Oki B721 Maintenance Manual page 172

6. Troubleshooting procedure
Oki Data CONFIDENTIAL
5. Pull out the duplex unit by holding the grips on its both sides. 5. Return the duplex unit to the printer.
Grip (blue)
Grip (blue)
(3) Close the front cover.
Duplex unit
6. Open the upper cover of the duplex unit and check for jammed paper in the
duplex unit. If jammed paper remains, pull it out. Then, close the upper cover.
Upper cover
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