Code: H7-11
Description:
Recovery error from low fuser temp. (TH_LM)
The fusing temperature does not reach the specified level within the specified time from stopping a job due to fall in the fusing temperature.
Causes:
Thermistor trouble. Heater lamp trouble. PCU PWB trouble. Thermostat trouble. Connector, harness connection trouble. HL control PWB trouble. Power unit trouble.
Remedy:
Replace the thermistor. Replace the heater lamp. Replace the PCU PWB. Replace the thermostat. Check connection of the connector and the harness. Replace the HL control PWB. Replace the power unit. Use SIM5-2 to check the flashing operation of the heater lamp.
Code: L1-00
Description:
Scanner feed trouble
Scanner feed is not completed within the specified time.
Causes:
Scanner unit trouble. SCU PWB trouble. Scanner control PWB trouble. Harness and connector connection trouble. Scanner home position sensor trouble. Scanner motor trouble.
Remedy:
Use SIM1-1 to check the scan operation. Replace the scanner unit. Replace the SCU PWB. Check connection of the connectors and the harness. Replace the scanner home position sensor. Replace the scanner motor.

Code: L3-00
Description:
Scanner return trouble
Scanner return is not completed within the specified time.
Causes:
Scanner unit trouble SCU PWB trouble Scanner control PWB trouble Harness and connector connection trouble Scanner home position sensor trouble Scanner motor trouble
Remedy:
Use SIM1-1 to check the scan operation. Replace the scanner unit. Replace the SCU PWB. Check connection of the connectors and the harness. Replace the scanner home position sensor. Replace the scanner motor.
Code: L4-02
Description:
Paper feed motor trouble
A lock signal is not detected within the specified time in ON operation of the paper feed motor after warming-up or canceling a jam.
Causes:
Paper feed motor trouble Paper feed motor harness and connector connection trouble PCU PWB trouble
Remedy:
Use SIM6-1 to check the operation of the paper feed motor. Replace the paper feed motor. Check connection of the paper feed motor harness and the connector. Replace the PCU PWB.
Code: L4-03
Description:
Fusing motor trouble
The motor lock signal is detected during rotation of the fusing motor.
Causes:
Fusing motor trouble Fusing motor harness and connector connection trouble PCU PWB trouble
Remedy:
Use SIM6-1 to check the operation of the fusing motor. Replace the Fusing motor. Check connection of the fusing motor harness and the connection. Replace the PCU PWB.
Code: L4-04
Description:
Developing motor trouble (BLACK)
The motor lock signal is detected during rotation of the developing motor.
Causes:
Developing motor trouble Developing motor harness and connector connection trouble PCU PWB trouble Developing unit trouble
Remedy:
Use SIM25-1 to check the operation of the developing motor. Replace the developing motor. Check connection of the developing motor harness and the connection. Replace the PCU PWB. Replace the developing motor. Replace the developing unit.
Code: L4-05
Description:
Developing motor trouble (COLOR)
The motor lock signal is detected during rotation of the developing motor.
Causes:
Developing motor trouble Developing motor harness and connector connection trouble PCU PWB trouble Developing unit trouble
Remedy:
Use SIM25-1 to check the operation of the developing motor. Replace the developing motor. Check connection of the developing motor harness and the connection. Replace the PCU PWB. Replace the developing motor. Replace the developing unit.
Code: L4-06
Description:
Transfer unit lift trouble
A change in the primary transfer position sensor cannot be detected within the specified time in lifting operation of the primary transfer unit.
Causes:
Transfer unit position sensor trouble Dirt on the transfer unit position sensor. PCU PWB trouble Connection trouble of the connector and the harness. Transfer unit lift mechanism trouble Primary transfer belt unit is not installed.
Remedy:
Use SIM6-3 to check the separating operation of the transfer unit. Install the primary transfer belt unit. Replace the transfer unit position sensor. Clean the transfer unit position sensor. Replace the PCU PWB. Check connection of the connector and the harness. Repair the transfer unit lift mechanism.
Code: L4-07
Description:
Transfer belt motor trouble
Causes:
The motor lock signal is detected during rotation of the transfer belt motor. Transfer belt motor trouble Transfer belt motor harness and connector connection trouble PCU PWB trouble
Remedy:
Use SIM25-1 to check the operation of the transfer belt motor. Check the transfer belt motor, and replace if necessary. Check connection of the harness and connectors of the transfer belt motor, and replace if necessary. Check the PCU PWB, and replace if necessary.
Code: L4-11
Description:
Shift motor trouble
No change in the shifter home position sensor signal is detected in the operation of the shifter initializing.
Causes:
Shift motor trouble. PCU PWB trouble. Connection trouble of the connector and the harness. Shifter home position sensor trouble.
Remedy:
Use SIM6-1 to check the shift operation. Use SIM30-1 to check the operation of the shifter home position sensor. Replace the shift motor. Replace the PCU PWB. Check connection of the connector and the harness. Replace the shifter home position sensor.
Code: L4-12
Description:
Secondary transfer separation trouble
A change in the separation sensor status cannot be detected within the specified time in separation operation of the secondary transfer.
Causes:
Secondary transfer separation mechanism trouble. Secondary transfer separation clutch trouble. Secondary transfer separation sensor trouble. Connection trouble of the connector and the harness. PCU PWB trouble.
Remedy:
Check or repair the secondary transfer separation mechanism. Replace the secondary transfer separation clutch. Replace the secondary transfer separation sensor. Replace the PCU PWB. Check connection of the connector and the harness.
Code: L4-16
Description:
Fusing pressure release trouble
A change in the fusing pressure release sensor signal cannot be detected within the specified time after outputting the fusing pressure release motor.
Causes:
Fusing pressure release sensor trouble. Fusing pressure release motor trouble. Pressure release drive gear and pressure release idle gear trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Replace the fusing pressure release sensor. Replace the fusing pressure release motor. Replace the pressure release drive gear and the pressure release idle gear. Replace the PCU PWB. Check connection of the connector and the harness.
Code: L4-31
Description:
Paper exit cooling fan trouble
The fan operation signal is not detected.
Causes:
Paper exit cooling fan trouble. PCU PWB trouble Connection trouble of the connector and the harness.
Remedy:
Check connection of the connectors and the harness. Use SIM6-2 to check the rotating operation of the fan. Replace the paper exit cooling fan. Replace the PCU PWB.
Code: L4-32
Description:
Power source cooling fan trouble
The fan operation signal is not detected.
Causes:
Power cooling fan trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Use SIM6-2 to check that the fan is actually rotating. Replace the power cooling fan. Replace the PCU PWB. Check connection of the connectors and the harness.
Code: L4-34
Description:
LSU cooling fan trouble
Causes:
When the LSU cooling fan is operated, the fan operation signal is not detected within the specified time. LSU fan trouble. Harness, connector trouble. LSU mother PWB trouble.
Remedy:
Use SIM6-2 to check the fan operation. Check the LSU fan, and replace if necessary. Check the harness/connector, and replace if necessary. Check the LSU mother PWB, and replace if necessary.
Code: L4-35
Description:
Fusing cooling fan trouble
The fan operation signal is not detected.
Causes:
Fusing cooling fan trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Use SIM6-2 to check that the fan is actually rotating. Replace the fusing cooling fan. Replace the PCU PWB. Check connection of the connector and the harness.
Code: L4-43
Description:
Paper exit cooling fan 2 trouble
The fan operation signal is not detected.
Causes:
Paper exit cooling fan trouble. (Machine R side) PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Replace the fan. Replace the PCU PWB. Check the connector and the harness. Use SIM6-2 to check that the fan is actually rotating.
Code: L4-50
Description:
Process fan trouble
The fan operation signal is not detected.
Causes:
Process fan trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Check that the fan is rotating after turning ON the power. Replace the process fan. Replace the PCU PWB. Check connection of the connector and the harness.
Code: L4-51
Description:
Process fan 2 trouble
The fan operation signal is not detected.
Causes:
Fan trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Replace the fan. Replace the PCU PWB. Check the connector and the harness. Check that the fan is rotating after turning ON the power.
Code: L6-10
Description:
Polygon motor trouble
The polygon motor does not reach the specified RPM within the specified time after starting rotation of the polygon motor.
Causes:
Polygon motor trouble. LSU mother PWB trouble. Connection trouble of the connector and the harness.
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.
Code: L8-01
Description:
Full wave signal detection error
The full wave signal is not detected.
Causes:
PCU PWB trouble. Power unit trouble. Connection trouble of the connector and the harness.
Remedy:
Replace the PCU PWB. Replace the power unit. Check connection of the connector and the harness.
Code: L8-20
Description:
Communication error of MFPC PWB/ LSU mother board
Causes:
LSU mother board PWB - MFPC PWB connection trouble. MFPC PWB trouble. LSU mother board trouble.
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.
Code: P1-00
Description:
PCI communication error
Causes:
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.
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.
Code: P1-01
Description:
PCI fan error
Causes:
The PCI fan operation signal is not detected. PCI fan trouble. PCI control PWB trouble.
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.
Code: P1-02
Description:
Plasma generating device error
Causes:
Connection failure of connectors and harness between the plasma generating device and the PCI control PWB. Plasma generating device trouble. PCI control PWB trouble.
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.
Code: PC--
Description:
Personal counter not detected
Causes:
The personal counter is not installed. The personal counter is not detected. SCU PWB trouble.
Remedy:
Check connection of the connectors and the harness. Replace the SCU PWB.
Code: U1-01
Description:
Battery trouble
RTC backup battery voltage fall
Causes:
1) Battery life 2) Battery circuit abnormality
Remedy:
Check to confirm that the battery voltage is about 2.5V or above. Replace the battery.
Code: U2-00
Description:
MFP EEPROM read/write error
Causes:
MFPC PWB EEPROM trouble EEPROM socket contact trouble MFPC PWB trouble Strong external noises.
Remedy:
Replace the MFPC PWB EEPROM. Replace the MFPC PWB. (Refer to the pages on the necessary works after replacing the MFPC PWB in the Service Manual, and perform the works.) Check the power environment.
Code: U2-05
Description:
HDD/MFPC PWB SRAM contents inconsistency (23cpm machine)
The HDD or the MFPC PWB installed is improper. (Erroneous detection of account management data)
Causes:
The HDD was replaced. The MFPC PWB was replaced. HDD trouble MFPC PWB trouble
Remedy:
(Refer to the pages on the necessary works after replacing the HDD and the MFPC PWB in the Service Manual, and perform the works.) Use SIM16 to cancel the error.
Code: U2-05
Description:
Erroneous detection of account management data / HDD internal authentication DB table error (26/31/36cpm machine)
Causes:
The HDD internal authentication DB table is broken. After detection of the broken authentication DB table, the machine is rebooted to rebuild the authentication table. This error can be confirmed only by the error history of SIM22-4. If frequent occurrence of this error is found, the following devices may possibly be damaged. HDD trouble MFPC PWB trouble
Remedy:
Check the HDD, and replace if necessary. Check the MFPC PWB, and replace if necessary. When replacing the HDD and the MFPC PWB, refer to "Necessary works and procedures for replacement of HDD and MFPC PWB" and perform the necessary procedures. If this error does not occur frequently, the above procedure is not required.
Code: U2-10
Description:
MFPC PWB SRAM user authentication index check sum error
Causes:
SRAM user index information (user authentication basic data) check sum error. MFPC PWB SRAM trouble. MFPC PWB trouble. Strong external noises.
Remedy:
Use SIM16 to cancel the error. (Index information data in the HDD are transferred to the SRAM.) Replace the MFPC PWB. (Refer to the pages on the necessary works after replacing the MFPC PWB in the Service Manual, and perform the works.)
Code: U2-11
Description:
MFPC PWB EEPROM counter check sum error
Causes:
MFPC PWB EEPROM trouble EEPROM socket contact trouble MFPC PWB trouble Strong external noises.
Remedy:
Use SIM16 to cancel the error. (The previous writing data (about the latest 8 sheets) are written into the EEPROM.) Replace the MFPC PWB. (Refer to the pages on the necessary works after replacing the MFPC PWB in the Service Manual, and perform the works.)
Code: U2-24
Description:
MFPC PWB SRAM memory user authentication counter check sum error
Causes:
MFPC PWB SRAM trouble MFPC PWB trouble Strong external noises.
Remedy:
Use SIM16 to cancel the error. (The check sum error detection data are calculated again to reset the proper check sum data.) Replace the MFPC PWB. (Refer to the pages on the necessary works after replacing the MFPC PWB in the Service Manual, and perform the works.)
Code: U2-30
Description:
MFPC PWB and PCU PWB manufacturing No. data inconsistency
Inconsistency between the manufacturing No. saved in the PCU PWB and that in the MFPC PWB.
Causes:
When replacing the PCU PWB or the MFPC PWB, the EEPROM which was mounted on the PWB before replacement is not mounted on the new PWB. MFPC PWB trouble PCU PWB trouble
Remedy:
Check that the EEPROM is properly set. Check to confirm that the EEPROM which was mounted on the PWB before replacement is mounted on the new PWB. Replace the MFPC PWB. (Refer to the pages on the necessary works after replacing the MFPC PWB in the Service Manual, and perform the works.) Replace the PCU PWB.
Code: U2-40
Description:
SD card system storage data area error
Causes:
A file error occurs in the SD card system storage data partition. SD card trouble MFPC PWB trouble
Remedy:
Turn OFF/ON the power, and the backup data in the HDD are written into the SD card and the machine is automatically booted. Check the MFPC PWB, and replace if necessary. Check the SD card, and replace if necessary.
Code: U2-41
Description:
HDD system storage data area error
Causes:
A file error occurs in the HDD system saved data area, disabling backup of the saved file of the machine adjustment values in the SD card. HDD trouble MFPC PWB trouble
Remedy:
Check the HDD, and replace if necessary. Check the MFPC PWB, and replace if necessary. When replacing the HDD and the MFPC PWB, refer to the chapter of "Necessary works and procedures of HDD and MFPC PWB replacement."
Code: U2-42
Description:
Machine adjustment data (system storage data area) error
Causes:
The saved file of the machine adjustment values in the SD card and the HDD cannot be found or is broken. Both of the SD card set data and the HDD system saved data area are broken. HDD trouble MFPC PWB trouble SD card trouble
Remedy:
Check the HDD, and replace if necessary. Check the MFPC PWB, and replace if necessary. Check the SD card, and replace if necessary. When replacing the HDD, the MFPC PWB, and the SD card, refer to the chapter of "Necessary works and procedures of HDD, MFPC PWB, and SD card replacement." Use SIM to adjust the machine again and set the adjustment values.
Code: U2-50
Description:
HDD user authentication data check sum error
Causes:
HDD trouble MFPC PWB trouble Strong external noises
Remedy:
Check the data related to the check sum error (address book, image send system registration data (senders record, meta data)) and register again. Use SIM16 to cancel the U2 trouble. Replace the HDD. Replace the MFPC PWB. (Refer to the pages on the necessary works after replacing the HDD and the MFPC PWB in the Service Manual, and perform the works.)
Code: U2-60
Description:
Watermark check error
Causes:
Watermark data trouble HDD trouble MFPC PWB trouble
Remedy:
Use SIM16 to cancel the U2 trouble. Use SIM49-5 to install the watermark data. Replace the HDD. Replace the MFPC PWB. (Refer to the pages on the necessary works after replacing the HDD and the MFPC PWB in the Service Manual, and perform the works.)
Code: U2-80
Description:
SCU PWB EEPROM read/write error
Causes:
SCU PWB EEPROM trouble SCU PWB trouble SCU PWB EEPROM socket connection trouble
Remedy:
Replace the SCU PWB EEPROM. Replace the SCU PWB. Check connection of the SCU PWB EEPROM socket. Check the SIM adjustment value of the following items, and adjust again if they are improper. • Scanner-related adjustments • Touch panel-related adjustments Use SIM16 to cancel the trouble.
Code: U2-81
Description:
SCU PWB EEPROM check sum error
Causes:
SCU PWB EEPROM trouble. Installation of non-initialized EEPROM. SCU PWB trouble. EEPROM socket contact trouble.
Remedy:
Replace the SCU PWB EEPROM. Replace the SCU 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.)
Code: U2-90
Description:
PCU PWB EEPROM read/write error
Causes:
PCU PWB EEPROM trouble PCU PWB trouble EEPROM socket contact trouble
Remedy:
Replace the PCU PWB EEPROM. Check the SIM adjustment values of the engine, and adjust again if they are improper. Replace the PCU PWB. Check contact of the EEPROM socket. Use SIM16 to cancel the trouble.
Code: U2-91
Description:
PCU PWB EEPROM check sum error
Causes:
PCU PWB EEPROM trouble PCU PWB trouble EEPROM socket contact trouble
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.)
Code: U6-00
Description:
PCU PWB - Paper feed desk (paper feed tray 3, 4) communication trouble
Causes:
Connection trouble of the connector and the harness. Paper feed desk control PWB trouble PCU PWB trouble
Remedy:
Check connection of the connector and the harness. Replace the paper feed desk control PWB. Replace the PCU PWB.
Code: U6-01
Description:
Desk paper feed tray 1 lift trouble
D1ULD does not turn ON within the specified time when lift-up operation.
Causes:
D1ULD sensor trouble. Desk control PWB trouble. Lift unit trouble. Connection trouble of the connector and the harness. PCU PWB trouble.
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.
Code: U6-02
Description:
Desk paper feed tray 2 lift trouble
D2ULD does not turn ON within the specified time when lift-up operation.
Causes:
D2ULD sensor trouble Desk control PWB trouble Lift unit trouble Connection trouble of the connector and the harness. PCU PWB trouble
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.
Code: U6-09
Description:
LCC lift motor trouble
No variation in the motor rotation sensor signal (encoder sign) is detected within the specified time after booting or stopping the LCC lift motor.
Causes:
LCC lift motor rotation sensor trouble LCC control PWB trouble LCC lift mechanism trouble LCC lift motor trouble
Remedy:
Use SIM4-2 and 4-3 to check the operation of the LCC sensor and the lift motor. Check the LCC lift motor rotation sensor, and replace if necessary. Check the LCC control PWB, and replace if necessary. Check the LCC lift mechanism, and repair if necessary. Check the LCC lift motor, and replace if necessary. Use SIM15 to cancel the trouble.
Code: U6-10
Description:
Desk paper feed unit paper transport motor trouble
Causes:
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.
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.
Code: U6-20
Description:
LCC control PWB - PCU PWB communication error
Causes:
Communication error between the LCC control PWB and the PCU PWB. Connection trouble of the harness and the connector between the machine and the LCC and those of the LCC control PWB. LCC control PWB trouble PCU PWB trouble Malfunction due to noises.
Remedy:
Check to confirm the LCC model. Check the connection of the harness and the connector between the machine and the LCC and those of the LCC control PWB, and replace if necessary. Check the LCC control PWB, and replace if necessary. Check the PCU PWB, and replace if necessary.
Code: U6-21
Description:
LCC transport motor trouble
No variation in the motor rotation sensor signal (encoder sign) is detected within the specified time after booting or stopping the LCC transport motor.
Causes:
LCC transport motor rotation sensor trouble LCC control PWB trouble LCC paper transport mechanism trouble LCC paper transport motor trouble
Remedy:
Use SIM4-3 to check the operation of the LCC transport motor. Check the LCC transport motor rotation sensor, and replace if necessary. Check the LCC control PWB, and replace if necessary. Check the LCC paper transport mechanism, and replace if necessary. Check the LCC transport motor, and replace if necessary.

Code: U6-22
Description:
LCC 24V power trouble
The power voltage of DC24V is not supplied to the LCC unit.
Causes:
Connection trouble of the harness and the connector between the machine and the LCC and those of the LCC control PWB. LCC control PWB trouble Machine power unit trouble
Remedy:
connector between the machine and the LCC and those of the LCC control PWB, and replace if necessary. Check the LCC control PWB, and replace if necessary. Check the machine power unit, and replace if necessary.
Code: U6-50
Description:
Desk - Main unit combination trouble
Causes:
Improper combination between the main unit and the desk. Desk control PWB trouble.
Remedy:
Install a desk which is proper for the main unit mode. Replace the desk control PWB.
Code: U6-51
Description:
LCC - Main unit combination trouble
An LCC of a different model which is not supported by the machine is installed. (Improper combination of the machine and the LCC model code.)
Causes:
LCC control PWB trouble PCU PWB trouble
Remedy:
Check to confirm the LCC model. Check the LCC control PWB, and replace if necessary. Check the PCU PWB, and replace if necessary.
Code: U6-52
Description:
PCU PWB - Paper feed desk (paper feed tray 2) communication trouble
Paper feed tray 2 (desk unit) is not recognized.
Causes:
Connection failure between the machine and paper feed tray 2 (desk unit)
PCU PWB trouble.
Remedy:
Check connection of the connector and the harness. Replace the PCU PWB.
Code: U7-50
Description:
MFPC PWB - Vendor machine communication error
Communication error between the MFP and the serial vendor.
Causes:
Improper setting of the vendor machine specifications (SIM26-3). Vendor machine trouble. MFPC PWB trouble. Connector, harness connection trouble. Strong external noises.
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.
Code: U7-51
Description:
Vendor machine error
MFP (Notification of a trouble from the serial vendor)
Causes:
Serial vendor machine trouble. Connector, harness connection trouble.
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.
Code: UC-02
Description:
CPT - ASIC error
SCU PWB trouble. (CPT-ASIC trouble.)
Causes:
SCU PWB trouble. (CPT-ASIC trouble.)
Remedy:
Replace the SCU PWB.
Code: UC-20
Description:
DOCC ASIC error
Causes:
SCU PWB trouble. (DOCC-ASIC trouble.)
Remedy:
Replace the SCU PWB.