Streaks Parallel With The Leading Edge - Tektronix Z780N - Phaser 780 Color Laser Printer Reference Manual

10.
Turn the carousel frame and inspect the magnet roller of each of the four
developer assemblies. Do the magnet rollers of each developer assembly
appear smooth, evenly formed, without any low spots, and without
obvious contamination? If not, replace the defective developer assembly.
11.
Replace the high voltage power supply.

Streaks parallel with the leading edge

Leading Edge
streaks appear in all colors? If not, go to Step 8.
2.
Print Service Print 4 and open the front cover just before the sheet of paper
enters the fuser.
3.
Remove the imaging unit.
4. Inspect the image on the drum. Is there a normal test print image, without
any horizontal streaks, visible on the drum? If yes, go to Step 4. If not,
replace the imaging unit.
5.
Inspect the image on the surface of the accumulator belt. Is there a normal
test print image, without any streaks, visible on the surface of the
accumulator belt? If no, replace the accumulator belt. If yes, inspect the
accumulator belt cleaner's plastic shield for damage; replace the belt
cleaner, if necessary. Replace the second bias transfer roller.
6.
Print Service Print 4 and slide the fuser out of the printer just as the sheet
of paper exits the fuser.
7.
Inspect the image on the sheet of paper just after the paper exits the fuser.
Is there a normal test print image on the sheet of paper before entering the
fuser but the image has visible streaks after it exits the fuser? If yes,
replace the fuser roll cartridge. If streaks continue to occur, replace the
fuser.
52 Phaser 780 Color Printer
There are dark lines running parallel
with the leading edge of the print,
perpendicular to direction of paper
travel (B-size print shown). The
printer displays no error code.
Note A-size prints are processed
through the printer with the
short edge of the print parallel to
the direction of the paper path
making print artifacts parallel to
the long edge of the print.
In B-size prints are processed
through the printer with the long
edge of the print parallel to the
paper path making artifacts
parallel to the short axis of the
print.
3041-43
1.
Print Service Print 1. Do the