• Code: SC504
• Description: Tray 4 lift motor error (optional paper tray unit only) -Definition- [C] The paper upper limit sensor is not activated after the tray lift motor has been on for 13 seconds.
• Causes: · Upper limit sensor defective · Tray lift motor defective · BECU board defective

• Code: SC506
• Description: Paper tray unit main motor error (optional paper tray unit only) -Definition- [C] 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: SC507
• Description: LCT motor error (optional LCT only) -Definition- [C] The paper upper limit sensor is not activated after the tray motor has been on to lift up the tray for 23 seconds, or the paper lower limit sensor is not activated after the tray motor has been on to lower the tray for 17 seconds.
• Causes: · Upper limit sensor defective · Lower limit sensor defective · Tray motor defective · BECU board defective

• Code: SC542
• Description: Fusing temperature warm-up error -Definition- [A] The fusing temperature does not reach the fusing standby temperature within 60 seconds after the main switch is turned on or after the covers have been closed. Or, during warming-up, the fusing temperature does not change by at least 2 °C within 6 seconds.
• Causes: · Fusing thermistor defective or out of position · Fusing lamp open · Fusing thermofuse open · Power supply board defective · Poor fusing unit connection · BECU board defective

• Code: SC543
• Description: Fusing overheat error -Definition- [A] A fusing temperature of over 230°C is detected for 1 second by the fusing thermistor. A fusing temperature of over 250°C is detected for 3 seconds by the fusing edge thermistor during printing.
• Causes: · Fusing thermistor defective · Fusing edge thermistor defective · Power supply board defective

• Code: SC544
• Description: Fusing low temperature error -Definition- [A] A fusing temperature of lower than 100°C is detected for 1 second by the fusing thermistor.
• Causes: · Fusing thermistor defective · Power supply board defective

• Code: SC547
• Description: Zero cross signal malfunction -Definition- [A] Zero cross signals are not detected within a certain period.
• Causes: · Power supply board defective · BECU board defective

• Code: SC696
• Description: Communication error between finisher and BECU (optional finisher only) -Definition- [B] The BECU board cannot communicate with the finisher properly.
• Causes: · Poor connection of the interface cable for the finisher · BECU board defective · Finisher drive board defective