Canon imagePRESS C850 Series Troubleshooting Manual page 64

10) Remove the 1 screw [1] near the center of the guide assembly, and remove the back end assist unit [2].
[Reference] If the screw [1] is hidden behind the back end assist plate [3], slide the belt, move the back end assist plate, and
remove the screw.
11) Slide the back end assist button [1] in the arrow direction from the back end assist unit, and remove the back end assist plate
[2].
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