Apple 12/640PS manual 135

Follow these instructions for installing the LaserWriter 12/640 PS duplex printing unit.

Before you install the duplex printing unit:

mThe printer must be turned off and the power cord unplugged.

mThe printer must be disconnected from your computer or network.

The duplex printing unit adds approximately 2 inches to the height and 4 inches to the depth of the LaserWriter 12/640 PS. Begin by selecting a location for the LaserWriter 12/640 PS that provides enough room to accommodate the increased height and depth of the printer.

If you intend to keep the printer in its current location, make sure that adequate room will be available for opening the top cover and the duplex printing unit door, and maintaining the printer. You will also need to temporarily move the LaserWriter 12/640 PS from its current location to place the duplex printing unit in its place. When moving the printer, be sure to place it on a strong, flat, and, stable surface that can support its weight.

IMPORTANT You must remove the optional 500-sheet cassette and feeder from the LaserWriter 12/640 PS if it is already attached. The duplex printing unit must be installed between the LaserWriter 12/640 PS and the 500-sheet cassette and feeder. For instructions on removing the 500-sheet cassette and feeder, see “Removing the 500-sheet Cassette and Feeder” later in this chapter.

1Turn off and unplug the printer, and disconnect the network cables.

2Unpack the duplex printing unit and remove any packing materials. Set aside the small package of items.

Installing Options 135