Code: H3 01, H3 HL2
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.
Code: H4 00, H4 HL1
Description:
Heat roller low temperature detection. The temperature does not reach the preset value within the specified time (3 min. in usual modes; 5 min. in curl correction mode.) after the power relay is turned on.
Causes:
Thermister defective Heater lamp defective Control PWB defective Thermostat defective AC power supply defective Interlock switch defective
Remedy:
Check heater lamp for blinking with SIM5-2. If lamp blinks properly: Check thermister and its harness. Check thermister input circuit of control PWB. If lamp does not light: Check heater lamp for broken wire and thermostat for operation. Check interlock switch. Check lamp control circuit of AC PWB and control PWB. Clear the trouble with SIM14.
Code: H4 01, H4 HL2
Description:
Heat roller low temperature detection. The temperature does not reach the preset value within the specified time (3 min. in usual modes; 5 min. in curl correction mode.) after the power relay is turned on.
Causes:
Thermister defective Heater lamp defective Control PWB defective Thermostat defective AC power supply defective Interlock switch defective
Remedy:
Check heater lamp for blinking with SIM5-2. If lamp blinks properly: Check thermister and its harness. Check thermister input circuit of control PWB. If lamp does not light: Check heater lamp for broken wire and thermostat for operation. Check interlock switch. Check lamp control circuit of AC PWB and control PWB. Clear the trouble with SIM14.
Code: H5 01
Description:
3 continuous POD1 not-reaching JAM detection. 3 continuous POD1 not-reaching JAM detection
Causes:
Check that the fusing JAM is completely cancelled. (Jam paper may be remained.) POD1 sensor trouble or improper harness connection Improper installation of the fusing harness.
Remedy:
Check JAM paper in the fusing section. (Winding, etc.) Check POD1 sensor harness. Check the fusing unit installation. Cancel the trouble with SIM 14.
Code: H5 02
Description:
Fusing thermistor abnormality. Fusing thermistor temperature transient abnormality (Paper winding)
Causes:
Paper winding to fusing roller Fusing pawl abnormality Fusing unit installation abnormality
Remedy:
Check for jam (winding) paper in the fusing section. Check for installation of the fusing unit. Check the fusing pawl. Cancel the trouble with SIM 14.
Code: L1 00
Description:
Scanner feed trouble. Scanner feed is not finished within the specified time. (timer is change by magnification)
Causes:
Mirror unit defective Scanner wire disconnected
Remedy:
Check scanning operation with SIM1-1.
Code: L3 00
Description:
Scanner return trouble. Scanner return is not finished within the specified time. (timer is change by magnification)
Causes:
Mirror unit defective Scanner wire disconnected
Remedy:
Check scanning operation with SIM1-1.
Code: L4 01
Description:
Main motor lock detection. Motor lock signal is detected for 1.5 seconds during main motor rotation
Causes:
Main motor defective Improper connection of harness between PCU PWB and main motor Control circuit defective
Remedy:
Check main motor operation with SIM25-1. Check harness and connector between PCU PWB and main motor.

Code: L6 10
Description:
Polygon motor lock detection. It was judged that there is no output of polygon motor lock signal of LSU. The lock signal was checked at about 10-second intervals after the polygon motor started rotating. As result, it was judged that the polygon motor failed to operate normally.
Causes:
Disconnected connecter to LSU or detached harness inside LSU or broken wire. Polygon motor defective
Remedy:
Check polygon motor operation with SIM61-1. Check harness and connector for connection. Replace LSU if needed.
Code: L8 01
Description:
No full-wave signal. Full-wave signal is not detected.
Causes:
PCU PWB trouble Power unit trouble
Remedy:
Check connection of the harness and the connector. Replace the PCU PWB. Replace the power unit.
Code: L8 02
Description:
Full-wave signal frequency abnormality detected. (The detected frequency: 69Hz or above or 42.5Hz or below)
Causes:
Check for disconnection or improper connection of the connector of the PCU PWB and the power PWB harness. PCU PWB trouble Power unit trouble
Remedy:
Check connection of the harness and connector. Replace the power unit.
Code: PF 00
Description:
RIC copy inhibition command reception. Copy inhibition command received from RIC (host)
Causes:
Judged by the host.
Remedy:
Notice to the host
Code: U2 00
Description:
EEPROM version error. Error in writing into EEPROM.
Causes:
EEPROM defective Uninitialized EEPROM is installed Defective EEPROM access circuit on PCU PWB
Remedy:
Check EEPROM for proper set-up To prevent the erasure of counter data and adjustment values, write down the counter data and adjustment values by simulation. (If there is a printer option, execute SIM23-1 and note counter data/adjustment values.) Clear U2 trouble with SIM16. Replace PCU PWB.
Code: U2 11
Description:
Counter check sum error (EEPROM). Checksum error in counter data area
Causes:
EEPROM defective Control circuit hung up due to noise Defective EEPROM access circuit on PCU PWB
Remedy:
Check EEPROM for proper set-up To prevent the erasure of counter data and adjustment values, write down the counter data and adjustment values by simulation. (If there is a printer option, execute SIM23-1 and note counter data/adjustment values.) Clear U2 trouble with SIM16. Replace PCU PWB.
Code: U2 12
Description:
Adjustment value check sum error (EEPROM). Checksum error in adjustment value data area
Causes:
EEPROM defective Control circuit hung up due to noise. Defective EEPROM access circuit on PCU PWB
Remedy:
Check EEPROM for proper set-up To prevent the erasure of counter data and adjustment values, write down the counter data and adjustment values by simulation. (If there is a printer option, execute SIM23-1 and note counter data/adjustment values.) Clear U2 trouble with SIM16. Replace PCU PWB.
Code: U4 02
Description:
ADU alignment plate operation abnormality. The plate won’t move from home position more than 1 second after sending the command to leave home position. Or the plate won’t return to home position within 5 seconds after sending the command to return to home position.
Causes:
Home position sensor defective Alignment shift motor defective Improper connection of harness between PCU PWB, motor and sensor. Control PWB (PCU) defective Alignment plate driving belt or gear damaged or improperly adjusted
Remedy:
Check home position sensor detection with SIM9-2. Check alignment plate operation with SIM9-4. Check connection between PCU, motor and sensor. Remove ADU and check gear and belt for damage.

Code: U4 03
Description:
ADU rear edge plate operation abnormality. When the plate is not shifted from the home position for 1 sec or more or when returning to the home position is not detected for 5 sec or more.
Causes:
Home position sensor defect Rear edge plate shift motor defect Control PWB (PCU) defect Rear edge plate operation belt/gear damage or adjustment error
Remedy:
Check the home position sensor operation with SIM 9-21. Check the rear edge plate operation with SIM 9-31. Check between the PCU PWB, the motor, and the sensor. Remove the ADU and check the gear and the belt.
Code: U5 00
Description:
RADF/SPF/RSPF communication trouble. Communication line test error occurs when power is turned on or after the exit of a simulation mode. Improper communication with RADF
Causes:
Improper connection or broken wire of connector or harness RADF control PWB defective Control PWB (PCU) defective Malfunction due to noise
Remedy:
Check communication line connector and harness. Clear the trouble by turning power supply On/Off.
Code: U5 01
Description:
RADF resist sensor detection trouble
Causes:
Sensor defective Improper connection of sensor harness inside RADF. RADF control PWB defective
Remedy:
Check resist sensor detection with SIM2-2. Check sensor harness inside RADF.
Code: U5 02
Description:
RADF eject/inversion sensor detection trouble
Causes:
Defective sensor Improper connection of sensor harness inside RADF. RADF control PWB defective
Remedy:
Check eject/inversion sensor detection with SIM2-2. Check sensor harness inside RADF.
Code: U5 03
Description:
RADF timing sensor detection trouble
Causes:
Defective sensor Improper connection of sensor harness inside RADF RADF control PWB defective
Remedy:
Check timing sensor detection with SIM2-2. Check sensor harness inside RADF.
Code: U5 06
Description:
RSPF post-separation sensor detection trouble (in auto adjustment).
Causes:
Sensor trouble. Bad connection of sensor harness in RSPF. RSPF control PWB trouble. Erroneous detection by paper dust.
Remedy:
Check detection of post-separation sensor with SIM2-2. Check RSPF sensor harness. Clean and remove paper dust.
Code: U5 07
Description:
RSPF read sensor detection trouble (in auto adjustment)
Causes:
Sensor trouble. Bad connection of sensor harness in RSPF. RSPF control PWB trouble. Erroneous detection by paper dust.
Remedy:
Check detection of read sensor with SIM2-2. Check RSPF sensor harness. Clean and remove paper dust.
Code: U5 08
Description:
RSPF SB sensor detection trouble (in auto adjustment)
Causes:
Sensor trouble. Bad connection of sensor harness in RSPF. RSPF control PWB trouble. Erroneous detection by paper dust.
Remedy:
Check detection of SB sensor with SIM2-2. Check RSPF sensor harness. Clean and remove paper dust.

Code: U5 11
Description:
RADF paper feed motor operation abnormality. Paper feed motor driving error
Causes:
Motor lock Improper motor speed Overcurrent to motor RADF control PWB defective
Remedy:
Check paper feed motor operation with SIM2-3,4.
Code: U5 16
Description:
RSPF fan motor operation abnormality. An abnormality is detected by the input of RSPF fan motor alarm signal.
Causes:
Motor lock. RSPF control PWB trouble. Bad connection of RSPF motor harness.
Remedy:
Check the fan motor operation with SIM2-2.
Code: U6 00
Description:
Desk communication trouble. Failed communication with desk Communication line test error occurs when power is turned on or after the exit of a simulation mode.
Causes:
Improper connection or broken wire of connector or harness Desk control PWB defective Control PWB (PCU) defective Malfunction due to noise.
Remedy:
Clear the trouble by turning the power supply On/Off. Check communication line connector and harness.
Code: U6 01, U6 02, U6 03
Description:
Desk 1, 2, 3 CS lift-up trouble. Desk cassette lift-up trouble (1st - 3rd cassettes).
Causes:
Defective sensor RADF control PWB defective Broken gear Lift-up motor defective
Remedy:
Check lift-up sensor detection with SIM4-2. Check lift-up motor with SIM4-3.
Code: U6 08
Description:
Desk 24-V power abnormality. No supply of DC24V to desk
Causes:
Improper connection or broken wire of connector or harness Desk control PWB defective Power supply unit defective
Remedy:
Check power supply line connector and harness. Check 24-V voltage on power supply unit and desk control PWB.
Code: U6 09
Description:
LCC lift motor trouble
Causes:
Sensor trouble LCC control PWB trouble Gear breakage Lift motor trouble
Remedy:
Check the sensor detection with SIM 4-2. Check the lift motor operation with SIM 4-3.
Code: U6 10
Description:
Desk transport motor operation trouble
Causes:
Motor lock Improper motor speed Overcurrent to motor RADF control PWB defective
Remedy:
Check transport motor operation with SIM4-6.
Code: U6 20
Description:
LCC communication trouble Error when power is turned on or in communication line test after exiting SIM.
Causes:
Connector harness improper connection or disconnection LCC control PWB trouble Control PWB (PCU) trouble Malfunction by noise
Remedy:
Canceled by turning on the power. Check the connector and harness of the communication line.

Code: U6 21
Description:
LCC transport motor operation trouble
Causes:
Motor lock Motor rpm abnormality Motor overcurrent LCC control PWB trouble
Remedy:
Check the transport motor operation with SIM 4-3.
Code: U6 22
Description:
LCC 24V power abnormality. DC24V not supplied to LCC
Causes:
Connector harness improper connection or disconnection LCC control PWB trouble Power unit trouble
Remedy:
Check the connector and harness of power line. Check 24V power in the power unit and the LCC control PWB.
Code: U6 50
Description:
Non-support trouble in automatic detection of option connection (Desk unit). In automatic detection of option connection, a non-support desk unit is detected.
Causes:
A non-support desk unit is connected to the copier.
Remedy:
Check the desk unit.
Code: U6 51
Description:
Non-support trouble in automatic detection of option connection (LCC unit). In automatic detection of option connection, a non-support LCC unit is detected.
Causes:
A non-support LCC unit is connected to the copier.
Remedy:
Check the LCC unit.
Code: U7 00
Description:
RIC communication trouble. Communication error with RIC Error in communication line test after turning on the power or exiting from SIM.
Causes:
Improper connection or disconnection of connector and harness RIC control PWB trouble Control PWB (ICU) trouble Malfunction caused by noises
Remedy:
Turn off/on the power to cancel the trouble.
Code: U9 00
Description:
Operation control 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: U9 90
Description:
Operation control communication trouble (OPE 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.