Description: Tray 2 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: 503
Description: Tray 3 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: Tray 4 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 thermistor open (center)
The fusing temperature detected by the thermistor is below 71°C and is not corrected after the main power switch is turned on.
Causes: • Fusing thermistor defective or out of position • Power supply board defective • Loose connectors
Code: 542
Description: Fusing temperature warm-up error (center)
The fusing temperature rises less than 7 degrees in 2 seconds, and this continues 5 times consecutively. The fusing temperature is not detected in 25 or 35 seconds.
Causes: • Fusing thermistor defective or out of position • Fusing lamp open • Power supply board defective