Code: F3-12
Description:
Paper feed tray 1 lift operation trouble
Causes:
LUD1 is not turned ON within the specified time. CLUD1 sensor trouble Paper feed tray 1 lift unit trouble. PCU PWB trouble. Harness and connector connection trouble.
Remedy:
Check connection of the harness and the connector of LUD1. Replace the lift-up unit. Replace the PCU PWB.
Code: F3-22
Description:
Paper feed tray 2 lift operation trouble
LUD2 does not turn ON within the specified time.
Causes:
LUD2 does not turn ON within the specified time. CLUD2 sensor trouble. Paper feed tray 2 lift unit trouble. PCU PWB trouble. Harness and connector connection trouble.
Remedy:
Check the harness and the connector of LUD2. Replace the lift-up unit. Replace the PCU PWB.
Code: F6-00
Description:
MFP-FAX communication trouble
Communication establishment error/Framing/Parity/ Protocol error
Causes:
FAX unit PWB connector connection error FAX unit PWB - MFPcnt PWB harness trouble FAX unit PWB mother board connector pin breakage FAX unit ROM trouble/ROM pin breakage
Remedy:
Case 1 Cause FAX unit PWB connector connection error Check and remedy Check the connector connection between the FAX unit PWB and the MFPcnt PWB. Case 2 Cause FAX unit PWB - MFPcnt PWB harness trouble Check and remedy Check the connector harness between the FAX unit PWB and the MFPcnt PWB. Case 3 Cause FAX unit PWB mother board connector pin breakage Check and remedy Check the machine grounding. Case 4 Cause FAX unit ROM trouble/ROM pin breakage Check and remedy Check the FAX unit PWB ROM.
Code: F6-01
Description:
FAX board EEPROM read/write error
EEPROM access error (read/write)
Causes:
EEPROM trouble FAX PWB EEPROM access circuit trouble
Remedy:
Case 1 Cause EEPROM trouble Check and remedy Check that no trouble occurs after replacement of EEPROM. Execute the memory check of SIM66-3 to insure that EEPROM can be accessed. Case 2 Cause FAX PWB EEPROM access circuit trouble Check and remedy Replace the PWB. In this case, not need to execute the simulation.
Code: F6-04
Description:
FAX MODEM operation trouble
FAX PWB MODEM chip operation trouble
Causes:
FAX PWB MODEM chip operation trouble
The FAX PWB MODEM chip cannot be accessed.
Remedy:
Case 1 Cause FAX PWB MODEM chip operation trouble Check and remedy Replace the FAX PWB MODEM chip. Case 2 Cause The FAX PWB MODEM chip cannot be accessed. Check and remedy Replace the FAX PWB
Code: F6-21
Description:
Combination error between the TEL/LIU PWB and the FAX soft switch
Combination error between the TEL/LIU PWB and the FAX PWB information (soft switch)
Causes:
The destination of the installed TEL/LIU PWB differs. The FAX PWB information (soft switch) differs. TEL/LIU PWB trouble
Remedy:
Case 1 Cause The destination of the installed TEL/LIU PWB differs. Check and remedy Check the destination of the installed TEL/LIU PWB. Case 2 Cause The FAX PWB information (soft switch) differs. Check and remedy Check the FAX PWB information (soft switch). Case 3 Cause TEL/LIU PWB trouble Check and remedy Replace the TEL/LIU PWB.
Code: F6-30
Description:
Access error to 1-chip microprocessor on the FAX board (FAX detection)
Access error (read/write) to 1-chip microprocessor on the FAX board
Causes:
Program writing error (or no writing) to the 1-chip microprocessor 1-chip microprocessor trouble FAX PWB 1-chip microprocessor access circuit trouble
Remedy:
Case 1 Cause Program writing error (or no writing) to the 1-chip microprocessor Check and remedy Use SIM66-24 to rewrite the 1-chip microprocessor program. Case 2 Cause 1-chip microprocessor trouble Check and remedy Replace the 1-chip microprocessor chip. When replacing, use SIM66-42 to rewrite the 1-chip microprocessor program. Case 3 Cause FAX PWB 1-chip microprocessor access circuit trouble Check and remedy Replace the FAX PWB.
Code: F6-97
Description:
The FAX PWB does not match with the machine model. The FAX PWB identification model does not match with the machine model.
Causes:
An improper type of FAX PWB is installed to the machine.
Remedy:
Replace the FAX PWB with a proper one.
Code: F6-98
Description:
Combination error between the FAXBOX destination information and the machine destination information.
Causes:
Combination error between the destination information written in EEPROM on the FAX PWB and the destination information of the machine (set with SIM26-6).
Remedy:
1) Check the destination of the FAX PWB. 2) Check the destination of the machine. (SIM26-6) 3) Use a proper combination of the machine and the FAX PWB.
Code: H2-00
Description:
Thermistor open trouble (TH_UM)
Causes:
Thermistor trouble. PCU PWB trouble Connection trouble of the connector and the harness. Fusing unit not installed.
Remedy:
Replace the thermistor. Replace the PCU PWB. Check connection of the connector and the harness.
Code: H2-02
Description:
Thermistor open trouble (TH_US)
Causes:
Thermistor trouble. PCU PWB trouble. Connection trouble of the connector and the harness. Fusing unit not installed.
Remedy:
Replace the thermistor. Replace the PCU PWB. Check connection of the connector and the harness.
Code: H3-00
Description:
Fusing section high temperature trouble (TH_UM)
Causes:
The fusing temperature exceeds the specified level. Thermistor trouble. PCU PWB trouble Connection trouble of the fusing section connector and the harness. HL PWB trouble.
Remedy:
Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble. Replace the thermistor. Replace the PCU PWB. Check connection of the connector and the harness. Replace the HL PWB.
Code: H3-02
Description:
Fusing section high temperature trouble (TH_US)
Causes:
The fusing temperature exceeds the specified level. Thermistor trouble. PCU PWB trouble. HL PWB trouble. Fusing section connector connection trouble. HL PWB trouble.
Remedy:
Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble. Check connection of the thermistor and the harness. Check the PCU PWB thermistor input circuit section. (When the lamp is ON:) Check the HL PWB and the PCU PWB lamp circuit. Replace the thermistor, the HL PWB, and the PCU PWB.
Code: H4-00
Description:
Fusing section low temperature trouble (TH_UM)
Causes:
The fusing temperature does not reach the specified level within the specified time from turning ON the power relay. Thermistor trouble. Heater lamp trouble. PCU PWB trouble. Thermostat trouble. Connector, harness connection trouble. HL PWB trouble. Interlock switch 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 PWB. Replace the interlock switch. Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble.
Code: H4-02
Description:
Fusing section low temperature trouble (TH_US)
Causes:
The fusing temperature does not reach the specified level within the specified time from turning ON the power relay. Thermistor trouble. Heater lamp trouble. PCU PWB trouble Thermostat trouble. Connector, harness connection trouble. HL PWB trouble. Interlock switch 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 PWB. Replace the interlock switch. Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble.
Code: H5-01
Description:
5 times continuous POD1 not-reach jam
Causes:
A fusing jam is not canceled completely. (A jam paper remains.) POD1 sensor trouble. Fusing unit installation trouble. Connector, harness connection trouble. PCU PWB trouble
Remedy:
Replace the POD1 sensor. Check the installing position of the fusing unit. Replace the fusing unit. Check connection of the connector and the harness. Replace the PCU PWB. Use SIM14 to cancel the trouble.
Code: H7-10
Description:
Recovery error from low fuser temp. (TH_UM_AD2)
Causes:
The fusing temperature does not reach the specified level within the specified time from stopping a job due to fall in the fusing temperature. Thermistor trouble. Heater lamp trouble. PCU PWB trouble Thermostat trouble. Connector, harness connection trouble. HL PWB 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 PWB. Use SIM5-2 to check the flashing operation of the heater lamp.
Code: H7-12
Description:
Recovery error from low fuser temp. (TH_US)
Causes:
The fusing temperature does not reach the specified level within the specified time from stopping a job due to fall in the fusing temperature. Thermistor trouble. Heater lamp trouble. PCU PWB trouble Thermostat trouble. Connector, harness connection trouble. HL PWB 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 PWB. Use SIM5-2 to check the flashing operation of the heater lamp.
Code: L1-00
Description:
Scanner feed trouble
Causes:
Scanner feed is not completed within the specified time. 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
Causes:
Scanner return is not completed within the specified time. 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
Causes:
A lock signal is detected during ON period of the paper feed motor in warming up or canceling a jam. Paper feed motor trouble. 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 connectors and the harness. Replace the PCU PWB.
Code: L4-03
Description:
Fusing motor trouble
Causes:
The motor lock signal is detected during rotation of the fusing motor. Fusing motor trouble. Connection trouble of the connector and the harness. PCU PWB trouble.
Remedy:
Use SIM6-1 to check the operation of the fusing motor. Replace the Fusing motor. Check connection of the connectors and the harness. Replace the PCU PWB.

Code: L4-04
Description:
Drum motor trouble
Causes:
The motor lock signal is detected during rotation of the drum motor. Drum motor trouble. Drum unit trouble. Harness and connector connection trouble. PCU PWB trouble Developing unit trouble.
Remedy:
Use SIM25-1 to check the operation of the drum motor. Replace the drum motor. Check connection of the connectors and the harness. Replace the PCU PWB. Replace the drum unit. Replace the developing unit.
Code: L4-11
Description:
Shift motor trouble
Causes:
No change in the shifter home position sensor signal is detected in the operation of the shifter initializing. 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: L4-30
Description:
MFP fan motor trouble
Causes:
Fan motor trouble. MFP PWB trouble.Harness and connector connection trouble. PCU PWB trouble
Remedy:
Use SIM6-2 to check the operation of the fan motor. Replace the fan motor. Replace the MFP PWB. Check connection of the connector and the harness. Replace the PCU PWB.
Code: L4-31
Description:
Paper exit cooling fan (POFM1/2) trouble
Causes:
The fan operation signal is not detected within the specified time in the paper exit cooling fan operation. 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
Causes:
The fan operation signal is not detected within the specified time in the power cooling fan operation. Power cooling fan trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Use SIM6-2 to check the operation of the fan motor. Replace the power cooling fan. Replace the PCU PWB. Check/replace the connector or 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 cooling fan trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Use SIM6-2 to check the operation of the fan motor. Replace the LSU cooling fan. Replace the PCU PWB. Replace the LSU control PWB. Check connection of the connector and the harness.
Code: L4-43
Description:
Paper exit cooling fan (POFM3) trouble
Causes:
The fan operation signal is not detected within the specified time in the paper exit cooling fan operation. Paper exit cooling fan trouble. PCU PWB trouble Connection trouble of the connector and the harness.
Remedy:
Check connection of the connector and the harness. Use SIM6-2 to check the operation of the fan motor. Replace the paper exit cooling fan. Replace the PCU PWB.
Code: L4-58
Description:
Ozone exhaust fan trouble
Causes:
The fan operation signal is not detected within the specified time in the ozone exhaust fan operation. Ozone exhaust 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 ozone exhaust fan. Replace the PCU PWB. Check connection of the connector and the harness.
Code: L4-59
Description:
Suction fan trouble
Causes:
The fan operation signal is not detected within the specified time in the suction fan operation. Suction 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 suction fan. Replace the PCU PWB. Check connection of the connector and the harness.
Code: L6-10
Description:
Polygon motor trouble
Causes:
The motor does not reach the specified rpm in 8 sec after starting rotation of the polygon motor. Polygon motor trouble. LSU control 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 polygon motor. Replace the LSU. Replace the LSU control PWB.
Code: L8-01
Description:
Full wave signal detection error
Causes:
No full wave signal is detected. 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: L8-02
Description:
Full wave signal error
Causes:
An abnormality in the full wave signal frequency 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, waveform abnormality.
Remedy:
Replace the PCU PWB. Replace the power unit. Check connection of the connector and the harness. Check the power waveform.
Code: L8-20
Description:
Communication error of MFP PWB/ Mother board
Causes:
Mother board PWB - MFP PWB connection trouble. MFP PWB trouble. Mother trouble.
Remedy:
Check connection between the mother board and the MFP PWB. Check the ground of the main unit. Replace the MFPC PWB. Replace the mother board.
Code: PC--
Description:
Personal counter not detected
Causes:
The personal counter is not installed. The personal counter is not detected.
Remedy:
Check connection of the connectors and the harness. Replace the SCU PWB.
Code: U1-01
Description:
Battery trouble
Backup SRAM battery voltage fall.
Causes:
Battery life Battery circuit abnormality
Remedy:
Check to confirm that the battery voltage is about 2.0V or above.
Code: U2-00
Description:
MFP EEPROM read/write error
Causes:
MFP PWB EEPROM trouble. EEPROM socket contact trouble. MFP PWB trouble. Strong external noises
Remedy:
Replace the MFP PWB EEPROM. Replace the MFP PWB. Check the power environment.

Code: U2-05
Description:
HDD/MFP PWB SRAM contents inconsistency
Causes:
The HDD or the MFP PWB which differs from that before turning OFF the power is installed. HDD trouble. MFP PWB trouble.
Remedy:
Use SIM16 to cancel the error. If there is backup data (export data by device cloning), import it.
Code: U2-10
Description:
MFP PWB SRAM user authentication index check sum error
Causes:
SRAM user index information (user authentication basic data) check sum error. MFP PWB SRAM trouble. Strong external noises.
Remedy:
Use SIM16 to cancel the error. Transfer the user index information data in the HDD to the SRAM. Replace the MFP PWB.
Code: U2-11
Description:
MFP PWB EEPROM counter check sum error
Causes:
MFP PWB EEPROM trouble. EEPROM socket contact trouble. MFP PWB trouble. Strong external noises.
Remedy:
Use SIM16 to cancel the error. Replace the MFP PWB.
Code: U2-22
Description:
MFP PWB SRAM memory check sum error
Causes:
The identifier which controls the communication management table stored in the SRAM and the FAX soft switch is not detected correctly. MFP PWB SRAM trouble. MFP PWB trouble. Strong external noises.
Remedy:
Since the data of the communication management table and the FAX soft switch stored in the SRAM are initialized when an error occurs, register the deleted data again individually. Use SIM16 to cancel the error. Replace the MFP PWB.
Code: U2-23
Description:
MFP PWB SRAM memory individual data check sum error
MFP PWB SRAM memory individual data check sum error.
Causes:
The check sum value for individual data of the communication table and the sender registration does not match. MFP PWB SRAM trouble. MFP PWB trouble. Strong external noises.
Remedy:
Turn OFF/ON the power to initialize the data related to the content of check sum error. Since the registered contents are deleted, register the deleted contents again. Use SIM16 to cancel the error. Replace the MFP PWB.
Code: U2-24
Description:
MFP PWB SRAM memory user authentication counter check sum error
Causes:
MFP PWB SRAM trouble. MFP PWB trouble. Strong external noises.
Remedy:
Use SIM16 to cancel the error.
Code: U2-30
Description:
MFP PWB and PCU PWB manufacturing No. data inconsistency
Causes:
Inconsistency between the manufacturing No. saved in the PCU PWB and that in the MFP PWB. When replacing the PCU PWB or the MFP PWB, the EEPROM which was mounted on the PWB before replacement is not mounted on the new PWB. MFP 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 MFP PWB. Replace the PCU PWB.
Code: U2-50
Description:
HDD/Flash memory registration data check sum error
HDD/MFP Flash data check sum error (MFP PWB detection)
Causes:
HDD/MFP PWB Flash memory data check sum error (when HDD is not installed) • Address book • Image send series registration data (Sender record, meta data, etc.) • Job end list (FAX/Internet FAX/scanner job only), etc. Error in write/read circuit to HDD or MFP Flash memory Malfunctions caused by noises MFP PWB HSS access circuit error
Remedy:
Use SIM16 to cancel the U2 trouble. Check the following data for any abnormality. If there is any abnormality, reset and register the content. • Address book • Image send series registration data (Sender record, meta data, etc.) • Job end list (FAX/Internet FAX/scanner job only), etc. Replace the HDD. Replace the MFP PWB.

Code: U2-60
Description:
Water Mark check error
Causes:
Watermark data trouble
Remedy:
Use SIM49-5 to upload the watermark data.
Code: U2-80
Description:
SCU PWB EEPROM read/write error
Causes:
SCU PWB EEPROM trouble. SCU PWB trouble. EEPROM socket contact trouble.
Remedy:
Replace the SCU PWB EEPROM. Replace the SCU PWB. Check contact of the EEPROM socket. Put down the counter/adjustment values in the simulation to prevent against loss of the counter data and the adjustment values. 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. Put down the counter/adjustment values in the simulation to prevent against loss of the counter data and the adjustment values. Use SIM16 to cancel the trouble.
Code: U2-90
Description:
PCU PWB EEPROM read/write error
Causes:
PCU PWB EEPROM trouble. Installation of non-initialized EEPROM. PCU PWB trouble EEPROM socket contact trouble.
Remedy:
Replace the PCU PWB EEPROM. Replace the PCU PWB. Check contact of the EEPROM socket. Put down the counter/adjustment values in the simulation to prevent against loss of the counter data and the adjustment values. Use SIM16 to cancel the trouble.
Code: U2-91
Description:
PCU PWB EEPROM check sum error
Causes:
PCU PWB EEPROM trouble. Installation of non-initialized EEPROM. PCU PWB trouble EEPROM socket contact trouble.
Remedy:
Replace the PCU PWB EEPROM. Replace the PCU PWB. Check contact of the EEPROM socket. Put down the counter/adjustment values in the simulation to prevent against loss of the counter data and the adjustment values. Use SIM16 to cancel the trouble.
Code: U5-00
Description:
Document feed unit communication
error
Causes:
Connector, harness connection trouble. SCU PWB trouble. DSPF PWB trouble.
Remedy:
Turn OFF/ON the power. Check connection of the connector and the harness. Replace the SCU PWB. Replace the DSPF PWB.
Code: U5-16
Description:
Document feed unit fan motor trouble
Causes:
Fan motor trouble. Connection trouble of the connector and the harness.
Remedy:
Use SIM2-3 to check the operation. Check the DSPF PWB and the driver PWB connection of the connector and the harness.
Code: U5-40
Description:
Document feed unit installation trouble
Causes:
When two or more document feed units are detected. Connection trouble of the connector and the harness. Document feeder trouble.
Remedy:
Check connection of the connector and the harness.
Code: U6-00
Description:
Communication error of PCU PWB/ Desk paper feed unit
Causes:
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.
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.
Code: U6-01
Description:
Desk paper feed tray 1 lift trouble
Causes:
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
Remedy:
Replace the DLUD1 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
Causes:
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
Remedy:
Replace the DLUD2 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 trouble
Causes:
No change in the lift motor rotation sensor signal is detected within the specified time after outputting the lift motor ON signal. The lift motor rotation sensor signal varies though the lift motor is stopped. Lift motor rotation sensor trouble. LCC control PWB trouble Lift mechanism trouble. Lift motor trouble. Connection trouble of the connector and the harness.
Remedy:
Use SIM4-2 and 4-3 to check the operation of the sensor and the lift motor. Replace the lift motor rotation sensor. Replace the LCC control PWB. Replace the lift mechanism. Replace the lift motor. Check connection of the connector and the harness. 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:
PCU PWB - LCC communication error
Causes:
Error when testing the communication line after turning ON the power or canceling the simulation. LCC control PWB trouble. PCU PWB trouble. Connector, harness connection trouble. Strong external noises. Improper combination between the main unit and the LCC.
Remedy:
Cancel the error by turning OFF/ON the power. Check the connector and the harness in the communication line. Replace the LCC control PWB. Replace the PCU PWB.
Code: U6-21
Description:
LCC paper transport motor trouble
Causes:
No change in the paper transport motor rotation sensor signal is detected within the specified time after outputting the paper transport motor ON signal. The paper transport motor rotation sensor signal varies though the paper transport motor is stopped. Paper transport motor rotation sensor trouble. LCC control PWB trouble. Mechanism trouble. Paper transport motor trouble. Connection trouble of the connector and the harness.
Remedy:
Use SIM4-3 to check the operation of the paper transport motor. Replace the paper transport motor. Replace the LCC control PWB. Replace the mechanism. Replace the paper transport motor. Check connection of the connector and the harness.
Code: U6-22
Description:
LCC 24V power trouble
Causes:
The DC24V power is not supplied from the main unit to the LCC. Connector, harness connection trouble. LCC control PWB trouble. Power source unit trouble.
Remedy:
Check the connector and the harness in the power line. Replace the power unit. Replace the LCC control PWB.

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
Causes:
Improper combination between the main unit and the LCC. LCC control PWB trouble.
Remedy:
Install a LCC which is proper for the main unit mode. Replace the LCC control PWB.
Code: U7-50
Description:
MFP 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. MFP 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 MFP 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:
IPD/DOCC ASIC IPD section error (N model only)
Causes:
SCU PWB trouble (IPD/DOCC ASIC trouble).
Remedy:
Replace the SCU PWB.
Code: UC-20
Description:
IPD/DOCC ASIC DOCC section error (N model only)
Causes:
SCU PWB trouble (IPD/DOCC ASIC trouble).
Remedy:
Replace the SCU PWB.