Xerox WorkCentre 5790 Series, Service Manual

Page: 701 / 1610

May 2013
3-5 Xerox® WorkCentre® 5790 Family
IQ1
Image Quality
Figure 2 Test pattern 1.
Figure 3 Test patterns 2, 3 and 4
Table 2 Internal test patterns
Number Description Purpose
1 Blank sheet, Figure 2 . 0% area coverage. Background defects
spots, scratches.
2 75 dpi, 0 degrees 25% area cover-
age halftone.
Figure 3 .
Light density uniformity, deletions, lines,
bands, streaks and photoreceptor defects.
3 106 dpi, 45 degrees, 25% area cov-
erage halftone.
Figure 3 .
Light density uniformity, deletions, lines,
bands and streaks.
4 212 dpi, 45 degrees, 25% area cov-
erage halftone.
Figure 3 .
Reserved for engineering investigations.
Stress test pattern. Will not be defect free.
5 106 dpi, 45 degrees, 50% area cov-
erage halftone.
Figure 4 .
Uniformity, fuser defects, lines, bands,
streaks and smears. Barber Pole deletions.
6 212 dpi, 45 degrees, 50% halftone.
Figure 4 .
Reserved for engineering investigations.
Stress test pattern. Will not be defect free.
7 424 dpi, 45 degrees, 50% halftone.
Figure 4 .
Reserved for engineering investigations.
Stress test pattern. Will not be defect free.
8 Perpendicular lines 2 on 2 off. Figure
5 .
Motion quality. ROS, developer, registration
transport, fuser and intermediate gear trains.
9 Perpendicular lines 8 on 56 off. Fig-
ure 7 .
Reserved for engineering investigations.
Stress test pattern. Will not be defect free.
10 Parallel lines 8 on 56 off. Figure 6 . Lines that run LE to TE.
11 Combined grey scales. Figure 8 . This test pattern is for engineering develop-
ment and used in the light copies RAP.
12 Perpendicular bands. 25 mm (1 inch)
on and 25 mm (1 inch) off black.
Fig-
ure 9 .
.
Solid area reproducibility. For checking fus-
ing, stripper finger marks, solid area, offset-
ting and cleaning.
13 Perpendicular lines 2 on 30 off. Fig-
ure 10 .
Motion quality, wobble (ROS).
14 12cm. (4.75 inches) Lead edge black
band.
Figure 11 .
Fuser offsetting and cleaning failure. Stress
test for stripping from the fuser.
15 Tone reproduction curve. Step-
wedge 106 dpi, 45 degrees.
Figure
12 .
21 mm wide strips that run inboard to out-
board of varying area coverage. The 50%
wedge is used for checking IOT darkness.
16 Quadrille 4 on 60 off. Figure 13 . Used to check for deletions, skew and skips.
17 Ladder chart. Figure 14 . Registration and skew.
18 Manufacturing, tone reproduction
curve. 10 mm strips (235 lines),
alternating area coverage, 50%,
25%, 75%, 0%, 100% repeating
(right to left) with a 3 mm white bor-
der.
Figure 15 .
10 mm wide strips that run inboard to out-
board of alternating area coverage. Used in
manufacturing for automated measurements.
19 Field test pattern. Uniformity areas,
registration marks and resolutions
targets.
Figure 16 .
Registration, resolution, uniformity, streaks
and bands