442

D

Transfer belt contact motor error

The transfer belt HP sensor detects incorrect movement of the transfer belt after the transfer belt contact motor has turned on.

 Dirty transfer belt HP sensor

 Defective transfer belt contact motor

 Disconnected connector of the transfer belt HP sensor or motor

 Disconnected cable

 Defective IOB

501

B

1st tray lift malfunction

The tray lift sensor is not activated after the tray lift motor has been on for 10 seconds. If the main power switch is turned on when the paper is already at the feed height, the paper height position is detected again. At this time, the tray lift sensor should de-activate within 1.5 sec after the paper bottom plate starts to drop. If it does not deactivate within 1.5 sec., a message will prompt the user to reset Tray 1. After two attempts to release the error by re-setting the paper tray, if this does not solve the problem then this SC is displayed.

 An obstruction (jammed paper, paper scraps, etc.) has blocked the motor drive and caused an overload.

 Tray lift sensor connection loose, disconnected, or damaged

 Tray lift sensor defective

 Tray lift motor connection loose, disconnected, or damaged

 Tray lift motor defective

502

B

2nd tray lift malfunction

The tray lift sensor is not activated after the tray lift motor has been on for 10 seconds. If the main power switch is turned on when the paper is already at the feed height, the paper height position is detected again. At this time, the tray lift sensor should de-activate within 1.5 sec. after the paper bottom plate starts to drop. If it does not deactivate within 1.5 sec., a message will prompt the user to reset Tray 2. After two attempts to re-set the paper tray, if this does not solve the problem then this SC is displayed.

 An obstruction (jammed paper, paper scraps, etc.) has blocked the motor drive and caused an overload.

 Tray lift sensor connection loose, disconnected, or damaged

 Tray lift sensor defective

 Tray lift motor connection loose, disconnected, or damaged

 Tray lift motor defective

503

B

3rd tray lift malfunction (optional paper feed unit or LCT)

-01

-

For the paper feed unit:

 SC 503-01 occurs if the lift sensor does not turn on within 10 seconds after the tray lift motor has turned on.

For the LCT:

 SC 503-01 occurs if the lift sensor does not turn on or turn off within 8 seconds after the tray lift motor has turned on to lift or lower the tray.

For the paper feed unit:

 Defective tray lift motor or connector disconnection

 Defective lift sensor or connector disconnection

For the LCT:

 Defective stack transport clutch or connector disconnection

 Defective tray motor or connector disconnection

 Defective end fence home position sensor or connector disconnection

 Defective upper limit sensor or connector disconnection

 Defective tray lift motor or connector disconnection

-02

-

This SC is generated if the following condition occurs 3 consecutive times.

For the paper feed unit:

 When the tray lowers, the tray lift sensor does not go off within 1.5 sec.

For the LCT:

 When the main switch is turned on or when the LCT is set, if the end fence is not in its position (home position sensor ON), the tray lift motor stops.

 If the upper limit does not go off for 1.5 seconds even the tray lift motor turns on to lower the tray after the upper limit has been detected at power on.

For the paper feed unit:

 Defective tray lift motor or connector disconnection

 Defective lift sensor or connector disconnection

For the LCT:

 Defective stack transport clutch or connector disconnection

 Defective tray motor or connector disconnection

 Defective end fence home position sensor or connector disconnection

504

B

4th tray lift malfunction (optional paper feed unit or LCT)

For the two-tray paper feed unit:

 When the tray lift motor is turned on, the upper limit is not detected within 15 seconds. If this condition occurs three consecutive times, the SC is generated.

 When the tray lowers, the tray lift sensor does not go off within 1.5 sec.

For the LCT:

 After the job is finished, if the end fence is not in the home position (home position sensor ON), the tray lift motor stops.

 When the main switch is turned on or when the paper feed unit is set, if the end fence is not in the home position (home position sensor ON), the tray lift motor stops. If this condition occurs three consecutive times, the SC is generated.

 If the upper or lower limit is not detected within 8 seconds when the tray lift motor is turned on to lift up or lower the tray.

 When the tray lowers, the tray lift sensor does not go off within 1.5 sec.

For the paper feed unit:

 Defective tray lift motor or connector disconnection

 Defective lift sensor or connector disconnection

For the LCT:

 Defective tray lift motor or connector disconnection

 Defective lift sensor or connector disconnection

505

B

5th tray lift malfunction (optional LCT)

For the two-tray paper feed unit:

 If the upper limit of the LCT 1200-sheet is not detected within 8 seconds when the tray lift motor is turned on to lift up the tray.

 When the tray lowers, the tray lift sensor does not go off within 1.5 sec.

For the LCT:

 If the upper limit of the LCT 1200-sheet is not detected within 8 seconds when the tray lift motor is turned on to lift up or lower the tray.

 The tray lift sensor of the LCT 1200-sheet does not go off within 1.5 seconds when the tray lowers. If this condition occurs three consecutive times, the SC is generated.

 Tray lift motor defective or disconnected

 Upper limit sensor defective or disconnected

530

D

Fusing exhaust fan motor error

The IOB does not receive the lock signal for10 seconds after turning on the fusing exhaust fan.

 Defective fusing exhaust fan motor or connector disconnection

 Defective IOB

 Disconnected harness

531

D

Exhaust fan motor error

The IOB does not receive the lock signal for 10 seconds after turning on the exhaust fan motor.

 Defective exhaust fan motor or connector disconnection.

 Defective IOB

 Disconnected harness

532

D

Cooling fan motor error

The machine does not detect the fan motor lock signal for 10 seconds after turning on the cooling fan motor.

 Defective cooling fan motor or connector disconnection.

 Disconnected harness

 Defective IOB

533

D

Paper exit cooling fan motor error

The machine does not detect the fan motor lock signal for 10 seconds after turning on the paper exit cooling fan motor.

 Defective paper exit cooling fan motor or connector disconnection.

 Defective IOB

 Disconnected harness

540

D

Fusing motor error

The IOB does not receive the lock signal for 2 seconds after turning on the fusing motor.

 Motor overload

 Defective fusing motor or connector disconnection.

 Defective IOB

 Disconnected harness

541

A

Fusing thermistor open (center)

The thermistor (center) detects 0°C or less for 5 sec.

 Fusing thermistor disconnected

 Fusing thermistor connector defective

542

A

Fusing temperature warm-up error(center)

This SC is generated if the following condition occurs:

 The thermistor (center) does not detect an 8°C increment in the fusing temperature for 1.5 sec. just after the fusing temperature reached 45°C.

 The temperature of the center thermistor does not reach the target temperature for 28 seconds after the fusing lamps turned on.

 Thermistor warped or broken

543

A

Fusing overheat error 1 (software detection)

A fusing temperature (at the center) of over 230°C (446°F) is detected for 1 second by the fusing thermistors at the center or at either end of the fusing roller.

 Power supply unit defective

 I/O board (IOB) defective

 BCU defective

 TRIAC short on PSU (PSU defective)

544

A

Fusing overheat error 1 (hardware detection)

A fusing temperature (at the center) over 250°C is detected by the fusing temperature monitor circuit in the BCU board.

 I/O board (IOB) defective

 BCU defective

545

A

Fusing lamp consecutive full power 1

After warm-up the fusing lamp remains at full power for 15 seconds without the hot roller rotating.

 Disconnected or defective thermistors (center)

 Defective fusing lamp

547

D

Zero cross error

 The zero cross signal is detected three times even though the heater relay is off when turning on the main power.

 The zero cross signal is not detected for 2 seconds even though the heater relay is on after turning on the main power or closing the front door.

 The detection error occurs twice or more in the 11 zero cross signal detections. This error is defined when the detected zero cross signal is less than 45.

 Defective fusing lamp relay

 Defective fusing lamp relay circuit

 Unstable power supply

551

A

Fusing thermistor open (end)

The thermistor (end) detects 0°C or less for 5 sec.

 Fusing thermistor (end) disconnected

 Fusing thermistor (end) connector defective

552

A

Fusing temperature warm-up error (end)

This SC is generated if the following condition occurs:

 The thermistor (end) does not detect an 8°C increment in the fusing temperature for 1.5 sec. just after the fusing temperature reached 45°C.

 The temperature of the end thermistor does not reach the target temperature for 31 seconds after the fusing lamps turned on.

 Thermistor warped or broken

553

A

Fusing overheat error 1 (software detection)

A fusing temperature (at the end) of over 230°C (446°F) is detected for 1 second by the fusing thermistors at the center or at either end of the fusing roller.

 Power supply unit defective

 I/O board (IOB) defective

 BCU defective

 TRIAC short on PSU (PSU defective)

554

A

Fusing overheat error 1 (hardware detection)

A fusing temperature (at the end) over 250°C is detected by the fusing temperature monitor circuit in the BCU board.

 I/O board (IOB) defective

 BCU defective

555

A

Fusing lamp consecutive full power 1

After warm-up, the fusing lamp remains at full power for 40 seconds without the hot roller rotating.

 Disconnected or defective thermistors (ends)

 Defective fusing lamp

557

C

Zero cross frequency error

When the zero cross signal is 66 or more and it is detected 10 times or more in 11 detections, the machine determines that input 60 Hz and SC557 occurs.

 Noise (High frequency)

559

A

Fusing unit jam

The fusing sensor detected a fusing unit paper late jam three times. The paper was late and the fusing exit sensor could not detect the paper three times.

 Remove the paper that is stopped in the fusing unit.

 Check that the fusing unit is clean and has no obstacles in the paper feed path.

 If the error persists, replace the fusing unit.