Oki B840 Quick reference guide

How to remove
Jammed Paper
Rev.1
B840/ES8140

This document explains how to clear them quickly and simply.
If prinng mulple pages (or copies), do not assume that, having cleared an obvious sheet, others will
not also be stopped somewhere along the path. These must also be removed in order to clear the jam
fully and restore normal operaons. Please remove jammed paper carefully so that it doesn’t tear. How-
ever, if it does please ensure that no parts of paper are le inside the printer.
Check the error code displayed on the panel and remove the jammed paper by following the procedures
described in this document.
Paper Jams
Paper jams occasionally occur due to paper misfeeding from a paper tray or at any point on the paper
path through the printer. When a jam occurs, the printer immediately stops and the Alert LED on the
Status Panel informs you of the event.
For example:
2

3
WARNING!
If the printer has been powered on recently, the fuser will be hot. This area is
clearly labelled. Do not touch.
Duplex Multi Purpose Tray Inside Printer Paper Trays
Error codes and Location
Refer to the table below to nd the locaon of the paper jam
Error Code  
370 Duplex Unit 8
371 Duplex Unit 8
372 Mul Purpose Tray 4
373 Duplex Unit 8
380 Mul Purpose Tray 4
381 Inside Printer 6
382 Inside Printer/Paper Exit 5/6
383 Inside Printer 6
385 Inside Printer 6
389 Inside Printer 6
390 Mul Purpose Tray 4
391 Mul Purpose Tray 4
392 Tray 2 & Tray 3 9
393 Tray 2 & Tray 3 9
400 Mul Purpose Tray 4


A paper jam has occured near the Mul Purpose Tray
4
1. Open the Mul Purpose Tray.
2. Push the blue handle, located in the centre,
upward and open the front cover. Remove the
jammed paper.
3. If you can see the top edge of the jammed
paper, turn the blue dial in the direcon of the
arrow.
4. Slowly pull out the jammed paper in the
direcon of the arrow.
Note: In some cases, a jammed paper causing
error code 400 may be ejected automacally. In
such cases, the error message can be cleared by
opening and closing the front cover.
5. When you cannot see the top edge of the
jammed paper from the inside the Mul Purpose
Tray. Slowly pull out the jammed paper in the
direcon of the arrow.
6. Close the front cover.


A paper jam has occured near the exit
5
1. Press the release buon to open the top
cover.
2. Slowly pull out the jammed paper from the
exit.
Note: If paper has jammed at the paper exit and
you can see it inside the top cover (inside the
printer), pull the jammed paper from the inside
of the printer. Pulling it toward the back side
forcibly may damage the fuser unit.
3. Close the top cover.


A paper jam has occured inside the printer
6
1. Press the release buon to open the top
cover.
2. Touch the screw to remove stac electricity
from your body.
3. Take the image drum & toner cartridge out of
the printer and place it on a at surface.
4. Cover the removed toner cartridge.
5. When you can see the top edge of the
jammed paper. Slowly pull out the jammed
paper in the direcon of the arrow.
When prinng from any of Tray 1 to Tray 3.
When prinng from the Mul Purpose Tray.


6. When you cannot see the top edge nor
boom edge of the jammed paper move the
paper foward in the direcon of the arrow.
7. When you can see the boom edge of the
jammed paper. Raise the two blue jam release
levers of the fuser unit [A + B] and slowly pull
out the jammed paper.
Note: Aer removing paper jammed in the fuser
unit, print a Menu Map (Refer to ‘Prinng a
Menu Map’ on page 11) or print blank pages
repeatedly to use up toner that may remain
un-fused in the fuser unit.
8. When the jammed paper winds around the
transfer roller. Push (one blue) lock lever in the
direcon of the arrow.
9. Hold the transfer roller by its le rotang
sha and remove it. When it is removable, li
the gear at the right side of the fuser
simultaneously. Pull out the jammed paper
aached.
10. Pull the (two) blue jam release levers forward.
11. Place the image drum back into the printer.
Note: When toner clings to the transparent lm
under the image drum, wipe it o with so ssue
paper.
12. Close the top cover.

1. Pinch and li the jam release lever of the
duplex unit to open the duplex unit cover.
2. Pull out the jammed paper.
Note: If you cannot see the jammed paper,
close the duplex unit cover. The jammed
paper should be ejected automacally. If the
jammed paper cannot be ejected even when
the duplex unit cover is closed, turn o the
printer. (Refer to “Turning o the Printer” on
page 10)
The printer must be switched o, before
removing the duplex unit.
3. The cassee cover becomes detached
when the duplex unit is removed.
4. Keep the duplex unit lied and pull out the
jammed paper, check the duplex unit for
remaining jammed paper.
5. Close the duplex unit cover.
6. Place the duplex unit and the cassee cover
back into the printer.

A paper jam has occured in the duplex unit
8


A paper jam has occured in paper tray 2/tray 3
1. Pull out the paper cassee tray.
2. Remove the jammed paper.
3. Aer removing the jammed paper, open the
Mul Purpose Tray.
4. Push the blue handle, located in the centre,
upward and open the front cover.
5. When a paper jam occurs, turn the blue dial in
the direcon of the arrow, and slowly pull out
the jammed paper.
6. Close the front cover and the Mul Purpose
Tray.



1. Before turning o the printer, be sure to shut down by using the following procedure.
Note: Pressing the OFF (O) side of the power switch suddenly, may cause the printer to be inoperable and
could damage the printer.
2. Hold down the BACK buon for four seconds or more to display [SHUTDOWN START YES].
3. Press the ENTER buon. The printer displays [SHUTTING DOWN], starng shutdown processing.
4. Press the OFF (O) side of the power switch when the printer displays [PLEASE POWER OFF/SHUTDOWN
COMP].
Note: You must wait several seconds before you press the ON (I) power switch.
10