Oki C911 DICOM Installation instructions

OKI C911 / 931 / 941
Disassembly & Reassembly Procedures
Distributed at the Oki Data C900 Series Service Classes
Oki Data Training Department REV.1.60
2000 Bishops Gate Blvd.
Mt. Laurel, NJ 08054

II
Copyright 2014 by Oki Data Americas, Inc. All Rights Reserved.
This document describes the disassembly of the Oki Data C900 series of
printers. It is to be used during Oki Data Service Training. It is not designed to be a
self-directed course, as Oki Data Trainers will provide additional information as required
during the course. We are not responsible for typographical errors nor or we responsible
for manufacturing changes that are considered part of a products life cycle.
This document is being provided in conjunction with an Oki Data sponsored and
instructor led course. Be aware that the machine you are working with may have
already been disassembled, resulting in parts and / or screws being incorrectly replaced.
You are responsible for your own personal safety as you work through this course. You
are expected to know how to safely operate, disassemble, and repair machines of this
type. Oki Data is providing disassembly, troubleshooting, repair and reassembly
instructions specific to this series of printers. Oki Data assumes that each student has
already demonstrated their knowledge of basic electronics, troubleshooting, disassembly
and reassembly of this type of equipment.
Important Safety Notes:
• This product generates potentially lethal voltages. While Oki Data has made
every attempt to insure safe operation and voltage interruption by installing safety
circuits, it is possible to by-pass these safety circuits. Oki Data will not be
responsible for the safety of any attendee who knowingly by-passes any of these
safety devices.
• The printer units are very heavy. The C911 printer weighs approximately 230
pounds. Safe lifting techniques are required and Oki Data assumes that the
attendee is versed in established safe lifting techniques.
• These printers contain large amounts of metal that may have sharp edges or
burrs on edges. Oki Data assumes no liability for carelessness that results in
injuries to attendees. In short – Be Aware – Be Careful - Don’t Fool Around!
• If you are unsure of something – ask the Oki Data Trainer before continuing.
• Follow the disassembly instructions as they are written to insure your safety as
well as your successful disassembly/reassembly of the printer(s) you’ll be
working with.

1
1All printer directions refer from front of printer
IMPORTANT: Please keep all screws with the parts they came out of and during reassembly pay
careful attention to installing the correct screw color and size. If you have leftover
screws – please return them to the instructors before the printers are re-packed.
Front
Left Side
Rear
Right Side
2
Lift the toner cartridge cover to view the
installed toner cartridges.
NOTE: The C911 / C931 each have 4
toner cartridges and drums while the C941
has 5 toner cartridges and drums.

2
3
Remove all toner cartridges by lifting the
front edge and slowly pulling it out.
You will see a blue handle on top of the
toner of the toner cartridge when it is
about half way out. Lift and support the
toner cartridge by this handle.
4
Open the front door to reveal the installed
drums.
Remove the drums by lifting the front edge
and pulling the drum out. As you slowly
pull the drum out, grab the drum as shown
to fully remove and support the drum as
you remove it.
CAUTION: Never grab the drum
assembly around the bottom as your
hands / fingers may touch the surface of
the drum, leaving oil on the drum surface.
NOTE: Never wipe the drum surface
with anything!

3
5
Remove waste toner bottle by pulling the
handle on the end of the waste toner
bottle. As you remove the waster toner
bottle, you will see a handle in the middle
of the bottle. Grab and support the waste
toner bottle by this handle to fully remove
it from the printer.
6
Remove Belt Unit:
On either side of the belt assembly are blue
captive locks. Gently twist these 2 locks
and lower the locking handles.
Grasp the blue handle and move it to the
right to unlock the transfer belt assembly

4
7
Grasp both transfer belt handles and gently
pull the transfer belt assembly from the
printer.About 2/3 of the way removed you
will feel resistance – just lift the belt
assembly slightly to clear these “safety
stops.”
After removing the transfer belt assembly,
push the blue handle to the left and close
and re-lock the locking handles, Unlocked
in Step 6.
Failure to re-lock the 2 lock levers prior to
closing the front drum door may break the
lock levers or the front drum door!
CAUTION: Do Not place the image
belt in any position other than horizontal as
you may create a toner spill if you do.
Place the belt on a clean, smooth surface to
protect the transfer belt from
contamination.
CAUTION: Do Not Touch the belt
surface as you will leave fingerprints and
this may cause printed image problems.
8
Steps 3 through 7 are required to clean and
service the LED Print heads in the printer.
Close the front drum door.

5
9
Remove the paper cassette by pulling the
drawer straight out and lifting it slightly.
10
Remove toner cover door by removing the
4 black screws and gently lifting and pulling
the door away from the printer.
11
Remove Operator Panel by removing the 2
black screws.

6
12
Gently lift the operator panel.
Caution – there are 2 wire harnesses
attached to the rear of the operator panel.
Reassembly Warning:
It is very easy to unplug one of these
connectors when reattaching the operator
panel during reassembly. If the cable(s)
are disconnected, symptoms may be no
display and no initialization when
powered up.
13
Unplug the 2 wire harnesses from the
operator control panel board.
14
On the left side, remove the duplexer by
lifting the handle and sliding it out.
Caution: The duplexer on the C900
series is very short, so support it as you
remove it.

7
15
Remove the 4 screws (2 on the outside / 2
on the inside) of the cover below the
duplexer.
16
Remove the plastic cover.
17
Remove lower left cover which is held in by
2 screws and 4 tabs.
NOTE: Metal plate which was removed
in the previous step is still present in this
picture.
18
Remove the low voltage power supply
cover, which is secured by 3 screws and 4
tabs.
Gently lift the corner over the main power
switch.

8
19
On the rear cover, remove the HDD access
cover w/1 captive screw.
20
Remove 7 sliver screws from the rear
cover. There is also a tab on the left side of
the printer, near the power switch, that
you must depress to remove the cover.
Release that tab and gently lift the cover
over the lift handle extension on the side
and slide off to remove.
NOTE: Some units may have 1
additional screw in the middle of the back
cover.
21
There are 2 tabs holding the offset cover in
place, 1 in the rear of the printer and one
at the front of the printer – shown on next
page.

9
Releasing the front offset cover tab.
22
Gently release these tabs and remove the
offset cover.
23
Remove the stacker full lever which is
clipped in.

10
24
Remove the photo interrupter sensor from
the job offset assembly. It is clipped in with
3 tabs.
25
Unthread the photo interrupter sensor wiring harness and let hang over the rear of the printer.
26
Remove 3 screws securing the job offset
into the printer. 1 short screw on the top
frame and 2 longer screws into the base
frame – 1 in the rear and 1 in the front.
(Front screw is shown on next page)

11
Front screw securing the job offset
mechanism to the printer.
27
Gently lift and remove the job offset
mechanism.

12
28
Remove 3 screws holding the top cover.
2 in the front – 1 at right and one 1 left,
facing down to the frame.
3rd screw is at rear, facing down into the
frame.
29
There are 4 tabs holding the top cover to
the toner cartridge separators. Disengage
the 4 tabs and lift the top cover off.
30
Open the paper jam door and remove it by
gently spreading left side hinge pin and
removing the door from the frame.

13
31
Open the eject assembly and pull the
drawer out from the printer.
32
Lift the blue lock tab and remove the fuser
by lifting it straight up.
33
Loosen the 9 screws on the rear shield
plate, slide the shield to the left and slide
the shield plate from the printer.

14
34
On the engine board (FIY2) locate the
“MPTIF” connector (12 wire connector with
purple cables) and gently unplug it.
Unthread this cable / connector from the
wire bundles and gently pull it towards the
MPT assembly.
35
Remove the lift handle from the rear by
removing 3 screws and unthreading the
wire bundles from the handle assembly.
36
Remove 3 screws from the right side lower
access cover.
37
Unclip the right side of the lower access
cover by squeezing the clip.

15
38
From the paper tray opening, slip a small
screw driver in to press and release the 2
tabs on the left side of the lower access
cover.
Remove the access cover.
39
Slide the paper guide towards the front of
the printer to remove.
40
Open the front drum cover panel.

16
41
Open the multi-purpose paper tray (MPT)
unit.
42
Locate the black plastic cover on the side
frame.

17
43
Lift the tab on the black plastic cover (as
shown in the last photo) and slide the
plastic cover down and remove it.
44
Remove the 4 screws securing the multi-
purpose tray unit to the printer. Be Careful
– It may slip!

18
45
Ensure the 12 purple wire bundle and
connector have plenty of slack in it and
slowly pull the multi-purpose tray unit from
the printer.
NOTE:
The following step is only necessary on the C911 / C931
46
Remove the fifth station guard by removing
1 black screw and unclip from the printer
frame, left and top.
NOTE: Production units may have this
screw located in slightly different location.