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F1-20
Finisher alignment operation trouble
R
Trouble content
Detail
PCU
Cause
Finisher paper alignment motor lock.
Motor speed abnormality.
Over-current to the motor.
Finisher control PWB trouble.
Home position sensor trouble.
Check & Remedy
Use SIM3-3 to check the operation of the paper
alignment motor R.
Use SIM3-2 to check the operation of the home
position sensor.
Replace the finisher control PWB.
Replace the paper alignment motor R.
Replace the home position sensor.
F1-29
Finisher cooling fan motor
abnormality
Trouble content
Finisher cooling fan motor abnormality
Detail
MFP
Cause
Motor lock
Motor harness short/open.
Finisher control PWB trouble.
Harness/connector connection trouble.
Check & Remedy
Use SIM3-3 to check the operation of the finisher
cooling fan (FCF).
Check connection from the finisher control PWB to
the motor.
Replace the finisher control PWB.
Replace the fan motor.
F1-37
Finisher data backup RAM error
Trouble content
Detail
PCU
Cause
Finisher control PWB trouble.
Malfunction due to noises
Check & Remedy
Replace the finisher control PWB.
Readjust the finisher. (Use SIM3-10, Finisher control
PWB DIP SW adjustment.)
F1-50
Main unit - Finisher combination error
Trouble content
Detail
PCU
Cause
The finisher which is not supported by the main unit
model is installed.
Finisher control PWB trouble.
Check & Remedy
Install a proper finisher.
Replace the finisher control PWB.
F1-95
Paper exit option configuration error
Trouble content
Detail
PCU
Cause
The paper exit option configuration is improper.
Check & Remedy
Install a proper option.
F2-39
Trouble content
Check & Remedy
F2-40
Trouble content
Check & Remedy
F2-58
Trouble content
Check & Remedy
F2-64
Trouble content
Check & Remedy
F2-70
Trouble content
Check & Remedy
MX-M316N TROUBLESHOOTING 7 – 11
Process thermistor trouble
Detail
PCU
Cause
Process thermistor trouble.
Process thermistor harness connection trouble.
PCU PWB trouble.
Replace the process thermistor.
Check connection of the process thermistor harness
and the connector.
Replace the PCU PWB.
Toner density sensor trouble
Detail
PCU
Cause
Toner density sensor output abnormality.
Sensor connector and harness connection trouble.
Developing unit trouble.
PCU PWB trouble.
Replace the toner density sensor.
Check connection of the sensor connector and the
harness.
Replace the developing unit.
Replace the PCU PWB.
Temperature/humidity sensor trouble
(HUD_M/TH_M)
Detail
PCU
Cause
Temperature/humidity sensor trouble.
Process humidity sensor harness and connector
connection trouble
PCU PWB trouble.
Replace the temperature/humidity sensor.
Check connection of the temperature/humidity sensor
harness and the connector.
Replace the PCU PWB.
Toner supply operation trouble
Detail
PCU
Cause
Toner motor trouble.
Toner density sensor trouble.
Connector/harness trouble.
PCU PWB trouble.
Toner cartridge trouble.
Developing unit trouble.
Replace the toner motor.
Replace the toner density sensor.
Connector and harness check.
Replace the PCU PWB.
Replace the toner cartridge.
Replace the developing unit.
Improper toner cartridge detection
Detail
PCU
Cause
An improper toner cartridge is inserted. (The main
unit detects a toner cartridge of a different
specification.)
Toner cartridge trouble.
PCU PWB trouble.
Replace the toner cartridge.
Replace the PCU PWB.
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