HP laserjet 2015 series Manuale Di Servizio

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Troubleshooting tools and reference diagrams
Repetitive image defects
If the printer output has a consistent, repetitive defect, then use 
Table 7-6 Repetitive image defects
on page 179
 to determine which part needs to be replaced based on the measured distance between
the repetitions of the defect.
Table 7-6
  Repetitive image defects
Distance between identical
defects
Dirty or damaged roller
Solution
37.7 mm (1.48 inches)
Primary charging roller
Replace the print cartridge.
43.0 mm (1.69 inches)
Registration roller
Replace the registration assembly.
44.0 mm (1.73 inches)
Developing cylinder
Replace the print cartridge.
46.2 mm (1.82 inches)
Transfer roller
Replace the transfer roller.
56.5 mm (2.22 inches)
Fuser film
Replace the fuser.
69.0 mm (2.72 inches)
Pressure roller
Replace the fuser.
75.4 mm (2.97 inches)
Photosensitive drum
Replace the print cartridge.
ENWW
Troubleshooting tools and reference diagrams
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