Manuals and User Guides for Oki OKIFAX 5400 Fax Machine Supplies. We have 12 Oki OKIFAX 5400 Fax Machine Supplies manuals available for free PDF download: Service Manual, Maintenance Manual, Handbook, Manual Do Usuário, User Manual, Garantie, Réglementation Et Spécifications, Référence Rapide, Manual, Quick Reference, Installation Manual, Option Installation Manual