Manuals and User Guides for Oki OKIFAX 5900 Machine Toner Cartridges. We have 9 Oki OKIFAX 5900 Machine Toner Cartridges manuals available for free PDF download: Service Manual, Maintenance Manual, User Manual, User Handbook Manual, Manual Do Usuário, Manual De Démarrage Rapide, Guía De Referencia Rápida, Referencia Rápida, Quick Reference