Tektronix Z780GN - Phaser 780 Graphics Color Laser Printer Advanced Features And Troubleshooting Manual page 43

Print Quality Problems (And Examples) (cont'd.)
Streaks or spots
The back of the printed page appears dirty.
If you can't make a print
Symptom
Printer not operating
Solution
Make sure that you plugged in the printer and turned it on.
Make sure that you connected the interface cable(s) properly.
Print Service Print 1 from the front panel to verify that the controller board is functional.
Verify that your printer can communicate:
If you have a Macintosh
Make sure that you have the correct PPD file installed and selected and that you have
selected the printer in the Chooser. If the printer's name does not appear in the
Chooser, your network connection may be faulty.
You can use the Print Window command in the Finder to send a file to the printer without
using an application. If the communication link between your computer and the printer is
working, the printer produces a directory listing of the active window on the desktop.
If you have a PC
Type this DOS command:
echo %! > port
echo showpage [Ctrl-D] > port
Where [CTRL-D] indicates pressing the D key while holding down the CTRL key.
Substitute the name of the printer port (for example LPT1:, LPT2:) for the variable port in
this command. For example, if you are testing a parallel connection on LPT1, type:
echo %! > lpt1:
echo showpage [Ctrl-D] > lpt1:
If the communication link between your computer and the printer is working, the printer
ejects a blank page. If this occurs, but you cannot print from your application or through
Windows, make sure that the appropriate driver is installed and that you have selected
the printer correctly.
If the printer does not respond by printing a page from the computer but does print from
the front panel, suspect your network. If the printer will not print from the front panel, call
Customer Support.
Most spots are caused by fingerprints or dust introduced into the
printer while installing the Imaging Unit or loading media.
Make sure that the surface where you unpack the imaging unit,
paper, and transparencies is free of dust. Keep supplies in a
covered area or a closed box.
Make sure that the imaging unit stays covered until immediately
before installing it in the printer. Exposure to artificial light for
more than 3 minutes or direct sunlight for 30 seconds can
damage the imaging unit.
Do not touch the right side or underside of the imaging unit;
fingerprints affect print quality.
Make sure that the media is clean.
Make sure that you handle the media on the outside edges to
avoid fingerprints.
To get rid of fingerprint spots, print 20 prints to clear.
Toner particles have contaminated the transfer roller. This can
happen if the printed image is larger than the media (for example,
when printing on envelopes). Run 10-20 prints to clean the
transfer roller.
Advanced Features and Troubleshooting Manual
3
Troubleshooting
35