Code: C1 00
Description:
MC trouble. Main charger output error (output released) Trouble signal from high-voltage transformer
Causes:
Main charger improperly installed Main charger improperly assembled High-voltage transformer connector removed High-voltage harness removed or wire broken
Remedy:
Check main charger output with SIM8-2. Check main charger connector for disconnection. Replace high-voltage unit.
Code: C2 00
Description:
TC trouble. Transfer charger output error (output short-circuiting) Trouble signal from high-voltage transformer
Causes:
Transfer charger contaminated with foreign matter Transfer charger wire broken High-voltage transformer connector disconnected
Remedy:
Check transfer charger output with SIM8-6. Replace high-voltage unit.
Code: E7 00
Description:
ICU communication trouble (ICU detection). Communication setup error, framing/parity/protocol error
Causes:
Slave unit PWB connector improper connection Slave unit PWB – ICU PWB harness trouble Connector pin breakage of the motor PWB of the slave unit PWB Slave unit ROM trouble. no ROM, ROM reverse insertion, ROM pin breakage
Remedy:
Connect the connector of the slave unit PWB and the ICU PWB. Check the connection and the harness. Check the grounding of the copier. Check the ROM of the slave unit PWB.
Code: E7 01
Description:
Image data memory trouble. The ICU image data memory (SIMM) is detected only as 8MB or less. The SIMM capacity is insufficient for the model.
Causes:
The ICU PWB SIMM is not installed. The ICU PWB SIMM does not work properly. The ICU PWB SIMM is not installed properly. ICU PWB abnormality
Remedy:
Check installation of the ICU PWB SIMM. Check the SIMM capacity with SIM 22-10. Replace the ICU PWB SIMM.
Code: E7 02
Description:
Laser trouble. BD signal from LSU kept at OFF or ON
Causes:
Connector to LSU or harness inside LSU disconnected or wire broken Polygon motor improperly rotating Laser home position sensor improperly positioned inside LSU Laser power supply line does not have proper voltage Laser LED improperly lighting ICU PWB error
Remedy:
Check LSU connector for disconnection. Check LSU operation with SIM61-1. Check polygon motor for rotation. Check laser LED for lighting. Replace LSU unit. Replace ICU PWB.
Code: E7 03
Description:
HDD trouble. HDD is not recognized in the model with HDD installed.
Causes:
The HDD is not installed to the ICU PWB. The HDD does not work properly in the ICU PWB. The HDD is not installed to the ICU PWB properly. ICU PWB abnormality
Remedy:
Check installation of the HDD to the ICU PWB. Check connection of the HDD harness to the ICU. Replace the HDD. Replace the ICU PWB.
Code: E7 10
Description:
Shading trouble (black correction). Improper CCD black reading level for copy lamp going out
Causes:
Improper installation of flat cable to CCD unit CCD unit error ICU PWB error
Remedy:
Check flat cable to CCD unit for installation. Check CCD unit. Check ICU PWB.
Code: E7 11
Description:
Shading trouble (white correction). Improper CCD white reference plate reading level for copy lamp lighting
Causes:
Improper installation of flat cable to CCD unit Mirror, lens or reference white plate contaminated Copy lamp operation error Improperly installed CCD unit CCD unit error ICD PWB error
Remedy:
Clean mirror, lens, or reference white plate. Check copy lamp for light amount (SIM5-3) and lighting. Check CCD unit. Check ICU PWB.

Code: E7 13
Description:
CCD light quantity check error. Copy lamp light amount adjustment in shading cannot be made
Causes:
Copy lamp does not light (broken wire, improper installation) Improper installation of flat cable to CCD unit Improper connection of copy lamp CL lead wire Mirror, lens, or reference white plate Dirt or dew Improper output of copy lamp power supply Improper installation of CCD unit CCD unit error ICU PWB error
Remedy:
Clean mirror, lens, reference white plate. Check copy lamp for light amount (SIM5-3) and lighting. Check CCD unit. Check ICU PWB.
Code: E7 90
Description:
ICU communication trouble (PCU detection). Communication setup error/framing/parity/protocol error
Causes:
Slave unit PWB connector improper connection Slave unit PWB – ICU PWB harness trouble Slave unit PWB mother board connector pin breakage
Remedy:
Check the slave unit PWB and the ICU PWB connector connection. Check the copier earth.
Code: EE EL
Description:
Auto developing adjustment trouble (overtoner). A sample data is less than 0 when auto developing adjustment is executed.
Causes:
Toner density sensor defective Charging voltage or developing voltage improper. Toner density improper Developing unit defective PCU PWB defective
Remedy:
Make auto developing adjustment with SIM25-2.
Code: EE EU
Description:
Auto developing adjustment trouble (undertoner). A sample data is less than 99 when auto developing adjustment is executed.
Causes:
Toner density sensor defective Charging voltage or developing voltage improper Toner density improper Unit defective PCU PWB defective
Remedy:
Make auto developing adjustment with SIM25-2.
Code: F1 00
Description:
Finisher communication trouble. Communication line test error occurs when power is turned on or after the exit of a simulation mode. Improper communication with sorter
Causes:
Improper connection or broken wire of connector or harness between copier and sorter Finisher control PWB defective Control PWB (PCU) defective Malfunction due to noise
Remedy:
Clear by turning the power supply OFF/ON. Check communication line connector and harness. Replace Finisher control PWB or PCU PWB.
Code: F1 01
Description:
Finisher1 jogger shift trouble / Finisher 2 alignment section abnormality. ogger shift trouble / Alignment plate shift trouble
Causes:
Motor lock Motor rpm abnormality Motor overcurrent Finisher control PWB trouble
Remedy:
Check the jogger motor operation with SIM 3-3.
Code: F1 02
Description:
Finisher transport motor abnormality. Transport motor drive trouble
Causes:
Motor lock
Remedy:
Check transport motor operation with SIM3-3.
Code: F1 03
Description:
Sorter guide bar oscillation motor trouble. Sorter guide bar oscillation motor drive abnormality
Causes:
Motor lock. Motor rotation abnormality. Overcurrent to motor Sorter control PWB abnormality
Remedy:
Check the guide bar motor operation with SIM3-3.

Code: F1 04
Description:
Finisher 1 elevator lower limit detection/ Finisher 2 stack tray lower limit detection. When the bin is shifted, the upper limit or the lower limit sensor is detected. / The elevator exceeds the lower limit.
Causes:
Sensor defective Sorter/finisher control PWB abnormality
Remedy:
Check sensor with SIM3-2.
Code: F1 05
Description:
Finisher 1 elevator home / Finisher 2 stack tray sensor abnormality. The elevator does not detect the home position. / Stack tray sensors are turned on in the abnormal combination.
Causes:
Sensor defective Sorter/finisher control PWB abnormality
Remedy:
Check sensor with SIM3-2.
Code: F1 06
Description:
Finisher shift motor abnormality. 1) Bin shift is not completed within 2.5 seconds after bin shift request
Causes:
Motor lock Improper motor speed Overcurrent to motor Finisher control PWB defective
Remedy:
Check bin shift motor operation with SIM3-4.
Code: F1 08
Description:
Finisher staple shift motor trouble. Staple motor drive trouble
Causes:
Motor lock Motor rpm abnormality Overcurrent to motor Finisher control PWB trouble
Remedy:
Check the operation of the staple motor with SIM 3-3.
Code: F1 10
Description:
Finisher staple unit operation trouble. Staple operation trouble
Causes:
Motor lock Motor rpm abnormality Motor overcurrent Finisher control PWB trouble
Remedy:
Check the staple motor operation with SIM 3-3.
Code: F1 11
Description:
Finisher 1 pusher motor trouble / Finisher 2 boomerang rotation abnormality. Pusher motor trouble / Paddle solenoid abnormality
Causes:
Motor lock / paddle solenoid operation abnormality / boomerang rotation sensor abnormality Motor rpm abnormality Motor overcurrent Finisher control PWB abnormality
Remedy:
Check the finisher motor operation, the paddle solenoid operation with SIM 3-3 or check the boomerang rotation sensor with SIM 3-2.
Code: F1 14
Description:
Finisher 2 stack tray abnormality. Stack tray control sensor abnormality
Causes:
The paper surface sensor and the full stack sensor do not turn on even when a certain time is passed after starting the tray.
Remedy:
Check the sensor operation with SIM 3-2.
Code: F1 15
Description:
Finisher 1 elevator motor trouble / Finisher 2 stack tray motor lock. Elevator motor trouble
Causes:
Motor lock Motor rpm abnormality Motor overcurrent Finisher control PWB trouble
Remedy:
Check the elevator motor operation with SIM 3-3.
Code: F1 16
Description:
Staple sorter holding motor trouble. During rotation of the holding motor, the rotation pulse is not detected for 0.05sec or more.
Causes:
Motor lock. Motor rotation abnormality. Overcurrent to motor Sorter control PWB abnormality
Remedy:
Check the holding motor operation with SIM3-3.
Code: F1 17
Description:
ST pressure release hp trouble. ST paper exit roller pressure release trouble when turning on the power/initializing
Causes:
ST paper exit roller pressure release clutch abnormality ST paper exit roller pressure release clutch hp sensor abnormality
Remedy:
Stop the transport motor in SIM 3-3, turn on the STORCL to check that the pressure release roller operates. Check the STORhp sensor with SIM 3-2.
Code: F1 18
Description:
Tray 3 paper exit paddler operation trouble. Tray 3 paper exit paddler operation trouble when turning on the power/initializing
Causes:
Tray 3 paper exit paddler solenoid abnormality Tray 3 paper exit paddler hp sensor abnormality Finisher control PWB trouble
Remedy:
Operate the transport motor with SIM 3-3 and turn on T3PDSL to check that tray 3 paddler operates. Check T3PDhp sensor with SIM 3-2.
Code: F1 50
Description:
Non-support trouble in automatic detection of option connection (Sorter, finisher). In automatic detection of option connection, a non-support finisher or a sorter is detected.
Causes:
A non-support finisher or a sorter is connected to the copier.
Remedy:
Check the finisher or the sorter.
Code: F1 80
Description:
Finisher power not supplied. 24V power is not supplied to the finisher PWB.
Causes:
Connector harness improper connection or disconnection Finisher control PWB trouble Power unit trouble
Remedy:
Check the sensor operation with SIM 3-2.
Code: F2 00
Description:
Toner control sensor output open
Causes:
Connector harness trouble Connector unconnected.
Remedy:
Check connection of the toner control sensor. Check connection of the connector harness with the main PWB. Check for disconnection of the harness.
Code: F2 02
Description:
Toner motor connector unconnected. Connection detection signal with toner motor is OFF
Causes:
Connector harness defective Connector disconnected
Remedy:
Check toner motor connector for connection. Check connector harness to main PWB for connection. Check harness for broken wire.
Code: F2 31
Description:
Process control trouble (OPC drum surface reflection rate abnormality) Detail Usually the sensor gain is adjusted so that the output is a certain value, by reading the drum base surface with the image density sensor before starting process control. However, a certain output is not obtained by adjusting the sensor gain.
Causes:
Image density sensor defective
Remedy:
Check process control sensor output with SIM44-2. (Do not adjust) If the result is far different from the specified value, it suggests the sensor is defective. Check the sensor and harness. If the deviation is relatively small, check the sensor and drum surface for contamination.

Code: F2 32
Description:
Process control trouble (Drum marking scanning trouble). Usually the sensor gain is adjusted so that the output is a certain value, by reading the drum base surface with the drum marking sensor before starting process control. However, a certain output is not obtained by adjusting the sensor gain.
Causes:
Drum marking sensor defective Improper connection of harness between PCU PWB and drum marking sensor Drum marking sensor contaminated OPC drum cleaning improper Charging voltage improper
Remedy:
Check process control output with SIM44-02. (Do not adjust.) If the result is far different from the specified value, it suggests the sensor is defective. Check the sensor and harness. If the deviation is relatively small, check the sensor and drum surface for contamination.
Code: F2 37
Description:
Drum marking sensor gain adjustment error. When the drum marking area surface is scanned with the drum marking sensor before starting process control and the sensor gain is adjusted until a constant output is provided, the output is not constant though the sensor gain is changed.
Causes:
Drum marking sensor trouble Improper connection between PCU PWB and drum marking sensor Drum marking sensor is dirty OPC drum cleaning trouble
Remedy:
Perform the gain adjustment of process control sensor with SIM 44-2. If ERROR is displayed, it may be a breakdown. Check the sensor and the harness. When the adjustment is completed, check the drum surface conditions.
Code: F2 39
Description:
Process thermistor breakdown. The process thermistor is open.
Causes:
Process thermistor abnormality Improper connection of the process thermistor bar PCU PWB abnormality
Remedy:
Check connection of the process thermistor harness and connector. Check the PCU PWB.
Code: F3 12
Description:
Copier top stage CS lift up trouble. UPED does not turn on within the specified time. ULUD does not turn on within the specified time.
Causes:
UPED or ULUD defective Upper cassette lift-up motor defective Improper connection of harness between PCU PWB, lift-up unit, and paper feed unit.
Remedy:
Check UPED, ULUD and their harness and connector. Check lift-up unit.
Code: F3 22
Description:
Copier bottom stage CS lift up trouble. LPED does not turn on within the specified time. LLUD does not turn on within the specified time.
Causes:
LPED or LLUD defective Lower cassette lift-up motor defective Improper connection of harness between PCU PWB, lift-up unit, and paper feed unit.
Remedy:
Check LPED, LLUD, their harnesses and connectors. Check lift-up unit.
Code: F9 00
Description:
Printer communication trouble (ICU detection). Communication setup error, framing/parity/protocol error
Causes:
Slave unit PWB connector improper connection Slave unit PWB – ICU PWB harness trouble Connector pin breakage of the motor PWB of the slave unit PWB Slave unit ROM trouble. no ROM, ROM reverse insertion, ROM pin breakage
Remedy:
Connect the connector of the slave unit PWB and the ICU PWB. Check the connection and the harness. Check the grounding of the copier. Check the ROM of the slave unit PWB.
Code: F9 01
Description:
PRT DRAM trouble. Option printer PWB DRAM trouble (Check when turning on the power.)
Causes:
DRAM module is broken and access cannot be made. DRAM module improper installation
Remedy:
Check with SIM 67-1.
Code: F9 03
Description:
Network card trouble. Network card self test trouble.
Causes:
Network card defecft. Printer PWB defect. Network card connector connection defect.
Remedy:
Check the Network card connector. Replace the printer PWB. Replace the Network card.
Code: F9 04
Description:
Printer program error. Program data trouble in the option printer board.
Causes:
Flash memory data is destroied.
Remedy:
Replace or rewrite the Flash memory. Replace the printer PWB.
Code: F9 10
Description:
PRT SCSI LSI abnormality. An error occurred in SCSI communication with the option printer board.
Causes:
SCSI LSI abnormality ISU PWB abnormality SCSI connector improper connection
Remedy:
Replace the printer PWB. Check the SCSI connector. Replace the ISU PWB.
Code: F9 90
Description:
Printer communication trouble (PRT detection). Communication setup error/framing/parity/protocol error
Causes:
Slave unit PWB connector improper connection Slave unit PWB – ICU PWB harness trouble Slave unit PWB mother board connector pin breakage
Remedy:
Check the slave unit PWB and the ICU PWB connector connection. Check the copier earth.
Code: FC 00
Description:
ASK/IrDA modulation LSI reset error. Though the RESET signal pulse is sent to the ASK/IrDA modulation LSI, the power signal is not turned ON.
Causes:
1) ICU main PWB defect 2) ASK/IrDA modulation LSI/Clock oscillator defect
Remedy:
Perform the self diag with SIM 68-01. Replace the ICU main PWB.
Code: FC 01
Description:
ASK/IrDA switch error. Though the ASK/IrDA switch command is sent to the ASK/IrDA modulation LSI, the AI signal is not changed.
Causes:
1) ICU main PWB defect 2) ASK/IrDA modulation LSI/Clock oscillator defect
Remedy:
Perform the self diag with SIM 68-01. Replace the ICU main PWB.
Code: H2 00, H2 HL1
Description:
Thermister open Fusing unit not installed. Thermister is open (more than 4.6-V input voltage is detected). Fusing unit not installed
Causes:
Thermister defective Control PWB defective Improper connection of fusing connector AC power supply defective Fusing unit not installed
Remedy:
Check harness and connector between thermister and control PWB. Clear the display of self-diagnostics with SIM14.
Code: H2 01, H2 HL2
Description:
Thermister open Fusing unit not installed. Thermister is open (more than 4.6-V input voltage is detected). Fusing unit not installed
Causes:
Thermister defective Control PWB defective Improper connection of fusing connector AC power supply defective Fusing unit not installed
Remedy:
Check harness and connector between thermister and control PWB. Clear the display of self-diagnostics with SIM14.
Code: H3 00, H3 HL1
Description:
Heat roller high temperature detection. The fusing temperature is over 241.5°C (less than 1.3-V input voltage is detected.)
Causes:
Thermister defective Control PWB defective Improper connection of fusing unit connector AC power supply defective
Remedy:
Check heater lamp operation with SIM5-2. If lamp blinks properly: Check thermister and its harness. Check thermister input circuit of control PWB. If lamp lights and stays lit: Check lamp control circuits of AC PWB and control PWB. Clear the trouble with SIM14.