Canon imagePRESS C850 Series Troubleshooting Manual page 29

[Service work]
When the safety cover comes off, re-attach it following the steps below. Depending on the product, the attaching way shall be
selected from the following 2 procedures.
1) For Finisher -AA1, Saddle finisher-AA2, Staple/Booklet finisher -B1/L1/T1
2) For Staple/Booklet finisher-C1/J1/U1
1) For Finisher-AA1, Saddle finisher-AA2, Staple/Booklet finisher-B1/L1/T1
1-1) Open the front door [1] and remove the clip [2].
1-2) Lift the front door [1] to remove. (Left figure is Booklet Finisher, Right figure is Staple Finisher.)
1-3) Remove two screws [1] and open the escape door [2].
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