Xerox 850DP - Phaser Color Solid Ink Printer Upgrade Manual

■

  Upgrading a Phaser 850N Printer to a Phaser 850DP Printer

Installing the Z8450DP upgrade provides the printer with 

32 Mbytes of additional memory and a new code ROM 

module.  The new code ROM module and the extra mem-

ory enables faster image processing,  higher resolution 

(1200 x 600  dots-per-inch), High Resolution/Photo print-

ing and automatic two-sided printing.  With the upgrade, 

the printer also supports image pipelining for faster print 

job throughput and First Page Preview for proofing the first 

print of a job.   

The printer’s built-in Configuration Page lists what size 

SDRAM DIMM is installed in each of the printer’s RAM 

DIMM slots.  To determine what size and type of SDRAM 

DIMMs are installed in your printer, scroll through the front 

panel to 

Printer Configuration

 and press 

Select

 to print 

the Configuration Page.  

1.

Turn off the printer; do not unplug the printer.  

Disconnect all host interface cables.

2.

Remove the two screws securing the board’s rear 

panel to the printer.

3.

Grasp the rear panel by the retractable plastic 

handle and slide the main board out of the printer 

card cage.

Note The printer accepts two SDRAM DIMMs, which can 

vary in size from 32 Mbytes to 128 Mbytes.  Only 

32-Mbyte, 64-Mbyte, 128-Mbyte, 196-Mbyte, and 

256-Mbyte configurations are supported. You will 

not get the full amount of memory if you mix a 

32-Mbyte DIMM with any larger size. You will only 

get the amount of the larger size (32 + 32 = 64, 

32 + 64 = 64, 32 + 128 = 128).

Slot DIMM 1 should already contain an SDRAM 

DIMM when the printer was shipped from the 

factory.  

4.

To install an SDRAM DIMM in the keyed DIMM 

connector, insert the DIMM until it locks in place.  

When properly inserted, a tab on each end of the 

connector slips into a notch on each end of the 

SDRAM DIMM.

5.

Locate the code ROM module. To 

release the installed code ROM module, 

spread the latches securing each end of 

the module in the connector.  

6.

To install the code ROM module in the 

keyed module connector, insert the 

module until it locks in place.  When 

properly inserted, a tab on each end of 

the connector slips into a notch on each 

end of the ROM module. 

7.

Carefully align the main board with the 

board guides at the rear of the printer.   

Firmly insert the main board into the 

printer by pressing inward on the 

indents on the rear panel

.  Ensure that 

the main board is fully seated.  Secure 

the board with the two screws removed 

earlier.  

8.

Print a Configuration Page to check its 

listing of the printer’s memory and 

options.  If the amount of RAM memory 

does not match your installation (the 

printer should now have at least 

64 Mbytes of RAM), reinstall the 

SDRAM DIMMs, ensuring that they are 

fully seated and correctly installed.  

9.

Update your host computer’s printer 

driver so that the driver matches the 

DP - upgraded printer; this involves 

configuring the printer driver residing on 

your computer.  Refer to the Phaser 850 

Advanced Features and Troubleshooting 

Manual 

on the printer’s CD-ROM

.   

Caution

■

Leave the printer plugged into its power 

outlet; this preserves a ground path for 

static discharges.  

■

Touch the printer’s bare metal frame often 

to discharge static electricity from your 

body.  

■

Handle the circuit board(s) by their edges 

only.  

■

Do not lay the board(s) on a metal 

surface.  

■

Avoid wearing nylon or polyester clothing; 

they generate static electricity.

Main

board

DIMM 1

DIMM 2

SDRAM DIMM

840-4-87

Code ROM module

Copyright 

©

 1999 by Tektronix, Inc.  All rights reserved. 

075-0497-AA