C1 Paper Feed Sensor Paper Stuck Jam

Error code
  • 84 C1 Paper Feed Sensor Paper Stuck Jam
Occurrence condition
  • The C1 Paper Feed Sensor detected paper when the power was turned ON, when the cover was closed, when the product recovered from the power saving mode, or when the printing operation ended
Assumed cause
  • Foreign objects or pieces of paper in the paper transport path
  • The C1 Paper Feed Sensor has a dirty surface, has fallen off, or is faulty
  • MCU board failure
Related parts
  • Right Door Unit (C1 Paper Feed Sensor)
  • MCU Board
Troubleshooting

Step

Confirmation and action

YES

NO

1

Check paper transport path

Is there any foreign matter, paper chips, etc. in the paper transport path?

Remove foreign matter, paper fragments, etc.

Go to step 2

2

Check the operation of the C1 Paper Feed Sensor

Check operation of the C1 Paper Feed Sensor with the diagnostic function.

Judgment: Does the signal change between when the paper is placed and when it is not?

End Go to step 3
3

Check the C1 Paper Feed Sensor for installation, dirt, and connector connection

Is the C1 Paper Feed Sensor installed improperly? Is there dirt on the sensor? Is the connector not fully inserted?

Is the C1 Paper Feed Sensor relay connector not fully inserted?

Clean the sensor surface, or fully insert the connector.

Replace the parts one by one.

  • C1 Paper Feed Sensor
  • MCU Board