Post-Belt Sensor paper feed delay error

Error code
  • 55 Post-Belt Sensor paper feed delay error
Occurrence condition
  • The Post-Belt Sensor is already ON when sensor check begins.
Assumed cause
  • Foreign objects or pieces of paper in the paper transport path
  • Post-Belt Sensor has a dirty surface, has fallen off, or is faulty
  • The Post-Belt Guide Unit has fallen off.
  • MCU board failure
Related parts
  • Post-Belt Sensor
  • Post-Belt Guide Unit
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 Post-Belt Sensor

Check the operation of the Post-Belt Sensor with the diagnostic function.

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

Go to step 3 Go to step 4
3

Check the Post-Belt Guide Unit installation

Is the Post-Belt Guide Unit clean and installed properly?

Go to step 4

Clean and reinstall the Post-Belt Guide Unit.

4

Check the Post-Belt Sensor for installation, dirt, and connector connection

Is the Post-Belt Sensor installed improperly? Is there dirt on the sensor? Is the connector not fully inserted?

Is the relay connector on the Rear Frame side not fully inserted?

Replace the parts one by one.

  • Post-Belt Sensor
  • Post-Belt Guide Unit
Clean the sensor surface, or fully insert the connector.