Oki B721 User Manual

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When an Error Message is Displayed on the Display Screen
4
Troubleshooting
Error Codes 370, 371, 373, 641, and
642
A paper jam has occurred around the duplex
unit.
1 Open the rear cover (2) by pulling the
lock lever (1) at the center of the back
side of the printer toward you.
1
2
2 Check for jammed paper inside the
printer. If jammed paper remains,
remove it.
3 Return the rear guide (3) to its original
position then close the rear cover (2).
2
3
4 Insert your nger into the recess on
the right side of the printer and pull the
front cover open lever (5) to open the
front cover (4) forward.
Note
● Open the front cover gently. If you open it rapidly,
the MP Tray may open.
5
4
5 Pull out the duplex unit (6) by holding
the grips (7) on its both sides.
7
7
6
Note
● The duplex unit cannot be removed. If it is forcibly
removed, it may be damaged.

Oki B721 Specifications

General

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