Description: Upper tray lift motor malfunction (optional paper tray unit only)
The paper upper limit sensor is not activated after the tray lift motor has been on for 10 seconds.
Causes: • Upper limit sensor defective • Tray lift motor defective • IOCSS board defective for
Code: SC504
Description: Lower tray lift motor malfunction (optional paper tray unit only)
The paper upper limit sensor is not activated after the tray lift motor has been on for 10 seconds.
Causes: • Upper limit sensor defective • Tray lift motor defective • IOCSS board defective for
Code: SC506
Description: Paper tray unit main motor lock (optional paper tray unit only)
A main motor lock signal is detected for more than 5 seconds or the lock signal is not detected for more than 5 seconds during rotation.
Causes: • Paper tray unit main motor defective • Too much load on the drive mechanism
Code: SC542
Description: Fusing temperature warm-up error
The fusing temperature does not reach the fusing standby temperature within 50 seconds after the main switch is turned on.
Causes: • Fusing thermistor defective or out of position • Fusing lamp open • Fusing thermofuse open • Power supply board defective • Poor connection of the fusing unit
Code: SC543
Description: Fusing overheat error
A fusing temperature of over 231°C is detected for 1 second by the fusing thermistor.
Causes: • Fusing thermistor defective • Power supply board defective
Code: SC544
Description: Fusing low temperature error
A fusing temperature of lower 100°C is detected for 1 second by the fusing thermistor.
Causes: • Fusing thermistor defective • Power supply board defective