Sharp MX-M850 (serv.man38) Service Manual ▷ View online
MX-M1100 SELF DIAG AND TROUBLE CODE 8 – 17
F1-64
No. 1 pickup motor trouble
F1-65
No. 2 pickup motor trouble
F1-66
No. 1 lift motor trouble
(finisher + saddle unit + inserter)
Lift motor 1 trouble (booklet maker)
(finisher + saddle unit + inserter)
Lift motor 1 trouble (booklet maker)
F1-67
No. 2 lift motor trouble
(finisher + saddle unit + inserter)
Lift motor 2 trouble (booklet maker)
(finisher + saddle unit + inserter)
Lift motor 2 trouble (booklet maker)
F1-70
Communication trouble between
peripheral devices
(Z-folding machine detection)
peripheral devices
(Z-folding machine detection)
F1-71
Varistor abnormality
F1-72
Z-folding machine EEPROM
abnormality
abnormality
F1-73
Separation sensor adjustment
abnormality
abnormality
F1-74
Pressure sensor adjustment
abnormality
abnormality
Detail
The paper feed roller drive motor abnormality in the
inserter upper side paper feed section
inserter upper side paper feed section
Section
PCU
Cause
Motor lock, control PWB trouble, home position sensor
breakdown, connection harness / connector connection
trouble.
breakdown, connection harness / connector connection
trouble.
Check &
Remedy
Remedy
Use Sim. 3-31 to check the operation of the No. 1 pick-
up motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
up motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
Detail
The paper feed roller drive motor abnormality in the
inserter lower side paper feed section
inserter lower side paper feed section
Section
PCU
Cause
Motor lock, control PWB trouble, home position sensor
breakdown, connection harness / connector connection
trouble.
breakdown, connection harness / connector connection
trouble.
Check &
Remedy
Remedy
Use Sim. 3-31 to check the operation of the No. 2 pick-
up motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
up motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
Detail
The tray lift-up drive motor abnormality in the inserter
upper side paper feed section
upper side paper feed section
Section
PCU
Cause
Motor lock, control PWB trouble, home position sensor
breakdown, connection harness/connector connection
trouble.
breakdown, connection harness/connector connection
trouble.
Check &
Remedy
Remedy
Use Sim. 3-31 to check the operation of the No. 1 lift
motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
Detail
The tray lift-up drive motor abnormality in the inserter
lower side paper feed section
lower side paper feed section
Section
PCU
Cause
Motor lock, control PWB trouble, home position sensor
breakdown, connection harness/connector connection
trouble.
breakdown, connection harness/connector connection
trouble.
Check &
Remedy
Remedy
Use Sim. 3-31 to check the operation of the No. 2 lift
motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
Detail
Communication abnormality between the units
connected to the lower stream of the Z-folding unit /
No response is made to a command send from the
Z-folding unit
connected to the lower stream of the Z-folding unit /
No response is made to a command send from the
Z-folding unit
Section
PCU
Cause
Communication line noises, control PWB trouble,
connection trouble, connection harness breakage.
connection trouble, connection harness breakage.
Check &
Remedy
Remedy
Turn OFF / ON the power. Check connection of the
connector with the lower stream machine of the Z-
folding machine. Replace the control PWB of the lower
stream machine of the inserter.
connector with the lower stream machine of the Z-
folding machine. Replace the control PWB of the lower
stream machine of the inserter.
Detail
Varistor abnormality is detected on the Z-folding unit
control PWB
control PWB
Section
PCU
Cause
A high voltage noise such as lighting surge has
occurred, or PWB trouble.
occurred, or PWB trouble.
Check &
Remedy
Remedy
Replace the PWB.
Detail
Data write error to the EEPROM on the Z-folding unit
Section
PCU
Cause
Control PWB trouble, garbles data due to line noise.
Check &
Remedy
Remedy
Use the simulation to rewrite the data and check again.
If the trouble occurs after recheck, replace the PWB.
If the trouble occurs after recheck, replace the PWB.
Detail
The sensor input value does not become the proper
level in the automatic adjustment of the separation
sensor.
level in the automatic adjustment of the separation
sensor.
Section
PCU
Cause
Trouble the sensor. Trouble the control PWB.
Check &
Remedy
Remedy
Replace the sensor. Replace the control PWB.
Detail
The sensor input value does not become the proper
level in the automatic adjustment of the pressure
sensor.
level in the automatic adjustment of the pressure
sensor.
Section
PCU
Cause
Trouble the sensor. Trouble the control PWB.
Check &
Remedy
Remedy
Replace the sensor. Replace the control PWB.
MX-M1100 SELF DIAG AND TROUBLE CODE 8 – 18
F1-75
Upper stopper motor trouble
F1-76
Lower stopper motor trouble
F1-77
Folding motor trouble
F1-83
Lead edge stopper motor trouble
F1-84
Movable fence motor trouble
F1-85
Return transport motor trouble
F1-86
Return drive motor trouble
(finisher + saddle unit + inserter)
Return collar oscillation motor trouble
(saddle finisher)
(finisher + saddle unit + inserter)
Return collar oscillation motor trouble
(saddle finisher)
F1-87
Shift jogger motor trouble
F1-88
Shift jogger retract motor trouble
F1-89
Shift motor trouble
Detail
Z-folding unit upper stopper drive motor abnormality
Section
PCU
Cause
Motor lock, control PWB trouble, home position sensor
breakdown, connection harness / connector connection
trouble.
breakdown, connection harness / connector connection
trouble.
Check &
Remedy
Remedy
Use Sim. 3-41 to check the operation of the upper
stopper motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
stopper motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
Detail
Z-folding machine lower stopper drive motor
abnormality
abnormality
Section
PCU
Cause
Motor lock, control PWB trouble, home position sensor
breakdown, connection harness / connector connection
trouble.
breakdown, connection harness / connector connection
trouble.
Check &
Remedy
Remedy
Use Sim. 3-41 to check the operation of the lower
stopper motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
stopper motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
Detail
Z-folding machine paper folding drive motor abnormality
Section
PCU
Cause
Motor lock, control PWB trouble, encoder sensor
trouble, connection harness / connector connection
trouble..
trouble, connection harness / connector connection
trouble..
Check &
Remedy
Remedy
Use Sim. 3-41 to check the operation of the folding
motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
Detail
The paper lead edge stopper drive motor abnormality in
the finisher compiler.
the finisher compiler.
Section
PCU
Cause
Motor lock, control PWB trouble, encoder sensor
trouble, connection harness/connector connection
trouble.
trouble, connection harness/connector connection
trouble.
Check &
Remedy
Remedy
Use Sim. 3-3 to check the operation of the lead edge
stopper motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
stopper motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
Detail
Movable fence motor abnormality in the finisher
compiler
compiler
Section
PCU
Cause
Motor lock, motor harness short / open, control PWB
trouble, home position sensor trouble, connection
harness / connector connection trouble.
trouble, home position sensor trouble, connection
harness / connector connection trouble.
Check &
Remedy
Remedy
Use Sim. 3-3 to check the operation of the movable
fence motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
fence motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
Detail
Return transport motor abnormality in the finisher
compiler
compiler
Section
PCU
Cause
Motor lock, motor harness short / open, control PWB
trouble, connection harness / connector connection
trouble.
trouble, connection harness / connector connection
trouble.
Check &
Remedy
Remedy
Use Sim. 3-3 to check the operation of the return
transport motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
transport motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
Detail
Return drive motor abnormality in the finisher compiler
Section
PCU
Cause
Motor lock, motor harness short/open, control PWB
trouble, home position sensor trouble, connection
harness / connector connection trouble.
trouble, home position sensor trouble, connection
harness / connector connection trouble.
Check &
Remedy
Remedy
Use Sim. 3-3 to check the operation of the return drive
motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
Detail
Finisher shift tray section jogger drive motor
abnormality
abnormality
Section
PCU
Cause
Motor lock, motor harness short / open, control PWB
trouble, home position sensor trouble, connection
harness/connector connection trouble.
trouble, home position sensor trouble, connection
harness/connector connection trouble.
Check &
Remedy
Remedy
Use Sim. 3-3 to check the operation of the shift jogger
motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
Detail
Abnormality of the drive motor which retracts the jogger
in the shift tray section of the finisher from the tray
in the shift tray section of the finisher from the tray
Section
PCU
Cause
Motor lock, motor harness short / open, control PWB
trouble, home position sensor trouble, connection
harness / connector connection trouble.
trouble, home position sensor trouble, connection
harness / connector connection trouble.
Check &
Remedy
Remedy
Use Sim. 3-3 to check the operation of the shift jogger
retracting motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
retracting motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
Detail
Abnormality of the shift unit drive motor in the shift tray
paper exit section of the finisher
paper exit section of the finisher
Section
PCU
Cause
Motor lock, motor harness short/open, control PWB
trouble, home position sensor trouble, connection
harness/connector connection trouble.
trouble, home position sensor trouble, connection
harness/connector connection trouble.
Check &
Remedy
Remedy
Use Sim. 3-3 to check the operation of the shift motor.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
Check connection from the control PWB to the motor.
Replace the control PWB and the sensor part.
MX-M1100 SELF DIAG AND TROUBLE CODE 8 – 19
F2-00
Toner control sensor open
F2-02
Toner supply abnormality
F2-04
An improper toner cartridge is
detected.
detected.
F2-05
Toner cartridge CRUM error
F2-06
CRUMID error
F2-31
Process control trouble (OPC drum
surface reflection rate abnormality)
surface reflection rate abnormality)
F2-33
Surface potential sensor abnormality
trouble
trouble
F2-39
Process thermistor breakdown
F2-47
Room temperature thermistor
breakdown
breakdown
Detail
Toner control sensor output open
Section
PCU
Cause
Connector and harness trouble.
Connector not connected.
Developer empty, or abnormally little developer.
Sensor abnormality.
Connector not connected.
Developer empty, or abnormally little developer.
Sensor abnormality.
Check &
Remedy
Remedy
Check connection of the harness of the toner control
sensor.
Check connection of the interface harness on the rear
side of the developer tank.
Check connection of the connector and the harness to
the main PWB.
Check for disconnection of the harness.
If the trouble is not canceled, replace the sensor, or
replace the developing unit.
sensor.
Check connection of the interface harness on the rear
side of the developer tank.
Check connection of the connector and the harness to
the main PWB.
Check for disconnection of the harness.
If the trouble is not canceled, replace the sensor, or
replace the developing unit.
Detail
Toner end though the remaining quantity is not 0%.
The count value of the toner cartridge motor rotation
sensor exceeds the level 3 times greater than the
specified level.
The count value of the toner cartridge motor rotation
sensor exceeds the level 3 times greater than the
specified level.
Section
PCU
Cause
Toner motor section connector harness trouble.
Toner motor and toner density sensor trouble.
Toner motor and toner density sensor trouble.
Check &
Remedy
Remedy
Check connection of the connector in the toner motor
section.
Check connection of the connector harness (TM) to the
main PWB.
Check the output of the toner density sensor (SIM 25-1).
Replace the toner cartridge (CRUM).
If the trouble still remains after replacement of the toner
cartridge (CRUM), check the developing unit.
section.
Check connection of the connector harness (TM) to the
main PWB.
Check the output of the toner density sensor (SIM 25-1).
Replace the toner cartridge (CRUM).
If the trouble still remains after replacement of the toner
cartridge (CRUM), check the developing unit.
Detail
Improper data are found in the CRUM content when
detection the normal CRUM of the cartridge
detection the normal CRUM of the cartridge
Section
PCU
Cause
An improper cartridge is inserted.
Toner cartridge trouble.
Toner cartridge trouble.
Check &
Remedy
Remedy
Replace the toner cartridge.
Detail
Read/write operation of the CRUM cannot be performed
Section
PCU
Cause
CRUM trouble.
Contact trouble or disconnection of the connector and
the harness between the PCU and the toner cartridge.
Control PWB (PCU) trouble.
Contact trouble or disconnection of the connector and
the harness between the PCU and the toner cartridge.
Control PWB (PCU) trouble.
Check &
Remedy
Remedy
Replace the toner cartridge.
Check the connector and the harness between the PCU
and the toner cartridge.
Replace the PCU PWB.
Check the connector and the harness between the PCU
and the toner cartridge.
Replace the PCU PWB.
Detail
Installed CRUMID trouble
Section
PCU
Cause
An improper cartridge is inserted.
Toner cartridge trouble.
Toner cartridge trouble.
Check &
Remedy
Remedy
Replace the toner cartridge.
Detail
Density sensor harness open or short, sensor detection
trouble
trouble
Section
PCU
Cause
Density sensor dirt, density sensor trouble.
Density sensor harness connection trouble.
PCU PWB Trouble. Drum surface state abnormality.
Drum charging state abnormality.
Density sensor harness connection trouble.
PCU PWB Trouble. Drum surface state abnormality.
Drum charging state abnormality.
Check &
Remedy
Remedy
Check connection of the harness and the connector of
the sensor.
Check the PCU PWB. Check for dirt on the sensor
section. Clean or replace as needed.
Check the drum surface condition. Use Sim. 44-2 to
check the operation. Execute DARK V0 of Sim. Sim. 44-
3 to check the operation.
the sensor.
Check the PCU PWB. Check for dirt on the sensor
section. Clean or replace as needed.
Check the drum surface condition. Use Sim. 44-2 to
check the operation. Execute DARK V0 of Sim. Sim. 44-
3 to check the operation.
Detail
Front surface potential sensor open or short, sensor
detection trouble
detection trouble
Section
PCU
Cause
Sensor dirt, sensor trouble.
Surface potential sensor harness connection trouble.
PCU PWB Trouble. Drum surface state abnormality.
Grid high voltage output trouble.
Drum charging abnormality due to dirt on the MC grid.
The drum life is reached.
Surface potential sensor harness connection trouble.
PCU PWB Trouble. Drum surface state abnormality.
Grid high voltage output trouble.
Drum charging abnormality due to dirt on the MC grid.
The drum life is reached.
Check &
Remedy
Remedy
Check connection of the harness and the connector of
the sensor.
Check the PCU PWB. Check for dirt on the MC grid.
Clean or replace as needed.
Check the drum surface condition. Use Sim. 22-1 to
check the drum life meter. If it is 100%, it means that the
drum life is reached, and maintenance must be
performed.
Use Sim. 44-3 to execute DARK V0 and check the
operation.
Check the grid high voltage output.
the sensor.
Check the PCU PWB. Check for dirt on the MC grid.
Clean or replace as needed.
Check the drum surface condition. Use Sim. 22-1 to
check the drum life meter. If it is 100%, it means that the
drum life is reached, and maintenance must be
performed.
Use Sim. 44-3 to execute DARK V0 and check the
operation.
Check the grid high voltage output.
Detail
Process thermistor open
Section
PCU
Cause
Process thermistor trouble.
Process thermistor harness connection trouble.
PCU PWB trouble.
Process thermistor harness connection trouble.
PCU PWB trouble.
Check &
Remedy
Remedy
Check connection of the harness and the connector in
the process thermistor.
Check the PCU PWB.
the process thermistor.
Check the PCU PWB.
Detail
Room temperature thermistor open or short
Section
PCU
Cause
Room temperature thermistor trouble, room
temperature thermistor harness connection trouble,
PCU PWB trouble.
temperature thermistor harness connection trouble,
PCU PWB trouble.
Check &
Remedy
Remedy
Check connection of the room temperature harness /
connector. Check the PCU PWB.
connector. Check the PCU PWB.
MX-M1100 SELF DIAG AND TROUBLE CODE 8 – 20
F2-58
Process humidity sensor breakdown
F2-59
Room humidity thermistor trouble
F3-12
Machine cassette 1 lift-up trouble
F3-22
Machine cassette 2 lift-up trouble
F3-32
Machine cassette 3 lift-up trouble
F3-42
Machine cassette 4 lift-up trouble
F4-38
38 (V) voltage trouble
F5-10
Lamp thermistor open detection
trouble (SCU detection)
trouble (SCU detection)
F5-12
Lamp thermistor abnormality
detection (SCU detection)
detection (SCU detection)
F6-00
Communication trouble between the
MFP and the FAX (MFP detection)
MFP and the FAX (MFP detection)
F6-01
FAX PWB EEPROM read / write error
Detail
Process humidity sensor open
Section
PCU
Cause
Process humidity sensor trouble.
Process humidity sensor harness connection trouble.
PCU PWB trouble.
Process humidity sensor harness connection trouble.
PCU PWB trouble.
Check &
Remedy
Remedy
Check connection of the harness and the connector of
the process humidity sensor.
Check the PCU PWB.
the process humidity sensor.
Check the PCU PWB.
Detail
Room temperature humidity sensor open
Section
PCU
Cause
Room temperature humidity sensor trouble, room
temperature humidity sensor harness connection
trouble, PCU PWB trouble.
temperature humidity sensor harness connection
trouble, PCU PWB trouble.
Check &
Remedy
Remedy
Check connection of the room temperature humidity
sensor harness/connector.
Check the PCU PWB.
sensor harness/connector.
Check the PCU PWB.
Detail
LUD1 is not turned ON within the specified time.
Section
PCU
Cause
LUD1 sensor trouble.
Cassette 1 lift-up motor trouble.
Harness connection trouble of PCU PWB, the lift-up
unit, and the paper feed unit.
Cassette 1 lift-up motor trouble.
Harness connection trouble of PCU PWB, the lift-up
unit, and the paper feed unit.
Check &
Remedy
Remedy
Check connection of the harness and the connector of
LUD1.
Check the lift-up unit.
LUD1.
Check the lift-up unit.
Detail
LUD2 is not turned on within the specified time.
Section
PCU
Cause
LUD2 sensor trouble.
Cassette 2 lift-up motor trouble.
Harness connection trouble of PCU PWB, the lift-up
unit, and the paper feed unit.
Cassette 2 lift-up motor trouble.
Harness connection trouble of PCU PWB, the lift-up
unit, and the paper feed unit.
Check &
Remedy
Remedy
Check the harness and the connector of LDU2.
Check the lift-up unit.
Check the lift-up unit.
Detail
LUD3 is not turned ON within the specified time.
Section
PCU
Cause
LUD3 sensor trouble.
Cassette 3 lift-up motor trouble.
Harness connection trouble of PCU PWB, the lift-up
motor, and the paper feed unit.
Cassette 3 lift-up motor trouble.
Harness connection trouble of PCU PWB, the lift-up
motor, and the paper feed unit.
Check &
Remedy
Remedy
Check the harness and the connector of LUD3.
Check the lift-up unit.
Check the lift-up unit.
Detail
LUD4 is not turned ON within the specified time.
Section
PCU
Cause
LUD4 sensor trouble.
Cassette 4 lift-up motor trouble.
Harness connection trouble of PCU PWB, the lift-up
motor, and the paper feed unit
Cassette 4 lift-up motor trouble.
Harness connection trouble of PCU PWB, the lift-up
motor, and the paper feed unit
Check &
Remedy
Remedy
Check LUD4 and the harness and the connector.
Check the lift-up unit.
Check the lift-up unit.
Detail
38V voltage fall or 38V disconnected.
Section
PCU
Cause
Connection failure or disconnection of the connector
and the harness.
PCU PWB trouble.
Power unit trouble, or blown fuse.
HL PWB trouble. (relay)
and the harness.
PCU PWB trouble.
Power unit trouble, or blown fuse.
HL PWB trouble. (relay)
Check &
Remedy
Remedy
Check the connector and the harness of the power line.
Check the power voltage of 38V in the power unit and
the PCU PWB.
Check for blown fuse in the power unit.
(Main power: F208)
Check the power voltage of 38V in the power unit and
the PCU PWB.
Check for blown fuse in the power unit.
(Main power: F208)
Detail
The thermistor open is detected.
Section
SCU
Cause
Thermistor abnormality, thermistor related harness and
circuit trouble.
circuit trouble.
Check &
Remedy
Remedy
Check the thermistor related circuits (Thermistor PWB,
SCNCNT PWB) and their harness and the connector.
SCNCNT PWB) and their harness and the connector.
Detail
An abnormal temperature is detected.
Section
SCU
Cause
Thermistor abnormality, thermistor related harness and
circuit trouble, fan filter clogging.
circuit trouble, fan filter clogging.
Check &
Remedy
Remedy
Check the thermistor related circuits (thermistor PWB,
SCNCNT PWB) and their harness and the connector.
SCNCNT PWB) and their harness and the connector.
Detail
Communication establishment error, framing error,
parity error, protocol error
parity error, protocol error
Section
ICU
Cause
FAX unit PWB connector connection trouble.
FAX unit PWB - ICU PWB harness trouble.
FAX unit PWB mother board connector pin breakage.
FAX unit ROM trouble / No ROM / Reverse insertion of
ROM / ROM pin breakage.
FAX unit PWB - ICU PWB harness trouble.
FAX unit PWB mother board connector pin breakage.
FAX unit ROM trouble / No ROM / Reverse insertion of
ROM / ROM pin breakage.
Check &
Remedy
Remedy
Check connection of the connector and the harness
between the FAX unit PWB and the ICU PWB.
Check grounding of the machine.
Check the ROM of the FAX unit PWB.
between the FAX unit PWB and the ICU PWB.
Check grounding of the machine.
Check the ROM of the FAX unit PWB.
Detail
Access error to EEPROM (read / write)
Section
ICU / FAX
Cause
EEPROM trouble.
FAX PWB EEPROM access circuit trouble.
FAX PWB EEPROM access circuit trouble.
Check &
Remedy
Remedy
Check that no trouble occurs after replacement of the
EEPROM.
Check that access can be normally made with Sim. 66-3
Memory check.
If the PWB is replaced, the adjustment is not required.
EEPROM.
Check that access can be normally made with Sim. 66-3
Memory check.
If the PWB is replaced, the adjustment is not required.
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