Canon imageRUNNER ADVANCE C5500 Series Service Manual page 667

31-0051 -
A. Operation / B. Cause /
C. Remedy
31-0052 -
A. Operation / B. Cause /
C. Remedy
31-0053 -
A. Operation / B. Cause /
C. Remedy
31-0054 -
A. Operation / B. Cause /
C. Remedy
External Environment Sensor temperature upper limit detection alarm
Cause: External Temperature Sensor error (A temperature higher than the specified value was
detected.)
Detection condition/timing:
- Detection is always performed and an alarm occurs when a value that exceeds the threshold
value is detected.
Movement/symptom:
- While failure has occurred (an alarm has occurred), color displacement/density error, or toner
scattering inside the machine in the worst case may occur.
Measures:
1. Disconnect and then connect the connector of the Environment Sensor (UN50).
2. Disconnect and then connect the connector (J171) of the DC Controller PCB.
3. Check if the harness of the External Temperature Sensor is short circuit.
4. Replace the Environment Sensor (UN50).
5. Replace the DC Controller PCB.
External Environment Sensor temperature lower limit detection alarm
Cause: External Temperature Sensor error (A temperature lower than the specified value was
detected.)
Detection condition/timing:
- Detection is always performed and an alarm occurs when a value that exceeds the threshold
value is detected.
Movement/symptom:
- While failure has occurred (an alarm has occurred), color displacement/density error, or toner
scattering inside the machine in the worst case may occur.
Measures:
1. Disconnect and then connect the connector of the Environment Sensor (UN50).
2. Disconnect and then connect the connector (J171) of the DC Controller PCB.
3. Check if the harness of the Environment Sensor is open circuit.
4. Replace the Environment Sensor (UN50).
5. Replace the DC Controller PCB.
External Environment Sensor humidity upper limit detection alarm
Cause: External Temperature Sensor error (A temperature higher than the specified value was
detected.)
Detection condition/timing:
- Detection is always performed and an alarm occurs when a value that exceeds the threshold
value is detected.
Movement/symptom:
- While failure has occurred (an alarm has occurred), color displacement/density error, or toner
scattering inside the machine in the worst case may occur.
Measures:
1. Disconnect and then connect the connector of the Environment Sensor (UN50).
2. Disconnect and then connect the connector (J171) of the DC Controller PCB.
3. Check if the harness of the Environment Sensor is open circuit.
4. Replace the Environment Sensor (UN50).
5. Replace the DC Controller PCB.
Internal Environment Sensor temperature upper limit detection alarm
Cause: Internal Temperature Sensor error (A temperature was higher than the specified value.)
Detection condition/timing:
- Detection is always performed and an alarm occurs when a value that exceeds the threshold
value is detected.
Movement/symptom:
- While failure has occurred (an alarm has occurred), color displacement/density error, or toner
scattering inside the machine in the worst case may occur.
Measures:
1. Disconnect and then connect the connector of the Internal Temperature Sensor (UN22).
2. Disconnect and then connect the connector (J171) of the DC Controller PCB.
3. Check if the harness of the Internal Temperature Sensor is short circuit.
4. Replace the Internal Temperature Sensor (UN22).
5. Replace the DC Controller PCB.
653
7. Error/Jam/Alarm