Description: Upper paper tray lift motor malfunction (optional paper tray units)
The paper lift sensor fails to activate twice continuously after the tray lift motor has been on for 18 seconds.
Causes: • Paper lift sensor defective • Tray lift motor defective • Too much load on the drive mechanism • Poor tray lift motor connection
Code: 504
Description: Lower paper tray lift motor malfunction (optional two-tray paper tray unit)
The paper lift sensor fails to activate twice continuously after the tray lift motor has been on for 18 seconds.
Causes: • Paper lift sensor defective • Tray lift motor defective • Too much load on the drive mechanism • Poor tray lift motor connection
Code: 506
Description: Paper feed motor lock (optional paper tray units)
A motor lock signal is not detected for more than 1.5 s or the lock signal is not detected for more than 1.0 s during rotation.
Causes: • Paper feed motor defective • Too much load on the drive mechanism
Code: 541
Description: Fusing thermostat/thermistor open
The fusing temperature detected by the thermistor is below 10°C for 5 seconds after the main power switch is turned on.
Causes: • Fusing thermostat defective or out of position • Fusing thermistor defective or out of position • Power supply board defective
Code: 542
Description: Fusing temperature warm-up error
The fusing temperature does not reach 80°C within 30 seconds after the main switch is turned on.
Causes: • Fusing thermistor defective or out of position • Fusing lamp open • Fusing thermostat open • Fusing thermofuse open • Power supply board defective
Code: 543
Description: Fusing overheat error
A fusing temperature of over 230°C is detected for 1 second by the fusing thermistor.
Causes: • Fusing thermistor defective • Power supply board defective