HP LaserJet Pro M1212nf HP LaserJet M1130/M1210 MFP User Guide - Page 223

Repetitive defects ruler, HP Customer Care.

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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. If the defect correlates with the print engine or the fuser, the product might require service. Contact HP Customer Care. Figure 12-1 Repetitive defects ruler 0 mm 27 mm 29 mm 39 mm 56 mm 75 mm Distance between defects 27 mm 29 mm 39 mm 56 mm 75 mm Product components that cause the defect Print engine Print engine Print engine Fuser Print cartridge ENWW Solve image-quality problems 209

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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.
If the defect correlates with the print engine or the fuser, the product might require service. Contact
HP Customer Care.
Figure 12-1
Repetitive defects ruler
0 mm
27 mm
29 mm
39 mm
56 mm
75 mm
Distance between defects
Product components that cause the defect
27 mm
Print engine
29 mm
Print engine
39 mm
Print engine
56 mm
Fuser
75 mm
Print cartridge
ENWW
Solve image-quality problems
209