Apple LaserWriter 12/640 PS - Manual (Page 233)

234 Chapter 11
Nothing is printed on the paper.
If you get a blank document, try the following steps.
m If the cartridge is new, be sure to remove the plastic tape.
m Redistribute the toner powder by gently rocking the toner cartridge.
If you still get a blank document, the cartridge has run out of toner and needs
replacing.
The image prints in black and white although the original document is in color or
grayscale.
If the printed image contains only black and white areas instead of grays, try
the following step.
m Check to make sure that grayscale printing is turned on (on a Mac
OS–based computer, select the Color/Grayscale option in the Print Options
dialog box).
The image is too light.
If the printed images are too light, try the following steps.
m Change the print density to a darker level.
m Replace the toner cartridge.
If you are using a Mac OS–based computer, you can change print density
with the Apple Printer Utility. For more information, see Appendix A. If you
are using an IBM PC or compatible computer, you can change print density
with the LaserWriter Utility for Windows. For more information, see
Appendix A.
The image is too dark.
If the image is too dark, try the following steps.
m Change the print density to a lighter level (see Appendix A).
m Replace the toner cartridge; it may need to be changed.