The printer features two DIMM connectors which accept both 32- or 64-Mbytes RAM DIMMs. Ask for any of these upgrade kits:

• ZMB32 - 32 Mbyte Memory Upgrade
• ZMB64 - 64 Mbyte Memory Upgrade

Static electricity precautions

• 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.

Installation

The printer's built-in Configuration Page, lists what size RAM DIMM are installed in each of the printer's RAM DIMM slots. If necessary, scroll though the front panel's Help Pages, and print the Configuration Page to determine what size and type of RAM DIMMs are installed in your printer.

1. Power down the printer. Leave the power cord plugged in to provide a ground path for static discharges. Remove the interface cables.
2. Loosen the two rear panel securing screws.
3. Slide out the main board.
4. If you must remove a small-capacity RAM DIMM to install a larger-capacity RAM DIMM, spread the latches of the installed RAM DIMM securing each end of the DIMM in the connector.
5. To install a RAM 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 RAM DIMM.
6. Reinstall the main board into the printer.
7. Reconnect the host interface cables. Turn on the printer and print the start page to verify the amount of memory installed in the printer.
8. Update your host computer's printer driver; this involves configuring the printer driver residing on your computer. This is discussed in the Phaser 840 Setup Guide as well as in the printer CD-based document Advanced Features and Troubleshooting Manual.