Tektronix Z780GN - Phaser 780 Graphics Color Laser Printer Advanced Features And Troubleshooting Manual page 42

3
Troubleshooting
Print Quality Problems (And Examples) (cont'd.)
Print shows small, random light or dark spots in a
single color.
Prints are missing fine-line detail.
Prints have dull, faded colors.
Image is very faded or pieces of the image are
missing; toner on the page is loose.
Images are offset or ghosted.
Photographic images appear grainy or mottled.
34 Phaser 780 Color Laser Printer
Replace the color toner cartridge.
Refer to the % Remaining gauge for the imaging unit on the
Consumables Page. The imaging unit may need to be replaced.
If you are using a media tray, make sure that you have loaded
the correct media in the
PAPER
If you are using the Multi-Purpose Tray, make sure that you have
selected the correct media type in the printer's front panel.
Print the Consumables Page and Service Print 1 from the front
panel's Help Pages.
If all colors are faded on the four-color Service Print 1, the
imaging unit may need to be replaced. Refer to the
% Remaining gauge for the imaging unit on the Consumables
Page.
If one color is faded, replace the toner cartridge.
Make sure that the imaging unit stays covered until immediately
before installing it in the printer. Exposure to light can damage
the imaging unit and will produce streaks or faded prints.
Make sure that the toner cartridges are installed correctly.
Make sure that you use high-quality laser paper. See the User
Guide for recommended media types, weights, and sizes.
Use only Tektronix transparencies. Tektronix does not guarantee
the results of non-Tektronix transparencies in Tektronix printers.
Try a different color correction mode.
When using the Multi-Purpose Tray, make sure that you have
selected the correct media type in the printer's front panel menu.
Make sure that the paper guides are set flush against the media
in the paper trays.
Make sure that specialty media is used only in the multi-purpose
tray.
Reseat the fuser roll cartridge.
The fuser roll cartridge may be depleted. Replace fuser roll
cartridge.
If you are making more than 500 prints per day, order the
Hi-duty Fuser Roll Cartridge.
Check your driver or application print settings. Turn off Image
Smoothing; in your application turn off Finepoint.
tray or tray.
TRANSPARENCY