EXP Computer C4077-90960 - Manual (Page 229)

Stapling Unit Assembly
The Stapling Unit Assembly is mounted in the Mailbox with Stapler,
replacing the three top output bins.
1 Turn OFF the printer.
2 Make sure the Delivery Head Assembly is not in the stapler area. It should
be in the bottom portion of the mailbox. You can move the Delivery Head
Assembly downward gently with your hand.
3 Disconnect the cable going from the stapling unit to the mailbox.
4 Remove the Left Output Bin.
5 Lift up on the outer edge of the stapling unit to clear the retaining notches,
and pull the stapling unit forward out of the frame (Figure 6-91).
To Reinstall:
Slide the stapling unit into its designated slot and lower it into its retaining
notches. Replace the Left Output Bin. Connect the cable from the stapling
unit to the mailbox. Turn the printer ON.
Mailbox with Stapler, Stapler Removal
Figure 6-91
6-102 Removal and Replacement