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
Summary of Contents for Phaser 780 Color
Page 6: ......
Page 32: ...18 Phaser 780 Color Printer ...
Page 90: ...76 Phaser 780 Color Printer ...
Page 94: ...80 Phaser 780 Color Printer ...
Page 117: ...Service Guide 103 Removing the developer tie plate 780 5 82 Wire clamp Developer tie plate ...
Page 125: ...Service Guide 111 Removing the laser unit Laser unit Laser cover 780 5 47 ...
Page 150: ...136 Phaser 780 Color Printer ...
Page 156: ...142 Phaser 780 Color Printer Multi purpose tray cover FRUs 780 5 121 3 1 4 2 5 ...
Page 158: ...144 Phaser 780 Color Printer Multi purpose tray FRUs 1 4 2 3 7 6 5 8 9 780 5 122 11 12 13 10 ...
Page 160: ...146 Phaser 780 Color Printer Paper feeder cover FRUs 780 5 123 1 2 3 ...
Page 162: ...148 Phaser 780 Color Printer Paper feeder FRUs 1 2 3 5 4a 4b 6 7 780 5 124 ...
Page 164: ...150 Phaser 780 Color Printer Imaging FRUs 1 2 3 4 5 6 7 780 5 125 ...
Page 166: ...152 Phaser 780 Color Printer Developer FRUs 780 5 126 1 1 1 2 2 2 3 3 3 4 4 4 ...
Page 168: ...154 Phaser 780 Color Printer Carousel FRUs 4c 4d 5 4b 4a 3 2 1 780 5 127 6 ...
Page 172: ...158 Phaser 780 Color Printer Fuser assembly FRUs 1 2 3 780 5 129 4 ...
Page 174: ...160 Phaser 780 Color Printer Paper exit FRUs 780 5 130 1 2 3 3 3 3 3 ...
Page 178: ...164 Phaser 780 Color Printer Drive FRUs 780 5 132 1 2 3 4 6 5 9 8 7a 7d 7c 7c 7b ...
Page 182: ...168 Phaser 780 Color Printer Electronics front FRUs 780 5 134 2 4 5 6 3 8 9 7 1 10 ...
Page 184: ...170 Phaser 780 Color Printer Image processor FRUs 780 5 135 1 2 3 6 5 4 7 8 9 12 10 11 ...
Page 198: ...184 Phaser 780 Color Printer ...
Page 233: ...Service Guide 21 ...
Page 234: ...220 Phaser 780 Color Printer ...