Oki 490 - Manual (Page 82)

82 Microline 490/491 User’s Guide
1 Remove any packing tape, then grasp the tabs (1) at either
end of the access cover and pivot it toward the front of the
printer as far as it will go.
2 Remove the printhead shipping restraint.
3 Remove the shipping restraint from the pull-up roller
assembly (1).