Tektronix PHASER 560 Service Manual page 221

B
Test Prints
Single white spot appear in the same place on the print
This indicates a bad spot has developed on the imaging unit's
photoconductive belt which will not transfer toner. The imaging
unit must be replaced. If the spot appears to migrate vertically
from print to print then the defect is on the imaging unit's
accumulator belt. In either case the imaging unit must be
replaced.
Contamination of one color by another
This is most noticeable on solid primary fills. This is caused by a
defective photoconductive cleaning blade. The blade is not
scraping off all of the untransferred toner from the previous pass
of the photoconductive belt to the accumulator belt prior to the
next toner's transfer to the photoconductive belt. Replacing the
imaging unit corrects this problem.
Rarely, a sheet of paper can become folded and jam in the
imaging unit, smudging the image.
B-7
Service Manual
Downloaded from www.Manualslib.com manuals search engine