Ricoh D131 Service Manual page 96

Punch Units (B531/A812)

No special DIP switch settings are required for this punch unit. The punch unit sends
an identification signal to the machine, so it knows what type of punch unit has been
installed.
17. Slide the hopper [A] into the finisher.
18. Re-attach the inner cover and rear cover.
19. Close the front door and re-connect the finisher to the machine.
D131/D132/D133 2-52 SM