Repeating Defect Or Voids On Print - Tektronix 1235N - Phaser Color Laser Printer Service Manual

Repeating defect or voids on print

This can usually be traced to a
dent-like defect in the developer
roller of the imaging drum unit in
question. Measure the spacing
between the spots. The distance
between the repeating spots
indicates the source of the problem.
In some instances, the spots may be
dark instead of white. They may
also be shaped something other
than round.
If the spots are about 115 mm (4
in.) apart, then the problem is a
defect on a fuser roller. Replace
the fuser.
If the spots are 57.8 mm (2.27
in.) the problem is with the
transfer roller of the transfer
belt unit. Replace the transfer
belt unit.
94.2 mm (3.7 in.): Imaging
drum. Replace the imaging
drum unit.
49 mm (1.9 in.): Developing roller. Replace the imaging drum unit of
the affected color.
57.8 mm (2.27 in.): Toner supply roller. Replace the imaging drum unit
of the affected color.
44 mm (1.7 in.): Charging roller. Replace the imaging drum unit of the
affected color.
54 Phaser 1235 Network Color Printer