Xerox Document Centre ColorSeries 50 User Manual page 237

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PROBLEM SOLVING
Problem
The image quality gradually degrades on suc-
cessive copies, or copies made with settings
used previously are significantly worse than
copies you are making now.
Copies have dark bands on the lead edge and
a corner when 100% Reduce/Enlarge is
selected.
Copies have dark bands on the lead edge and
a corner when 100% Reduce/Enlarge is
selected and the DADF is used.
Corner Shift appears in the wrong area on the
copy.
The internal process control function of the
copier/printer has degraded.
Place a white sheet of paper on the Document
Glass and run 35 blank copies using Full
Colour in the Output Colour feature. Make a
copy of the document again. The copy quality
output should be improved. If not, ensure that
the image quality selections, which may have
been misadjusted previously to remedy the
initial problem, are set to the appropriate lev-
els.
Adjust the Auto Screening Adjustment feature
in the Tools Mode. Contact your System
Administrator or refer to the System Adminis-
tration Guide .
The bands may be caused by curled edges on
the document or by misregistration of the doc-
ument on the Document Glass.
Ensure that the document is registered cor-
rectly.
Ensure that the Edge Erase is at No Erase (2
mm). Increasing the amount of Edge Erase
should remove more of the dark bands.
Increasing the amount of Edge Erase, how-
ever, may eventually cause image loss.
The bands may be caused by curled edges on
the document or by misregistration of the doc-
ument by the Duplex Automatic Document
Feeder (DADF). Ensure that the Edge Erase
is at No Erase (2 mm). Increasing the amount
of Edge Erase should remove more of the
dark bands. Increasing the amount of Edge
Erase, however, may eventually cause image
loss.
If the document is positioned on the Docu-
ment Glass in the short edge feed direction,
and the paper used for copying is in the long
edge feed direction, the copy will appear to be
positioning the Corner Shift selection in the
wrong corner. Corner shift selections are ref-
erenced from the Document Glass location.
Refer to the section, "Added Features," Mar-
gin Shift feature, for illustrated examples.
NOTE: Corner Shift is also intended only for
documents that are smaller than the copy
paper selected.
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Suggested Solution
DOCUMENT CENTRE CS 50 USER GUIDE