MX3114N TROUBLESHOOTING 7 – 27
U2-91 PCU PWB EEPROM check sum error
U6-00 PCU PWB - Paper feed desk (paper
feed tray 3, 4) communication trouble
U6-01 Paper feed tray 3 lift trouble
U6-02 Paper feed tray 4 lift trouble
U6-10 Desk paper feed unit paper transport
motor trouble
U6-50 Desk - Main unit combination trouble
U6-52 PCU PWB - Paper feed desk (paper
feed tray 2) communication trouble
U7-50 MFPC PWB - Vendor machine
communication error
U7-51 Vendor machine error
Trouble content
Detail PCU
Cause PCU PWB EEPROM trouble
PCU PWB trouble
EEPROM socket contact trouble
Check & Remedy Replace the PCU PWB EEPROM.
Replace the PCU PWB.
Check contact of the EEPROM socket.
Use SIM16 to cancel the trouble. (The check sum
error detection data are calculated again to reset the
proper check sum data.)
Trouble content
Detail PCU
Cause Connection trouble of the connector and the harness.
Paper feed desk control PWB trouble
PCU PWB trouble
Check & Remedy Check connection of the connector and the harness.
Replace the paper feed desk control PWB.
Replace the PCU PWB.
Trouble content D1ULD does not turn ON within the specified time
when lift-up operation.
Detail PCU
Cause D1ULD sensor trouble.
Desk control PWB trouble.
Lift unit trouble.
Connection trouble of the connector and the harness.
PCU PWB trouble.
Check & Remedy Replace the D1ULD sensor.
Replace the desk control PWB.
Replace the lift unit.
Check connection of the connector and the harness.
Replace the PCU PWB.
Trouble content D2ULD does not turn ON within the specified time
when lift-up operation.
Detail PCU
Cause D2ULD sensor trouble
Desk control PWB trouble
Lift unit trouble
Connection trouble of the connector and the harness.
PCU PWB trouble
Check & Remedy Replace the D2ULD sensor.
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 Desk paper feed motor trouble (motor lock, motor rpm
abnormality, over-current to the motor).
Desk control PWB trouble
Connection trouble of the connector and the harness.
Check & Remedy Use SIM4-3 to check the operation of the desk
transport motor.
Replace the desk control PWB.
Replace the desk paper feed motor.
Check connection of the connector and the harness.
Trouble content
Detail PCU
Cause Improper combination between the main unit and the
desk.
Desk control PWB trouble.
Check & Remedy Install a desk which is proper for the main unit mode.
Replace the desk control PWB.
Trouble content Paper feed tray 2 (desk unit) is not recognized.
Detail PCU
Cause Connection failure between the machine and paper
feed tray 2 (desk unit)
PCU PWB trouble.
Check & Remedy Check connection of the connector and the harness.
Replace the PCU PWB.
Trouble content Communication error between the MFP and the serial
vendor.
Detail MFP
Cause Improper setting of the vendor machine specifications
(SIM26-3).
Vendor machine trouble.
MFPC PWB trouble.
Connector, harness connection trouble.
Strong external noises.
Check & Remedy Cancel the error by turning OFF/ON the power.
Check the connector and the harness in the
communication line.
Change the specifications of the vendor machine
(SIM26-3).
Replace the MFPC PWB.
Trouble content
Detail MFP (Notification of a trouble from the serial vendor)
Cause Serial vendor machine trouble.
Connector, harness connection trouble.
Check & Remedy Err.XX is displayed on the operation panel of the
vendor. (XX is the detail code.)
Repair the vendor machine referring to the detail code.
Check the connector and the harness in the
communication line.
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