Apple LaserWriter 12/640 PS - Manual (Page 101)

Follow these instructions for installing the LaserWriter 12/640 PS duplex
printing unit.
Before you install the duplex printing unit:
m The printer must be turned off and the power cord unplugged.
m The 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.
1 Turn off and unplug the printer, and disconnect the network cables.
2 Unpack the duplex printing unit and remove any packing materials. Set aside the small
package of items.
101 Installing Options