Apple LaserWriter 12/640 PS - Manual (Page 325)

300 Chapter 12
Faded areas or white voids appear on the page.
If portions of the page are faded or are missing, try the following steps:
m Use different paper or transparency material.
m Use paper that has been in a sealed wrapper; paper that has been out for a
long time may have too much moisture in it.
m Redistribute the toner in the cartridge (see “Replacing the Toner Cartridge”
in Chapter 11).
m Use the Apple Printer Utility or LaserWriter Utility for Windows to change
the print density to a darker level. (If you use a Mac OS computer, see
“Setting the Print Density” in Chapter 2. If you use an IBM PC or
compatible computer, see “Setting the Print Density” in Chapter 3.)
m Replace the toner cartridge (see “Replacing the Toner Cartridge” in
Chapter 11).
Blotchy areas or ghost images appear on the page.
If there are blotchy areas within a gray area, or if you see ghosting of images
within printed areas (particularly on the top few inches of the page), try the
following step.
m Print two or three more copies of your page; these problems often occur
only on the first rotation of the photosensitive drum inside the printer.
The printer isn’t printing from the correct paper tray.
m Check that the correct page size is selected in the Mac OS or Windows
Page Setup dialog box.