Problem-solve diagrams
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Repetitive image defects
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Interface connectors
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Formatter connectors
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Fax card
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Solenoids
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Switches and sensors
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Rollers and pads
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PCAs (base unit)
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Major components (base unit)
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Scanner and ADF
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Circuit diagram (1 of 2)
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Circuit diagram (2 of 2)
Repetitive image defects
If the product output has a consistent, repetitive defect, then use Table 7-8 Repetitive image defects
on page 259 to determine which part needs to be replaced based on the measured distance between
the repetitions of the defect.
NOTE: The following table replaces the graphical repetitive defect ruler. You can make your own ruler
by using these measurements.
Table 7-8 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 (see Registration-roller
assembly on page 161).
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 (see Fuser on page 147).
69.0 mm (2.72 inches) Pressure roller Replace the fuser (see Fuser on page 147).
75.4 mm (2.97 inches) Photosensitive drum Replace the print cartridge.
ENWW Problem-solve diagrams 259
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