Tektronix Phaser 780 Color, Справочное руководство по обслуживанию

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Service Guide
49
11. Inspect the image on the paper just before the paper enter the fuser. Is
there a normal test print image, without any band deletions, visible on the
sheet of paper? If not, replace the second bias transfer roller.
12.
Generate a test print and slide the fuser assembly out of the printer just as
the sheet of paper exits the fuser.
13.
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 band deletions after it exits the fuser? If
yes, replace the oil roll cartridge.
14.
Generate a test print.
15.
Inspect the image on the sheet. Is the image now normal, without band
deletions as it exits the fuser? If no, replace the fuser.
Missing bands in parallel to the leading edge
There are areas of the image that are
extremely light or are missing
entirely. These missing areas form
wide bands that run across the page
parallel with the leading edge of the
print, perpendicular with the
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.
1. Inspect the paper that is loaded in the paper tray. Is the paper wrinkled,
dimpled, or show any signs of having a high moisture content?
2.
Print Service Print 1. Do the bands appear in all four colors, If yes, go to
Step 3, If not, go to Step 11.
3.
Generate a test print and open the front cover just before the sheet of
paper enters the fuser.
4. Remove the imaging unit.
3041-41
Leading Edge