Reference Roller Distance between defects Replacement part
6 Fuser 94.0 mm (3.75 inches) Fuser
7 Photosensitive drum 94.2 mm (3.75 inches) Print cartridge
NOTE The developing cylinder circumference is 62.83 mm (2.5 inches). A defect that is
related to the developing cylinder will most likely repeat at intervals of 54.0 mm (2.15 inches)
because of the way the roller is geared.
To identify if the print cartridge is the problem, insert a print cartridge from another
HP LaserJet 4345mfp, if one is available, before ordering a new print cartridge.
If the defect repeats at 94.0 mm (3.75 inch) intervals, try replacing the print cartridge before replacing
the fuser.
Table 7-19 Repetitive defects (continued)
Image-formation troubleshooting 393
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