cause
Harness connection trouble between the PCU 
PWB and the developing motor.
Check and 
remedy
Check the harness and the connector between the 
PCU PWB and the developing motor.
Case 2
Cause
Developing motor trouble, control circuit trouble
Check and 
remedy
Use SIM25-1 to check the operation of the 
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.
Section
PCU
Case 1
Cause
Harness connection trouble between the PCU 
PWB and the separation position sensor
Check and 
remedy
Check the harness between the PCU PWB and the 
separation position sensor.
Case 2
Cause
The belt position sensor is not interrupted or it is 
always interrupted. Belt separation clutch 
operation trouble
Check and 
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.
Case 3
Cause
The primary transfer belt unit is not installed.
Check and 
remedy
Install the primary transfer belt unit.
Trouble content
The motor lock signal is detected during rotation of 
the waste toner motor.
Section
PCU
Case 1
Cause
Harness connection trouble between the PCU 
PWB and the waste toner motor.
Check and 
remedy
Check the harness and the connector between the 
PCU PWB and the waste toner motor.
Case 2
Cause
Waste toner motor trouble, control circuit trouble
Check and 
remedy
Use SIM6-1 to check the operation of the waste 
toner motor.
Trouble content
When the resist motor is rotation, the motor lock 
signal is detected.
Section
PCU
Case 1
Cause
Harness connection trouble between the PCU 
PWB and the resist motor
Check and 
remedy
Check the harness and the connector between the 
PCU PWB and the resist motor.
Case 2
Cause
Resist motor trouble, control circuit trouble
Check and 
remedy
Use SIM6-1 to check the operation of the resist 
motor.
Trouble content
When the secondary transfer unit is separated, 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
Check connection of the connector and the 
harness.
Case 2
Cause
Separation mechanism trouble, separation motor 
trouble, separation sensor trouble
Check and 
remedy
Check the separation mechanism. Replace the 
separation motor and the separation sensor.
Case 3
Cause
PCU PWB trouble
Check and 
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.
Section
PCU
Case 1
Cause
Connector and harness connection trouble
Check and 
remedy
Check connection of the connector and the 
harness.
Case 2
Cause
Separation mechanism trouble, separation motor 
trouble, separation sensor trouble
Check and 
remedy
Check the separation mechanism. Replace the 
separation motor and the separation sensor. 
Case 3
Cause
PCU PWB trouble
Check and 
remedy
Replace the PCU PWB.
Trouble content
1)
The motor lock signal is detected during 
rotation of the controller fan motor.
2)
The motor lock signal is detected during 
rotation of the HDD fan motor.
Section
MFP
Case 1
Cause
Fan motor trouble
Check and 
remedy
Use SIM6-2 to check the operation of the fan 
motor.
Case 2
Cause
Harness connection trouble between the mother 
PWB and the fan motor.
Check and 
remedy
Check the harness and the connector between the 
mother PWB and the fan motor.
Case 3
Cause
Control circuit trouble
Check and 
remedy
Replace the MFPcnt PWB.
Case 4
Cause
Mother PWB trouble.
Check and 
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.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and 
remedy
Check the harness and the connector between the 
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and 
remedy
Use SIM6-2 to check that the fan is actually 
rotating.
Trouble content
When the power cooling fan 1 is operated, the fan 
operation signal is not detected within the specified 
time.
Section
PCU
Case 1
Cause
Power cooling fan 1 connector disconnection
Check and 
remedy
Check the harness and the connector between the 
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble
Check and 
remedy
Use SIM6-2 to check that the fan is actually 
rotating.
Trouble content
When the LSU cooling fan is operated, the fan 
operation signal is not detected within the specified 
time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and 
remedy
Check the harness and the connector between the 
LSU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble
Check and 
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.
Trouble content
When the fusing exhaust fan is operated, the fan 
operation signal is not detected within the specified 
time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and 
remedy
Check the harness and the connector between the 
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and 
remedy
Use SIM6-2 to check that the fan is actually 
rotating.
Trouble content
When the fusing suction fan is operated, the fan 
operation signal is not detected within the specified 
time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and 
remedy
Check the harness and the connector between the 
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and 
remedy
Use SIM6-2 to check that the fan is actually 
rotating.
Trouble content
When the charger cooling fan is operated, the fan 
operation signal is not detected within the specified 
time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and 
remedy
Check the harness and the connector between the 
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and 
remedy
Use SIM6-2 to check that the fan is actually 
rotating.
Trouble content
When the machine ventilation fan center is 
operated, the fan operation signal is not detected 
within the specified time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and 
remedy
Check the harness and the connector between the 
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and 
remedy
Use SIM6-2 to check that the fan is actually 
rotating.
Trouble content
When the machine ventilation fan right is operated, 
the fan operation signal is not detected within the 
specified time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and 
remedy
Check the harness and the connector between the 
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and 
remedy
Use SIM6-2 to check that the fan is actually 
rotating.
Trouble content
When the ozone fan 1 is operated, the fan 
operation signal is not detected within the specified 
time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and 
remedy
Check the harness and the connector between the 
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and 
remedy
Use SIM6-2 to check that the fan is actually 
rotating.
Trouble content
When the ozone fan 2 is operated, the fan 
operation signal is not detected within the specified 
time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and 
remedy
Check the harness and the connector between the 
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and 
remedy
Use SIM6-2 to check that the fan is actually 
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
 
PC---
Personal counter not installed
 
U1-01
Battery trouble
 
U2-00
EEPROM read/write error 
(MFP detection)
Trouble content
When the ozone fan 3 is operated, the fan 
operation signal is not detected within the specified 
time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and 
remedy
Check the harness and the connector between the 
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and 
remedy
Use SIM6-2 to check that the fan is actually 
rotating.
Trouble content
When the paper exit cooling fan center is operated, 
the fan operation signal is not detected within the 
specified time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and 
remedy
Check the harness and the connector between the 
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and 
remedy
Use SIM6-2 to check that the fan is actually 
rotating.
Trouble content
When the power cooling fan 2 is operated, the fan 
operation signal is not detected within the specified 
time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and 
remedy
Check the harness and the connector between the 
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and 
remedy
Use SIM6-2 to check that the fan is actually 
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.
Section
PCU
Case 1
Cause
Disconnection of the LSU connector or the LSU 
inside harness, or breakage
Check and 
remedy
Check connection of the harness and the 
connector.
Case 2
Cause
Polygon motor trouble, LSU PWB trouble
Check and 
remedy
Use SIM61-1 to check the operation of the polygon 
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
Check connection of the harness and the 
connector.
Case 2
Cause
Power unit trouble
Check and 
remedy
Replace the power unit.
Case 3
Cause
PCU PWB trouble
Check and 
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.)
Section
PCU
Case 1
Cause
Harness trouble
Check and 
remedy
Check the harness and the connector connection.
Case 2
Cause
Power unit trouble
Check and 
remedy
Replace the power unit.
Case 3
Cause
PCU PWB trouble
Check and 
remedy
Replace the PCU PWB.
Trouble content
Communication establishment error/Framing/
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
Check and 
remedy
Check the connector connection between the 
mother board PWB and the MFPcnt PWB. Check 
grounding of the machine.
Case 2
Cause
Mother PWB trouble
Check and 
remedy
Replace the mother PWB.
Case 3
Cause
Mother PWB jumper error
Check and 
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
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
Check that the battery voltage is about 2.5V or 
above.
Trouble content
EEPROM device read/write error
Section
MFP
Case 1
Cause
EEPROM device trouble
Check and 
remedy
Replace the EEPROM device.
Case 2
Cause
EEPROM device contact failure
Check and 
remedy
Check that EEPROM device is properly inserted.
Case 3
Cause
Device access error due to electrical noises
Check and 
remedy
Replace the MFPcnt PWB.
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