EN Image formation troubleshooting 129
Background scatter
Background scatter results from bits of toner distributed on the front or back
of a printed page. Background scatter often is isolated to a specific area of
the page.
l Check the environment. High humidity can cause this error.
l Change the paper type, weight, or surface finish. See appendix B of the
User’s Manual for paper specifications.
l If background scatter occurs on an envelope, try moving the text to an
area with no seams. Printing on seams can cause this problem.
l If background scatter covers the entire surface of an envelope, try
adjusting the print density through your software or printer driver.
l If this problem occurs on the back of a printed page, it may be caused by
spilled toner inside the printer. See “Cleaning Your Printer” in Chapter 4.
Black page
A page is completely black.
l The toner cartridge may not be installed properly. Remove the cartridge
and reinsert it.
l The toner cartridge may be defective. Replace it.
l There may be discontinuities in the high-voltage contact points. Clean
the high voltage contact points on the toner cartridge and transfer roller.
(See Figures 7-5 and 7-6.)
l Replace the DC Controller or Laser/Scanner unit.
Dropouts
Dropouts are characters that are partially printed.
l The Paper Input Tray may have been loaded with too much paper. Make
sure that no more than 100 sheets of paper are loaded.
l A single sheet of paper may be defective. Try reprinting the job.
l Try adjusting the print density through your software or printer driver.
l Try cleaning the rollers.
l The moisture content of the paper may be inconsistent, or the paper may
have moist or wet spots on the surface. Try paper from a fresh ream or a
different paper manufacturer.
l The paper may have been damaged by inconsistent manufacturing
processes. Try paper from a different source.
Half of the page Is blank or loss of detail
The bottom of the page is blank, or part of a graphics image is cut off. This
may mean that your page is too complex for the standard printer memory.
l Set resolution to 300 dpi through your software or printer driver.
l You may need to install additional memory in your printer. See Chapter 6
for memory installation instructions.
l Check your printer driver help screens for suggestions specific to your
driver’s settings.
Service.book Page 129 Thursday, September 14, 2000 11:15 AM
