Post-Belt Sensor Unreached Paper Jam

Post-Belt Sensor does not turn on after the specified time has elapsed since the Registration Roller Clutch is turned on

Step	Confirmation and action	YES	NO
1	Check paper transport path Are there any foreign objects or pieces of paper in the paper transport path? Is there something wrong with the head rear paper guide Assy installed?	Remove any foreign objects or pieces of paper	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. Does the signal change between when the paper is placed and when it is not?	Go to step 4	Go to step 3
3	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 Front Frame side not fully inserted?	Clean the sensor surface, or fully insert the connector.	Replace the sensor
4	Check the Belt Drawer for dirt and installation Is the Belt Drawer listed in the “Assumed cause” section clean and installed properly?	Go to step 5	Clean and reinstall the Belt Drawer.
5	Check the Post-Belt Guide for deformation and wear Is the guide listed in the “Assumed cause” section deformed or worn?	Replace the corresponding unit.	Go to step 6
6	Check the operation of the Paper Feed Belt Drive Motor Check the operation of the corresponding Main Unit Motor with the diagnostic function. Is there any abnormal noise?	Replace the mechanical control board	Replace the gear trains or the Main Unit Motor.

# Post-Belt Sensor Unreached Paper Jam