Ricoh D197 Service Manual page 342

External Keyboard Bracket Type M3 (D739-10)
14. Connect the keyboard cable to the USB slot.
15. Reattach the scanner right cover [A] ( ×1).
16. Reattach the scanner rear cover [A] ( ×3).
17. Close the right cover.
18. How to enable the keyboard:
User Tools→System Settings→Admin Tools→Keyboard set to desired language.
D197/D198/D199/D200/D201/D202 2-272 SM