Ricoh SP C400DN User Manual page 146

Replacing Consumables and Maintenance Kit
G
Insert the projection part into the pivot inside the left cover, and then place
the waste toner bottle in the horizontal position.
H
The green lever will slide automatically when the waste toner bottle is set.
6
I
Check the waste toner bottle is correctly locked.
J
Carefully close the left cover.
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AET156S
AET157S