Tektronix Z740/DX - Phaser 740 Extended Color Laser Printer Instruction Manual page 85

Print quality problems (cont'd.)
Large light spot(s) appear
randomly in the print,
approximately on the same
horizontal and vertical place
or they move vertically from
one print to another.
A smear in the image repeats
at the same location on the
page.
One or more vertical, dark
and even fine lines appear on
the print through all colors.
Print several pages until the artifacts fade.
Replace the Imaging Unit.
Replace the Imaging Unit; make sure that the old Imaging Unit is not exposed to light for
more than 3 minutes.
If a new Imaging Unit does not correct the problem:
Put the old Imaging Unit back into the printer.
Repack the new Imaging Unit.
Replace the Fuser.
Fuser order numbers:
110 Volt: 016-1660-00
220 Volt: 016-1661-00
Advanced Features and Troubleshooting Manual
4
Troubleshooting
75