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MX-4101N SELF DIAG AND TROUBLE CODE 7 – 25
U5-16
Document feed unit fan trouble
U5-30
Document feed unit tray lift up trouble
U5-31
Document feed unit tray lift down
trouble
trouble
U5-40
Document feed unit installation
trouble
trouble
U6-00
Communication error of PCU/
Desk paper feed unit
Desk paper feed unit
U6-01
Desk paper feed tray 1 lift trouble
U6-02
Desk paper feed tray 2 lift trouble
Trouble content
Detail
SCU
Cause
When the fan is operated, the fan operation signal is
not detected within the specified time.
Fan motor trouble.
Connector, harness connection trouble.
DSPF PWB trouble.
not detected within the specified time.
Fan motor trouble.
Connector, harness connection trouble.
DSPF PWB trouble.
Check & Remedy
Use SIM2-3 to check that the fan is rotating.
Replace the fan motor.
Check connection of the connector and the harness.
Replace the DSPF PWB.
Replace the fan motor.
Check connection of the connector and the harness.
Replace the DSPF PWB.
Trouble content
Detail
SCU
Cause
When STUD is not turned ON 5 times continuously
within the specified time.
STUD/STLD sensor trouble.
Connection trouble of the connector and the
harness.
Replace the DSPF PWB.
within the specified time.
STUD/STLD sensor trouble.
Connection trouble of the connector and the
harness.
Replace the DSPF PWB.
Check & Remedy
Replace the STUD/STLD sensor.
Check connection of the connector and the harness.
Replace the DSPF PWB.
Check connection of the connector and the harness.
Replace the DSPF PWB.
Trouble content
Detail
SCU
Cause
STLD does not turn OFF within the specified time.
STUD/STLD sensor trouble.
Connection trouble of the connector and the
harness.
Replace the DSPF PWB.
STUD/STLD sensor trouble.
Connection trouble of the connector and the
harness.
Replace the DSPF PWB.
Check & Remedy
Replace the STUD/STLD sensor.
Check connection of the connector and the harness.
Replace the DSPF PWB.
Check connection of the connector and the harness.
Replace the DSPF PWB.
Trouble content
Detail
SCU
Cause
When two or more document feed units are
detected.
Connection trouble of the connector and the
harness.
Document feeder trouble.
detected.
Connection trouble of the connector and the
harness.
Document feeder trouble.
Check & Remedy
Check connection of the connector and the harness.
Trouble content
Detail
PCU
Cause
Error when testing the communication line after
turning ON the power or canceling the simulation.
Connector, harness connection trouble.
Desk control PWB trouble.
PCU PWB trouble
Strong external noises.
turning ON the power or canceling the simulation.
Connector, harness connection trouble.
Desk control PWB trouble.
PCU PWB trouble
Strong external noises.
Check & Remedy
Turn OFF/ON the power to cancel.
Check the connector and the harness in the
communication line.
Replace the desk control PWB.
Replace the PCU PWB.
Check the connector and the harness in the
communication line.
Replace the desk control PWB.
Replace the PCU PWB.
Trouble content
Detail
PCU
Cause
DLUD1 does not turn ON within the specified time
when lift-up operation.
DLUD1 sensor trouble.
Desk control PWB trouble.
Lift unit trouble.
Connection trouble of the connector and the
harness.
PCU PWB trouble
when lift-up operation.
DLUD1 sensor trouble.
Desk control PWB trouble.
Lift unit trouble.
Connection trouble of the connector and the
harness.
PCU PWB trouble
Check & Remedy
Replace the DLDU1 sensor.
Replace the desk control PWB.
Replace the lift unit.
Check connection of the connector and the harness.
Replace the PCU PWB.
Replace the desk control PWB.
Replace the lift unit.
Check connection of the connector and the harness.
Replace the PCU PWB.
Trouble content
Detail
PCU
Cause
DLUD2 does not turn ON within the specified time
when lift-up operation.
DLUD2 sensor trouble.
Desk control PWB trouble.
Lift unit trouble.
Connection trouble of the connector and the
harness.
PCU PWB trouble
when lift-up operation.
DLUD2 sensor trouble.
Desk control PWB trouble.
Lift unit trouble.
Connection trouble of the connector and the
harness.
PCU PWB trouble
Check & Remedy
Replace the DLDU2 sensor.
Replace the desk control PWB.
Replace the lift unit.
Check connection of the connector and the harness.
Replace the PCU PWB.
Replace the desk control PWB.
Replace the lift unit.
Check connection of the connector and the harness.
Replace the PCU PWB.
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