
MX3114N TROUBLESHOOTING 7 – 24
L6-10
Polygon motor trouble
L8-01
Full wave signal detection error
L8-02
Full wave signal error
L8-20
Communication error of MFPC PWB/
LSU mother board
P1-00
PCI communication error
P1-01
PCI fan error
P1-02
Plasma generating device error
U1-01
Battery trouble
Trouble content
The polygon motor does not reach the specified RPM
within the specified time after starting rotation of the
polygon motor.
Detail
PCU
Cause
Polygon motor trouble.
LSU mother PWB trouble.
Connection trouble of the connector and the harness.
Check & Remedy
Use SIM61-1 to check the operation of the polygon
motor.
Check connection of the connector and the harness.
Replace the LSU.
Replace the LSU mother PWB.
Trouble content
The full wave signal is not detected.
Detail
PCU
Cause
PCU PWB trouble.
Power unit trouble.
Connection trouble of the connector and the harness.
Check & Remedy
Replace the PCU PWB.
Replace the power unit.
Check connection of the connector and the harness.
Trouble content
The full wave signal is not detected.
Detail
PCU
Cause
An abnormality in the full wave signal fre-
quency is detected
(The frequency is detected as 65Hz or above,
or 45Hz or less) PCU PWB trouble.
Power unit trouble
Connection trouble of the connector and the
harness
Power frequency wave form abnormality
Check & Remedy
Replace the PCU PWB
Replace the power unit
Check connection of the connector and the
harness
Check the power wave form
Trouble content
Detail
MFP
Cause
LSU mother board PWB - MFPC PWB connection
trouble.
MFPC PWB trouble.
LSU mother board trouble.
Check & Remedy
Check connection between the LSU mother board
PWB and the MFPC PWB.
Check the ground of the main unit.
Replace the MFPC PWB.
Replace the LSU mother board.
Trouble content
Detail
MFP
Cause
Communication error between the MFPC PWB and
the PCI.
Connection failure of connectors and harness
between the MFPC PWB and the PCI.
MFPC PWB trouble.
PCI control PWB trouble.
Check & Remedy
Check connection of the harness and connectors
between the MFPC PWB and the PCI.
Check the MFPC PWB, and replace if necessary.
(Refer to the necessary procedures after replacement
of the MFPC PWB in the Service Manual, and
perform the procedures.)
Check the PCI control PWB, and replace if
necessary.
Trouble content
Detail
MFP
Cause
The PCI fan operation signal is not detected.
PCI fan trouble.
PCI control PWB trouble.
Check & Remedy
Check connection of the connectors and harness
between the PCI fan and the PCI control PWB.
Check the PCI control PWB, and replace if
necessary.
Check the PCI fan, and replace if necessary.
Trouble content
Detail
MFP
Cause
Connection failure of connectors and harness
between the plasma generating device and the PCI
control PWB.
Plasma generating device trouble.
PCI control PWB trouble.
Check & Remedy
Check connection of the connectors and harness
between the plasma generating device and the PCI
control PWB.
Replace the plasma generating device.
Check the PCI control PWB, and replace if
necessary.
Trouble content
RTC backup battery voltage fall
Detail
MFP
Case 1
Cause
1)
Battery life
2)
Battery circuit abnormality
Check
and
Remedy
Check to confirm that the battery voltage is about
2.5V or above.
Replace the battery.