Print-quality troubleshooting tools
Repetitive defects ruler
If defects repeat at regular intervals on the page, use this ruler to identify the cause of the defect. Place
the top of the ruler at the first defect. The marking that is beside the next occurrence of the defect
indicates which component needs to be replaced.
Figure 7-41 Repetitive defects ruler
0 mm
27 mm
32 mm
44 mm
66 mm
63 mm
92 mm
105 mm
76 m m
77 mm
78 mm
80 mm
49 mm
75.5 mm
50 mm
Distance between defects Product components that cause the defect
27 mm Print cartridge: primary charge roller
32 mm Print cartridge: developer roller
44 mm Printer: primary transfer roller
49 mm Print cartridge: RS roller
50 mm Printer: secondary transfer roller
63 mm ITB: secondary transfer backing roller
66 mm Printer: distance from secondary transfer roller to fuser
75.5 mm Print cartridge: OPC drum
76 mm ITB: driven roller
77 mm Fuser sleeve
358 Chapter 7 Solve problems ENWW
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