3Com Z340PL instruction sheet Replacing the print engine ROM

PhaserLink™ Upgrade for the Phaser 340 — Upgrade Kit Z340PL

Replacing the print engine ROM

5.Locate the print engine ROM on the main board.

Note Some products may use a standard ROM IC chip while others may use an adaptor circuit board (as show in the illustration below). Either part type can be substituted for the other on this main board. Also note that there are two versions of the new print engine ROM: If you ordered the upgrade kit Z340PL Option 1, you have the ROM IC chip labeled 163-0646-00, for a Phaser 340 Plus.

If you ordered the upgrade kit Z340PL Option 2, you have the adaptor circuit board ROM, labeled 671-3913-00, for a base Phaser 340.

6.Insert the IC removal tool between the ROM (or adaptor board ROM) and its socket. GENTLY remove the old part by prying upward, being careful to not damage the main board. When the near end of the part begins to lift from the socket, gently lift the other end of the part with your fingers to prevent damage to the ROM’s pins. Remove the ROM. To protect the ROM from static electricity, slip it immediately inside an anti-static bag.

Carefully pry ROM up	Orientation
with IC removal tool	Notch

Print engine

ROM

Z340-1-01

Note Identify Pin 1 end of the adaptor board the square pads on the upper surface of the board; alternately, you can identify the pin 1 end by the notch in the pin array on the bottom-side of the board. Likewise, a notch on the end of the ROM IC chip indicates the pin 1 end of the chip.

7.Support the main board from underneath by draping the metal back panel of the board over the edge of a desk or table.

5