Ricoh FT4430 Service Manual page 112

16 April '88
When installing the development unit [A], be sure the development
unit rail is properly engaged with the unit guide rail on the copier.
23. Install one toner cartridge [B].
NOTE: Confirm that the toner cartridge gear is properly engaged by
attempting to rotate the cartridge counterclockwise.
When the toner cartridge gear is properly engaged, the toner
cartridge will not rotate freely.
24. Remove the DIP switch cover [C] (1 screw) and turn on DIP switch 1-1.
3-8