No.

Type

Error Name/Error Condition/Major Cause/Solution

SC520

 

D

Main motor error

  • The machine does not detect a main motor lock signal within 2 seconds after the main motor started to rotate.
  • The machine does not release a main motor lock signal within 2 seconds after the main motor switched off.
  • The machine detects a main motor lock signal every 100 msec. for seven times consecutively, after the main motor started to rotate stably.
  • Torque overload
  • Defective main motor
  • Disconnected or defective motor harness
  1. Turn the power OFF and ON.
  2. Replace the main motor if the torque load is normal.
  3. Clean/replace the AIO and/or fusing unit if the torque load is abnormal.
  4. Replace the motor harness.

No.

Type

Error Name/Error Condition/Major Cause/Solution

SC530

D

Cooling fan error

The FAN lock signal – High for 10 seconds, after the cooling fan motor started to rotate.
Disconnected or defective fan motor harness
  1. Turn the power OFF and ON.
  2. Replace the cooling fan.
  3. Replace the fan motor harness.

No.

Type

Error Name/Error Condition/Major Cause/Solution

SC541

A

Fusing thermistor error

The thermistor output is less than 0°C for 5 seconds after the fusing lamp turns ON.
Disconnected or defective fusing thermistor
  1. Reset the SC.
  2. Replace the fusing unit.
  3. Replace the drawer harness.

  4. Replace the PSU.

No.

Type

Error Name/Error Condition/Major Cause/Solution

SC542-01



A



Fuser reload error

The fusing temperature rises 6°C or less in 1.5 seconds; and this continues 5 times consecutively.

  • Defective or deformed thermistor
  • Incorrect power supply input at the main power socket
SC542-02


A


Fuser reload error
The fusing temperature has not reached 45°C within 9 seconds (after the fusing lamp comes ON while the machine is warming-up).
  • Defective or deformed thermistor
  • Incorrect power supply input at the main power socket
SC542-03


A


Fuser reload error
The fusing unit does not attain reload temperature within a predetermined time after the fusing temperature control starts.
  • Defective fusing lamp
  • The overheat protection mechanism started working
  
  1. Reset the SC.
  2. Replace the fusing unit.
  3. Replace the drawer harness.

  4. Replace the PSU.

No.

Type

Error Name/Error Condition/Major Cause/Solution

SC543

A

High temperature error (soft)

The detected temperature stays at 235°C for 0.5 second, and this consecutively occurs 10 times.
  • Defective main board
  • Defective PSU
  1. Reset the SC.
  2. Replace the main board.
  3. Replace the PSU.
  4. Replace the fusing unit.
  5. Replace the drawer harness.

No.

Type

Error Name/Error Condition/Major Cause/Solution

SC544

A

High temperature error (hard)

The detected temperature stays at 250°C for 0.2 second, and this consecutively occurs 4 times.
  • Defective main board
  • Defective PSU
  • Defective fusing unit
  1. Reset the SC.
  2. Replace the fusing unit.
  3. Replace the drawer harness.
  4. Replace the PSU.

No.

Type

Error Name/Error Condition/Major Cause/Solution

SC545

A

Fuser full heater error

The fuser full heater remained ON at full capacity for more than 9 seconds after the fusing temperature attains reload temperature.
  • Deformed thermistor
  • Thermistor not in the correct position
  • Defective fusing lamp
  1. Reset the SC.
  2. Replace the fusing unit.
  3. Replace the drawer harness.
  4. Replace the PSU.

No.

Type

Error Name/Error Condition/Major Cause/Solution

SC546

D

Unstable fusing thermistor temperature

While the machine is warming-up or printing, the detected temperature stays at 100℃ or less than the target temperature for 5.2 seconds, and this consecutively occurs 104 times.

Unstable connector contact of fusing thermistor

None

No.

Type

Error Name/Error Condition/Major Cause/Solution

SC547

D

Zero cross error

  • The zero cross signal is detected 3 times even though the fusing lamp relay is off when turning on the main power.
  • The number of zero cross signal interrupts do not reach a specified value during frequency detection.
  • The zero cross signal is not detected for 3 seconds even though the fusing lamp relay is on.
  • Defective fusing relay
  • Defective fusing relay circuit
  • Unstable frequency of the power supply line
  1. Check the power supply source.
  2. Replace the PSU

No.

Type

Error Name/Error Condition/Major Cause/Solution

SC551

A

Non-contact thermistor error

The thermistor output is less than 0°C for 5 seconds after the fusing lamp turns ON.
Disconnected or defective non-contact thermistor
  1. Reset the SC.
  2. Replace the fusing unit.
  3. Replace the drawer harness.

  4. Replace the PSU.

No.

Type

Error Name/Error Condition/Major Cause/Solution

SC552

 

A

Fuser reload error (non-contact thermistor)

The fusing temperature rises 1°C or less in 1.5 seconds; and this continues 5 times consecutively.

  • Defective or deformed non-contact thermistor
  • Incorrect power supply input at the main power socket
  1. Reset the SC.
  2. Replace the fusing unit.
  3. Replace the drawer harness.

  4. Replace the PSU.

No.

Type

Error Name/Error Condition/Major Cause/Solution

SC553

A

High temperature error (soft) (non-contact thermistor)

The detected temperature stays at 220°C for 0.5 second, and this consecutively occurs 10 times.
  • Defective main board
  • Defective PSU
  1. Reset the SC.
  2. Replace the main board.
  3. Replace the PSU.
  4. Replace the fusing unit.
  5. Replace the drawer harness.

No.

Type

Error Name/Error Condition/Major Cause/Solution

SC554

A

High temperature error (hard) (non-contact thermistor)

The detected temperature stays at 228°C for 0.2 second, and this consecutively occurs 4 times.
  • Defective main board
  • Defective PSU
  • Defective fusing unit
  1. Reset the SC.
  2. Replace the fusing unit.
  3. Replace the drawer harness.
  4. Replace the PSU.

No.

Type

Error Name/Error Condition/Major Cause/Solution

SC557

B

Zero-crossing frequency exceeded

The number of zero cross signal interrupts do not reach a specified value during frequency detection.

  • Unstable frequency of the power supply line
None

No.

Type

Error Name/Error Condition/Major Cause/Solution

SC559

A

Fuser 3 times jam error

The paper jam counter for the fusing unit reaches 3. The paper jam counter is cleared if the paper is fed correctly.

  • Defective fusing unit
  • Defective fusing control

This SC is activated only when this function is enabled with "SC559 Detection" in "Engine Maintenance" (default "OFF").

Turn off this function after a jam removal.

No.

Type

Error Name/Error Condition/Major Cause/Solution

SC580

A

Environment thermistor error

The thermistor output is less than 0°C for 5 seconds after the fusing lamp turns ON.
Disconnected or defective environment thermistor
  1. Reset the SC.

  2. Replace the environment thermistor.