
Installing the Duplex Unit
Install the Duplex Unit
If you will be using the duplex unit to print complex
!
documents or graphics, you will need to purchase and 
install additional memory. For Models C7200 and 
C7200n, add 64 MB memory (OKI # 70037401). For 
Model C7400n, add 128 MB memory (OKI # 70037501)
Activate the Duplex Unit in the
Driver
OKI P/N 70037201
1 Unpack the duplex unit and remove any shipping
materials.
2 Turn the printer off, then open the front cover.
3 Locate the slides inside the printer.
4 Place the duplex unit guide rails on the slides, then push
the duplex unit all the way into the printer.
Windows PCL Driver
1 Click Start ® Settings ® Printers.
The Printers dialog box opens.
2 Right click the OKI C7200 or C7400 PCL printer icon,
then click Printing Preferences (Windows 2000), 
Properties (Windows Me, 98, 95) or Document Defaults 
(Windows NT 4.0).
3 In the Paper tab, click Device options. 
4 Click Duplex option unit to select it, then click OK. 
5 Click OK, then close the Printers dialog box.
Windows PostScript Driver
1 Click Start ® Settings ® Printers.
The Printers dialog box opens.
2 Right click the OKI C7200 or C7400 PostScript printer
icon, then click Properties.
3 Windows 2000 and NT 4.0:
a Click the Device Settings tab. 
b Scroll down to Installable Options and click Duplex. 
c Under Change ‘Duplex’ Setting, click Installed.
Windows Me, 98 and 95:
a Click the Device Options tab. 
b Click Duplex. 
c Under Change setting for: Duplex, click Installed.
5 Close the front cover.
4 Click OK, then close the Printers dialog box.
Macintosh Driver
1 Activate Chooser from the Apple menu. 
2 Select LaserWriter 8. 
3 Click Printer ® Setup. 
4 Click Configure. 
5 Change the Duplex setting to Installed. 
6 Click OK twice. 
7 Close Chooser.

Limited Warranty: United States
Oki Data Americas, Inc. (Oki Data) warrants this OPTION 
to be free from defect in material and workmanship and will 
remedy any such defect according to the terms of this
Limited Warranty.
Oki Data will repair (or at its option, replace) at no charge, 
any defective part(s) of the OPTION for one (1) year from 
the date of purchase. This Limited Warranty extends to the 
original purchaser only.
To make request or claim for service under this Limited 
Warranty the original purchaser must return the Oki Data 
product, shipping prepaid, in the original shipping container 
or equivalent, to Oki Data or an authorized Oki Data service 
center and assume the risk of loss or damage in transit. A 
written receipt for the product, showing the date of purchase, 
dealer’s name, and item purchased must accompany any 
request or claim for work to be performed under this Limited 
Warranty.
This Limited Warranty shall not apply if the product has 
been damaged due to abuse, misuse, misapplication, 
accident, or as a result of service or modification by any 
other than an authorized Oki Data service center.
THERE ARE NO EXPRESS WARRANTIES OTHER 
THAN THOSE ON THE FACE HEREOF AND 
DESCRIBED ABOVE. NO WARRANTIES WHETHER 
EXPRESS OR IMPLIED, INCLUDING, BUT NOT 
LIMITED TO, ANY IMPLIED W ARRANTIES OF 
MERCHANT ABILITY OR FITNESS FOR A 
P ARTICULAR PURPOSE, SHALL EXTEND BEYOND 
THE RESPECTIVE WARRANTY PERIOD DESCRIBED 
ABOVE OF ONE (1) YEAR. Some states do not allow 
limitations on how long an implied warranty lasts, so the 
above limitation may not apply to you.
OKI DAT A SHALL NOT BE RESPONSIBLE OR LIABLE 
FOR ANY SPECIAL, INCIDENTAL OR 
CONSEQUENTIAL DAMAGES OR LOSS ARISING 
FROM THE USE OF THIS PRODUCT. Some states do not 
allow the exclusion or limitation of incidental or 
consequential damages, so the above exclusion may not 
apply to you.
Additional information on obtaining service under this 
Limited Warranty is available by contacting the Oki Data 
dealer from whom the product was purchased, by contacting 
Oki Data directly at 1-800-OKI-DATA (U.S. and Canada), or 
by contacting one of the service depots listed.
This Limited Warranty applies to this Oki Data Option. 
However, the procedure for obtaining service may vary 
outside the continental United States. Contact your Oki 
Data dealer for such warranty service information.
This warranty gives you specific legal rights, and you may 
also have other rights which vary from state to state.
For the most comprehensive, up-to-date listing of Oki Data 
authorized Service Centers, call 1-800-OKI-DATA 
(1-800-654-3282).
Oki Data Service Centers
UNITED STATES CANADA
Oki Data Americas, Inc. Oki Data Americas, Inc.
Tel: 1-800-654-3282 Tel: 800-654-3282 
Fax: 1-856-222-5247 Fax: 905-238-4427
MEXICO BRAZIL
Oki Data de Mexico, Oki Data do Brasil, Ltda.
S.A. de C.V.
Tel: (525) 263-8780 Tel: 5511-5011-1518 
Fax: (525) 263-8785 Fax: 5511-5012-0267
Oki Data Americas, Inc., 2000 Bishops Gate Blvd., Mt. Laurel, NJ 08054-4620 
Tel: (800) 654-3282 FAX: (856) 222-5320 http://www.okidata.com
58346501