Ricoh SP C400DN User Manual page 142

Replacing Consumables and Maintenance Kit
J
Hold both upper handles, and then slide the transfer unit along the guide
rails into the printer.
The upper handles must be raised to insert the unit.
K
When the upper handles touch the printer body, lower the handles, and
then push in the transfer unit, until it stops.
6
L
Turn the green lever clockwise to lock the unit.
M
Carefully close the front cover (A).
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