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hp color LaserJet 9500: print quality defects
Print Quality Defect Guide
Table of Contents
1.
Print Quality Defect Guide
1
2.
Table of Contents
1
3.
Useful dimensions for repeating defects:
2
4.
Frequency of print defects
3
5.
Print Quality Assessment, page 1
4
6.
Print Quality Assessment, page 2
5
7.
Narrow horizontal streak (parallel to feed direction)
6
8.
Narrow horizontal streak (parallel to feed direction) - continued
7
9.
Wide horizontal streak
8
10.
Light marks (98mm dot in single color)
9
11.
Light marks (98mm dot in single color) - continued
10
12.
98mm repeating marks of one color on all test pages
11
13.
98mm repeating marks of one color on all test pages - continued
12
14.
45mm repeating marks of one color on all test pages
13
15.
98 mm Ghost (Shadows of the test bars in the 2 nd column)
14
16.
98 mm Ghost (Shadows of the test bars in the 2 nd column) - continued
15
17.
140 mm ghost (Shadows of the test bars in the 3 rd column on any test page)
16
18.
Roller marks on glossy or plastic media such as HP Tough Paper
17
19.
Auger marks
18
20.
Random Light or Dark Spots (ITB damage)
19
21.
Rib marks/discharge marks
20
22.
Scratches
21
23.
Hand print on ITB
22
24.
Cleaning blade tuck (cleaning blade failures)
23
25.
Dropped or missing color planes
24
26.
Cleaning Blade not latched or nicked
26
27.
Cleaning Blade ghost (cleaning blade failure)
27
28.
Washed Out or Missing Color, Toner on Edges of Paper due to Cleaning blade failure
28
29.
T2 not in contact
31
30.
Fine pitch banding
34
31.
OPC surface contamination
35
32.
Fuser flats
36
33.
ITB drive gear slip (color plane misalignment)
37
34.
Dunes
38
35.
Belt Wave
39
36.
Wavy brush pattern
40
37.
Front or rear edge drop out
41
38.
Yellow dots – 47mm bands
42
39.
Fuser offset
43
40.
Fuser wrinkles
44
41.
Toner agglomerations
46
42.
ITB backing roller T2 contamination
47
43.
T2 roller not raised ( flock of birds patterns)
48
44.
Mottled Halftones
49
45.
Arc – T2 bushing
50
46.
Arc – Post charger corona
51
47.
Beautiful arc
52
48.
Defects with no samples
53
49.
Notice
55
HP CONFIDENTIAL
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hp color LaserJet 9500
Useful dimensions for repeating defects:
K developer
27mm
CMY developer (x4)
30 mm
Charge Roller (x4)
45 mm
T1 backing Roller (x4, on ITB)
52 mm
T2 Roller
71 mm
T2 Backing Roller (on ITB)
73 mm
OPC (x4)
98 mm
ITB Drive Roller
100 mm
Cleaning Backing Roller
100 mm
Space between T1s
100mm
Fuser Bottom
140 mm
Fuser Top
148.5 mm
PQ Defect Guide – 2
© 2003 Hewlett-Pac kard Company HP CONFIDENTIAL
NPI Fall 2003
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print quality defects
Frequency of print defects
1.
Most common
•
•
Narrow horizontal streak
45mm repeating marks
•
•
Wide horizontal streak
98 mm ghost
•
•
Light marks
140 mm ghost
•
•
From first two pages of Print Quality Assessment
98mm repeating marks
Roller Marks
2.
Commonly seen
•
•
Auger marks
Scratches
•
•
Random Light or Dark Spots (ITB
Hand print on ITB
damage)
Rib marks/discharge marks
•
3.
Occasionally seen
•
•
Cleaning blade tuck
Washed Out or Missing Color
Cleaning blade failure
Discharge marks
•
Dropped or missing color planes
•
•
Completely missing color plane
•
T2 not in contact
•
Cleaning Blade not latched
•
Toner explosion
•
Cleaning Blade ghost (cleaning fail)
•
Oil stains and cooling marks
4.
Seldom seen
•
•
Fine pitch banding
Wavy brush pattern
•
•
OPC surface contamination
Front or rear edge drop out
•
•
Fuser flats
Thin white line in black
•
•
ITB drive gear slip
Yellow dots
•
•
Dunes
Fuser offset
•
Belt wave
5.
Seldom, if ever, seen
•
•
Fuser Wrinkles
Arc – T2 bushing
•
•
Process Cartridge Drag
Mottled Halftones
•
•
Toner Agglomerations
Arc – Post Charger Corona
•
•
T2 Backing Roller
Beautiful Arc
Contamination
T2 Not Raised (flock of birds)
•
Other defects with no samples
•
PQ Defect Guide – 3
NPI Fall 2003
© 2003 Hewlett-Pac kard Company HP CONFIDENTIAL
868236067.068.png
print quality defects
Print Quality Assessment, page 1
PQ Defect Guide – 5
NPI Fall 2003
© 2003 Hewlett-Pac kard Company HP CONFIDENTIAL
868236067.069.png
hp color LaserJet 9500
Print Quality Assessment, page 2
PQ Defect Guide – 6
© 2003 Hewlett-Pac kard Company HP CONFIDENTIAL
NPI Fall 2003
868236067.070.png

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