Oki B721 User Manual

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When an Error Message is Displayed on the Display Screen
4
Troubleshooting
Error Codes 390 and 637
A paper jam has occurred while feeding paper
from a paper tray.
1 If there is any paper on the MP Tray, lift
the paper set cover (1) and take it out.
1
2 Insert your nger into the recess on
the right side of the printer and pull the
front cover open lever (2) to open the
front cover (3) forward.
2
3
3 Remove the jammed paper gently by
pulling the edge of paper if the edge
of jammed paper can be seen. If you
cannot nd the edge of jammed paper,
go to step 4.
4 Remove the paper from the back gently
if the edge of paper cannot be seen.
5 Close the front cover (3).
3

Oki B721 Specifications

General

Print Technology	LED
Resolution	1200 x 1200 dpi
Processor	533 MHz
Memory	256 MB
Connectivity	USB, Ethernet
Duplex Printing	Standard