Oce 3121 Technical & Service Manual page 13

No. Adjustments
Tap lightly on the top of the
5
toner cartridge so that all
toner will fall off.
6 Push the black cover back into
the developing unit.
The toner cartridge will be
I
released.
7 Remove the toner cartridge
8 Push in the developing unit
until it stops.
9
Turn the locking lever in the
direction of the arrow, to
lock the developing unit in
place.
6 TSM Océ 3121
Remarks
locking lever
Developing assembly
locking lever
Installation