Apple LaserWriter 12/640 PS - Manual (Page 175)

Removing the face-up output tray
1 Slide in the tray.
2 Gently pull up on the face-up output tray (to remove the tabs from their receiving slots)
and then out.
Increasing the printer RAM
You can increase the memory size of the LaserWriter 12/640 PS. You can
install up to 64 megabytes (MB) of random-access memory (RAM) in the
printer to provide faster performance on complex documents, documents
containing many fonts, and duplex printing. You can also enable the printer’s
PhotoGrade feature, which provides enhanced printing of graphics, by
increasing the printer’s memory to 12 MB of RAM or more.
Adding RAM allows more fonts to be downloaded to the printer at one time;
provides more space to store the calculations needed for large or complex
images; increases the space available for font caching, or maintaining recently
used fonts in memory for faster access the next time they are needed; and
enables duplex printing.
IMPORTANT The instructions provided here explain how to install added
memory in your printer yourself. If you wish, you can also contact an Apple-
authorized dealer to install more memory for a service fee.
You can purchase additional RAM for the LaserWriter 12/640 PS in units
of 4, 8, 16, and 32 MB. You can purchase 4 MB RAM expansion kits from
Apple-authorized dealers. You can also purchase RAM expansion kits from
many electronics and computer outlets. For information about the RAM
specifications required to expand your printer’s memory, see Appendix D.
IMPORTANT The RAM used in the LaserWriter 12/640 PS is not the same
type of RAM used in earlier LaserWriter II printers. The two are not
interchangeable.
150 Chapter 5