Oki B721dn Bedienungsanleitung

B721DN Right Side Paper Tray Guide

Replacement

The symptoms are constant paper jams or the paper tray will not lock in place or will pop out.

If you have to replace the Right Side Paper Tray Guide due to breakage, you should order Oki Data Part

Number: 45373501, which is the entire right side frame assembly as shown below:

Rather than removing and replace the entire right side frame, you can remove the Right Side Paper Tray

Guide by removing the 2 screws highlighted above and performing the procedure on the next pages for

replacement of the right side paper tray guide on a customer’s machine.

Screws are indicated by Red callouts

Tabs are indicated by Blue callouts

Cables / Connectors are indicated by Green callouts

NOTE:

Step

Procedure

Photo

a.) Unplug the B721DN power cord from the wall.

b.) Remove the Paper Cassette from the printer

c.) Open the front and top cover and remove the Drum and Toner assembly.

2 Remove 3 screws from the upper right side

cover.

3 Remove 1 screw from the right side lower

cover.

4 Remove 2 screws from the rear cover.

Gently pull the rear cover away from the

printer. NOTE: The rear cover has 2 tabs

along the left and right edge at the top.

6 Open the rear paper path door

There are 3 tabs holding the right side cover

at the rear of the printer. Gently release all

3 tabs as described below:

2 of them are shown at right.

8 The third tab is located above the straight

through paper path door.

At the front of the printer, on the right

cover, there are 4 tabs to gently lift away

from the printer frame.

One at the lower right corner of the right

side.

Three along the upper side of the right

cover

Now, gently lift and remove the right side

cover from the printer.

There are 8 screws on the metal shield plate

to be removed.

1 on the top of the shield

2 on the rear of the shield

5 on the face of the shield

At the front of the metal shield, gently lift

the shield over the locator pin.

There are several additional locator pins at

the top of the shield that you should lift the

shield over.

13 Lift the metal shield and remove it from the

printer.

Remove three Power Connectors (Green

boxes) and 4 Screws from the Low Voltage

Power Supply.

Remove the Low Voltage Power Supply.

15 Remove the black plastic shield that is

behind the Low Voltage Power Supply

Gently unplug the Ribbon Cables (Green

boxes) from the printer’s logic board and

carefully unthread the ribbon cable through

the printer.

Gently unplug the purple 2 wire cable

(Green box) connector from the printer and

unthread it through the printer.

18 NOTE: You may find it easier to remove the front fan by removing the 2 screws securing it to

the chassis when unthreading the ribbon and 2 wire connector from the printer.

Gently unplug the wire connector from the

2nd paper tray connector in the bottom of

the frame

20 Unplug the red 2 wire connector

Remove the screw securing the grounding

wire from the front tray to the printer

chassis and unthread the grounding wire.

Remove the screw securing the bottom

frame bracket on the right side of the

printer.

Remove the screw from the right Front

Cover Stay and disconnect the right hinge

arm.

Remove the 3 screws from the right Front

Hinge assembly and remove the hinge

assembly. The right side of the front cover is

not disconnected from the right side

cassette tray guide. Carefully unthread the

wires from the frame to the front cover.

26 Close the Top Cover and the Front Cover, being careful not to pinch any of the cables at the

front cover.

Gently flip the printer on its right side and

remove 2 screws from the 2nd paper tray

connector and remove the connector.

28 Remove 2 recessed screws from the right

side cassette tray guide

29 Remove the bottom frame bracket from the

right side cassette guide.

30 Remove the right side cassette guide.

Reassemble the printer by following the disassembly guide in reverse.

CAUTION: Rethread the cables in Steps 16, 17, 20 & 24 as they were originally threaded.

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