Description: ID sensor pattern error (K) The slope gM of the line representing the relationship between the DTM bias and attached toner amount is not between –0.01 and – 0.001.
Causes: Incorrect DTM installation, incorrect PCU installation, development bias error, MCU, LD control malfunction, loss of synchronization
Code: 20
Description: Optional tray unit error The detection signal for the 500 sheet paper tray unit is abnormal.
Causes: The optional tray unit connector has a bad connection.
Code: 21
Description: Pressure roller thermistor error The roller temperature has been at 0°C for five seconds.
Causes: Pressure roller thermistor, MCU
Code: 22
Description: High pressure roller temperature The roller temperature has been at 190°C or higher for three seconds.
Causes: Pressure roller thermistor, MCU
Code: 23
Description: Low pressure roller temperature Reheating has been done and the motor is not running, or 60 seconds have passed after the main motor halted. Then, the roller temperature has been below 130ºC for 60 seconds
Description: Hot roller thermistor error The roller temperature has been 0°C for five seconds.
Causes: Hot roller thermistor, MCU
Code: 25
Description: High hot roller temperature The roller temperature has been 190°C or higher for three seconds.
Causes: Hot roller thermistor, MCU
Code: 26
Description: Low hot roller temperature Reheat has been done and the motor is not running, or 60 seconds have passed after main motor halt. Then, the roller temperature has been below 130ºC for 60 seconds
Causes: Hot roller thermistor, MCU, hot roller lamp connector