Oce 3121 Technical & Service Manual page 784

Release the lever (5). Unscrew the button (6), and remove the OPC unit.
3
Turn the lever (5), to lock the developing unit.
4
6
Release the feeding unit. Remove the clip (8), the lever (7) and the knob (9).
5
Slide out the upper cassette.
6
Remove the inside cover (5 screws, index 10).
7
ed.1
9
7 8
10
10
5
01 Miscellaneous 105