Xerox N2125N - DocuPrint B/W Laser Printer, Руководство по обслуживанию

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02/2000
3-4 DocuPrint N2125
Image Quality Defect Definitions
Initial Issue Image Quality Repair Analysis Procedures
Image Quality Defect Definitions
The System Controller Test Print ( Figure 1 ) is used to evaluate each of the print quality param-
eters. Each area of the test pattern is used for a print quality parameter. The areas and the
print quality parameters are listed in Image Quality Checkout.
Table 1 Image Quality Defect Definitions
Defect Definitions Go To:
LIGHT PRINTS: The overall image density is too light. IQ RAP 1
BLANK PRINTS: Prints with no visible image. IQ RAP 2
SPOTS: There are spots of toner on the page. IQ RAP 3
HORIZONTAL DELETIONS: There are areas of the image that are extremely
light or missing entirely. These areas run horizontally across the page in the
direction of scanning. IQ RAP 4
VERTICAL DELETIONS: There are areas of the image that are extremely
light or missing entirely. These areas run vertically along the page in the
direction of paper movement. IQ RAP 5
SPOT DELETIONS: Solid areas are marked with irregular white areas. IQ RAP 6
VERTICAL STREAKS: Extraneous dark lines/bands in the process direction. IQ RAP 7
HORIZONTAL STREAKS: Extraneous dark lines/bands in the direction of
scan. IQ RAP 8
RESIDUAL IMAGES: The image from a previous print, which was not
removed during the cleaning process, has been developed on the current
print. IQ RAP 9
BLACK PRINTS: The print is completely covered with toner and has no visi-
ble image. IQ RAP 10
BACKGROUND: Uniform toner contamination in non image areas. Refer to
the Background specification. IQ RAP 11
UNEVEN DENSITY: The text/line darkness and solid area density image var-
ies across the print. IQ RAP 12
SKEWED IMAGE: Angular displacement of the image from its intended posi-
tion on the print. Refer to the specification. IQ RAP 13
DAMAGED PRINTS: Creases, wrinkles, excessive curl, cuts, folds or
embossed marks. IQ RAP 14
REGISTRATION (lead edge to trail edge): Displacement of the image, in the
process direction, from its intended position on the print.
(inboard to outboard): Displacement of the image, in the direction of scan,
from its intended position on the print. IQ RAP 15
SKIPS / SMEARS: Skip-Loss or stretching of the image in bands across the
process direction.
Smear-The distortion of the image in bands across the process direction that
cause it to appear to be blurred or compressed. IQ RAP 16
UNFUSED IMAGE: Part of or all of the image is unfused. Refer to the specifi-
cation. IQ RAP 17
RESOLUTION: At 600 DPI, the two pixel lines and halftone patches cannot
be reproduced clearly on the print. IQ RAP 18