SC 5xx (Motor and Fusing Error)

SC500

Transport/Fusing Motor Error

The LOCK signal error is detected when the EGB monitors the transport/fusing motor state. (This monitoring is done immediately after power-on, when the motor starts rotating, and immediately after the motor stops.)

• Disconnected or defective motor harness.
• Motor slips due to excessive load
  
  1. Check the harness from the transport/fusing motor. Replace it if necessary.

SC530

LSU Fan Motor Error

A LOCK signal is not detected for more than ten seconds while the motor START signal is on and if this error occurs twice consecutively, this SC is issued.

• Disconnected or defective motor harness.
• Defective LSU fan motor
  
  1. Check or replace the motor harness.
  2. Replace the LSU fan motor.

SC531

Fusing Fan Motor Error

A LOCK signal is not detected for more than ten seconds while the motor START signal is on and if this error occurs twice consecutively, this SC is issued.

• Disconnected or defective motor harness.
• Defective LSU fan motor
  
  1. Check or replace the motor harness.
  2. Replace the fusing fan motor.

SC541

Thermistor Error

The thermistor output is less than 0°C for 7 seconds.

• Disconnected thermistor
• Defective harness connection
  
  1. Check the harness connection of the thermistor.
  2. Replace the fusing unit.

SC542

Print Ready Temperature Error

• The heating roller temperature increase during a set time is not correct.
• The fusing temperature does not reach the print ready temperature within a set time after the fusing lamp has turned on.

• Defective thermistor
• Incorrect power supply input at the main power socket
• Defective fusing lamp
  
  1. Check the voltage of the wall outlet.
  2. Replace the fusing unit
  3. Replace the fusing lamp.

SC543

High Temperature Detection Error

This SC is issued if one of following conditions occurs:

• The thermistor (center) detects 255°C or thermistor (end) detects 245°C.
• The thermistor (center) detects a 3°C increment or more for five seconds at 220°C or more or the thermistor (end) detects a 4°C increment or more for five seconds at 210°C or more.

• Defective I/O control (EGB)
• Defective EGB
  
  1. Replace the EGB

SC545

Heating Lamp Full-Power Error

The fusing lamp is fully-powered for a certain time while the fusing unit stays in the stand-by mode and is not rotating.

• Deformed thermistor
• Thermistor not in the correct position
• Defective fusing lamp
  
  1. Replace the fusing unit.
  2. Replace the fusing lamp.

SC547

Zero Cross Error

The zero cross signal is not detected for three seconds even though the fusing lamp relay is on after turning on the main power or closing the front door.

• Defective fusing lamp relay
  
  1. Turn the main power switch off and on.

SC548

Low Temperature Error

The center thermistor detects 100°C or less for 4 seconds.

• Defective fusing lamp
• Defective thermistor
  
  1. Replace the fusing unit.
  2. Replace the fusing lamp.

SC557

Zero Cross Frequency Error

The detection error occurs ten times consecutively in ten zero cross signal detections. This error is defined when the detected zero cross signal is 17 or less/27 or more for 0.2 seconds.

• Defective fusing lamp relay
• Unstable input power source
  
  1. Check the power supply source.
  2. Replace the fusing unit.
  3. Turn the main power switch off and on.

SC559

Consecutive Fusing Jam

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

This SC is activated only when this function (Fuser SC Detect) is enabled with the SP mode (default "OFF").

• Defective fusing unit
• Defective fusing control
  
  1. Clear this SC to send a command after a jam removal.
  2. Turn off this function after a jam removal.