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Service Guide
71
White portion of print is colored
Color on a print where no color should
be printed is often called a latent
image. A latent image remains on the
drum when it should have been
transferred to its sheet of paper. An
insufficient amount of oil on the drum,
provided by a dirty or defective or old
maintenance drawer may be the
problem.
1.
Clean the wiper blade of the drum
maintenance drawer. If necessary,
replace the maintenance kit.
2.
The paper preheater may be
contaminated with ink. Clean for
ink smears using the front panel
Troubleshooting function Remove
Ink Smears
.
3.
Run diagnostics to ensure that
printer temperatures are in
tolerance. Ensure that the drum
heater is properly positioned.
Print using a smoother, laser
quality paper. Some recycled
paper brands may be too rough.
4.
Dark rectangular marks on transparency film can be caused by an
accumulation of paper dust and oil on the feed rollers. Run 2 or 3
sheets of blank paper through the printer to clean the rollers or
manually clean the rollers.
5.
Replace the power control board.
6.
Non-functioning printhead data cable. Replace the main board.
7.
Replace the printhead.
0388-69
Summary of Contents for Phaser 840
Page 11: ...xii Phaser 840 and 850 Color Printers ...
Page 65: ...54 Phaser 840 and 850 Color Printers ...
Page 101: ...90 Phaser 840 and 850 Color Printers ...
Page 125: ...114 Phaser 840 and 850 Color Printers ...
Page 134: ...Service Guide 123 Clearing PostScript NVRAM menu item ...
Page 135: ...124 Phaser 840 and 850 Color Printers ...
Page 166: ...Service Guide 155 Figure 1 Cabinet FRUs 7 5 6 8 1 2 4 0388 21 3 9 9 ...
Page 170: ...Service Guide 159 Figure 3 Paper path FRUs 0388 80 2 1 5 11 10 9 12 6 4 3 7 13 8 11a 11b ...
Page 172: ...Service Guide 161 Figure 4 Motor and fan FRUs 0388 14 7 4 3 5 6 2 1 ...
Page 174: ...Service Guide 163 Figure 5 Circuit board FRUs 4 3 5 2 1 9 7 6 8 10 11 13 0388 81 12 7a ...
Page 176: ...Service Guide 165 Figure 6 Solenoid and clutch FRUs 4 5 3 2 1 0388 23 ...
Page 182: ...Service Guide 171 Figure 9 High capacity PaperTray 0388 65a 1 2 ...