![background image](http://html.mh-extra.com/html/canon/perfect-binder-b1/perfect-binder-b1_troubleshooting-manual_58071205.webp)
2-19) Turn the gear for the waste paper buffer drive assembly counterclockwise to move the stack buffer tray up to the upper limit
position.
2-20) Pull off the sensor connector which can be seen from the stacking assembly side.
2-21) Detach the stacking tray sensor unit from the waste paper unit side.
- 2 screws
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