Canon imageRUNNER ADVANCE 4551i Service Manual page 535

04-1539 -
A. Operation / B. Cause /
C. Remedy
04-1542 -
A. Operation / B. Cause /
C. Remedy
04-1543 -
A. Operation / B. Cause /
C. Remedy
Paper Surface Sensor alarm
Cause:
- Deck Lifter Motor alarm
- The lifter cannot be raised.
Detection condition/timing: The Paper Surface Sensor was not turned ON within the specified
period of time when raising the lifter.
Movement/symptom:
While failure has occurred (an alarm has occurred), the target paper source cannot be used
because it is in no paper state.
Measures:
- Forcibly open the receptacle.
- Check that the Lifter Plate is not caught by the Side Guide.
- Remove the Front Cover, and check that the lifter wire is properly installed (no coming off,
disconnection, slack, or winding in the reverse direction).
- Remove the Deck Right Cover.
- Execute service mode: COPIER>FUNCTION>CLEAR>DK-RCV.
- Close the receptacle, and check if the Lifter Plate is raised from the right side.
1) If it is not raised:
- If it is not raised and no motor drive sound is heard, check for improper connection of the connector
of the Relay PCB and the Paper Surface Sensor (PS6).
- If it is not operated after checking the connector connection, replace the Paper Surface Sensor
(PS6), the Relay PCB, and the Lifter Motor in that order.
2) If it is raised:
- Check if the Lifter Plate stops at the upper limit position.
- Check for improper connection of the Paper Surface Sensor (PS6).
- Check for any foreign matters on the bottom of the receptacle.
- Replace the Bottom Sensor (PS9) and the Lower Limit Switch 3.
Lifter upper limit alarm
Cause:
Deck Lifter upper limit detection alarm
Detection condition/timing: The Upper Limit Sensor was turned ON while raising the lifter.
Movement/symptom:
While failure has occurred (an alarm has occurred), the target paper source cannot be used
because it is in no paper state.
Measures:
- Check the position of the Lifter Plate.
- Check for any improper connection, caught harness and disconnection of the Upper Limit Sensor
1 and 2 (PS4 and PS3).
- Execute service mode: COPIER>FUNCTION>CLEAR>DK-RCV, and check if the machine is
recovered.
- If the machine is not recovered, replace the Upper Limit Sensor 1 and 2 (PS4 and PS3).
Lifter lower limit alarm
Cause:
Deck Lifter lower limit detection alarm
Detection condition/timing: The Lower Limit Detection Switch was turned ON while lowering the
lifter.
Movement/symptom:
While failure has occurred (an alarm has occurred), the target paper source cannot be used
because it is in no paper state.
Measures:
- Check the position of the Lifter Plate.
- Check for any improper connection, caught harness and disconnection of the Bottom Sensor
(PS9) and the Lower Limit Detection Switch (SW3).
- Execute service mode: COPIER>FUNCTION>CLEAR>DK-RCV, and check if the machine is
recovered.
- If the machine is not recovered, replace the Bottom Sensor (PS9) and the Lower Limit Detection
Switch (SW3).
522
7. Error/Jam/Alarm