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Troubleshooting the Printing System
7-67
Table 7-25. Repetitive Defects
Possible Cause Action
Toner Cartridge is
damaged. The
circumference of the
photoconductive
drum inside the toner
cartridge is 94 mm
(3.7 inches). If the
defect repeats at this
interval, the defect is
associated with the
drum.
Inspect the drum for scratches or damage. Replace
the Toner Cartridge.
Dirty Rollers. Any dirty
roller in the paper path
may result in a
repetitive print defect.
Examine and clean rollers in the paper path.
Fusing Assembly is
dirty or defective. The
circumference of the
lower fusing Pressure
Roller is 86 mm (3.46
inches). If the defect
repeats at this
interval, the defect is
associated with the
Pressure Roller.
Clean the Fusing Assembly using alcohol. If the
problem persists, replace the Fusing Assembly.
Gears are worn,
causing slippage or
jumping.
Inspect the gears driving the Toner Cartridge and the
Fuser. Replace the Main Drive Assembly if
necessary.
Paper does not meet
specifications: The
surface of the paper
may be too coarse,
causing repeated
marks.
Try a different paper lot (see
HP LaserJet Printer
Family Paper Specifications Guide
).