No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
498 C Temperature and humidity sensor error
• The thermistor output of the temperature sensor was not within the prescribed
range (0.2V to 3.5V).
• The thermistor output of the humidity sensor was not within the prescribed
range (0.01V to 2.4V).
• Temperature and humidity sensor harness disconnected, loose, defective
• Temperature and humidity sensor defective
1. Check the connector and harness.
2. Replace the temperature/humidity sensor.
SC5xx: Paper Feed and Fusing
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
501 B 1st paper tray lift motor malfunction
502 B 2nd paper tray lift motor malfunction (optional paper feed unit)
503 B 3rd paper tray lift motor malfunction (optional paper feed unit)
504 B 4th paper tray lift motor malfunction (optional paper feed unit)
- - The paper lift sensor did not activate within 18 sec. after the tray lift motor
switched on.
• An obstruction (jammed paper, paper scraps, etc.) has blocked the motor
drive and caused an overload.
• Paper lift sensor connection loose, disconnected, or damaged
• Paper lift sensor defective
• Tray lift motor connection loose, disconnected, or damaged
• Tray lift motor defective
1. Check or replace the harness.
2. Replace the tray lift motor.
3. Replace the BCU.
SC Tables
581
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