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Substandard print quality
Substandard print quality - overview
Introduction
The main reasons for poor print quality are listed in Section
quality Cause and correction on page
correct the error, then call the service center.
Dropouts and Spots - Defective Photoconductor Drum
Dropouts are areas on the print image that are inside the minimum permitted
character outlines and are as light as unprinted areas.
Spots are printed areas found outside the character contours. They are as dark as
normal print characters.
The photoconductor drum is usually at fault if dropouts and spots regularly recur
after one drum rotation, in other words, after approx. 760 mm (corresponds to 2.5
pages, 12" in length).
The following number of spots and dropouts is only permitted for new
photoconductor drums for 12" forms:
[235]
Spots
Dropouts
Substandard print quality - overview
444. If this information is not enough to
Size
< 0.25 mm
0.25 mm to 1.5 mm
<0.5 mm
Substandard print
Number per 12" form
5
2
2
443
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