Xerox Phaser 7400, Phaser 7400N, Phaser 7400DN, Phaser 7400DT, Phaser 7400DXF Supplementary Manual

Date: 12/15/2005
Subject: Volatility statement for Phaser 7400 color printers

Phaser 7400 printer does not retain any latent user image in the mechanical system of the printer during normal
operation. If a print job is disrupted prior to completion a latent image may exist in the mechanical systems of
the printer; the image may be removed by cycling power or printing a page.

Phaser 7400 printer does not retain any latent image in the print controller (raster image processor) or associated
RAM following the completion of printing. No user data is maintained in the print controller or associated
RAM following the cycling of power.

Phaser 7400 printer contaisn non-volatile flash memory contained on the controller. This memory does not
retain any variable printing data, but can be used to retain software updates, store fonts, etc.. No user
information is retained in this memory.

Phaser 7400 printers equipped with hard disk drives will retain latent images in the hard disk only when the job
retention features are enabled / utilized (Secure print, proof print, or saved print or job accounting).

A procedure for securely erasing any hard disk data is an appendix to this document.

Phaser 7400 printers contain non-volatile memory in the form of a configuration card. This card does not retain
any variable printing data, but does retain printer configuration details, including network address, configuration
details, printer name, etc. This configuration card can be removed and/or destroyed to eliminate the stored data.

Xerox Corporation
Office Printing Business
26600 SW Parkway
P.O. Box 1000 M/S 7060-630
Wilsonville, OR 97070

Memory types for the Phaser 7400 printer are:

User

Model Memory Size (Bytes) Memory Type Volatility

Data

7400/N 256MB SDRAM Volatile Yes*
7400/DN 256MB SDRAM Volatile Yes*
7400/DT 512MB SDRAM Volatile Yes*

7400/DXF 512MB SDRAM Volatile Yes*
All models

(optional)

20GB minimum

Hard Disk Non-volatile Yes

All models 32 EEPROM Non-Volatile No**
All models 32KB EEPROM Non-Volatile No**
All models 32KB EEPROM Non-Volatile No**
All models Unknown KB EEPROM Non-Volatile No
All models 16MB Flash / ROM Non-Volatile No

Note:

Flash / ROM is used for Firmware code and contains no user data.
* SDRAM memory can be upgraded to 1024MB for all models
** This EEPROM contains user network data and printer operational parameters. It does not contain user

print data.

Internal Hard Disk File Security

Xerox Phaser Printer Models

1. Supported Printers

Xerox Phaser printer models now incorporate security features for data stored on the
printer’s internal hard disk. Refer to the printer’s documentation or visit

http://www.xerox.com/officeprinting to determine if a particular model of Phaser

printer supports internal hard disk security options.
Earlier models of Xerox Phaser printers cannot be upgraded to support internal hard

disk security.

2. Types of data stored on the printer’s internal hard disk

An internal hard disk is an optional feature for some models of Xerox Phaser printers.
Not all printer models can support an internal hard disk.

The internal hard disk on a Phaser printer is used in several ways to improve printing
performance, to implement additional features, and to improve printer usability and
management. Security-conscious users often wish to know what types of data are
stored on the internal hard disk.

When present, the printer uses the internal hard disk for the following purposes and
data types:

a. The printer stores page content data for Saved, Secure, Proof, and printer-

collated print jobs. Print jobs sent for immediate printing, e.g. Normal jobs that
do not use printer-based collation do not have their page content data saved on the
printer’s internal hard disk.

For Saved, Secure, Proof, and printer-collated print jobs, the printer must be able
to access each page in a print job out of the order they were transmitted to the
printer, and possibly at a later time. Because the contents of only a few pages at a
time can be stored in RAM memory, the page content data is stored on the
printer’s internal hard disk. These types of print jobs are not available without an
internal hard disk.

Page content data files are stored in a Xerox proprietary, unpublished compressed
binary data format. These data files are not directly accessible from any printer
interface other than the standard controls or commands for printing jobs, e.g. no
feature exists for transferring or retrieving this data to another computer or
printer.

For Proof, Secure, and printer-collated print jobs, the page content data files are
deleted by the printer when the print job is completed. The page content data files
for Saved print jobs are stored on the printer’s internal hard disk and accessed
through the printer’s CentreWare IS internal web server or the printer’s front
panel, until they are explicitly deleted by the user.