Tektronix Z740/DX - Phaser 740 Extended Color Laser Printer Instruction Manual page 92

4
Troubleshooting
Printed colors are not what you expected (cont'd.)
Symptom
Image is very faded or pieces
of the image are missing;
toner on the page is loose.
Photographic images appear
grainy
Streaks or spots
The back of the printed page
appears dirty.
Black-and-white prints
instead of color
Black-and-white prints
instead of color
Blue colors look too purple
82 Phaser 740 and 740L Laser Printers
Solution
When using the Multi-Purpose Tray, make sure that you have selected the correct media
type in the printer's front panel menu.
Check the front panel's Print Quality menu. If the selected mode is
Presentation, change it to Standard.
The Presentation print-quality selection in the front panel substitutes Presentation
mode rendering when Standard mode is selected in the driver.
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 light for more than 90 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 a few prints (you can print any of the Help Pages in the
front panel menu).
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.
In the front panel's Printer Defaults menu, check the default setting for Print
Mode. If it is set to Black Only, change the setting to Color.
If your printer is a Phaser 740L printer (check the nameplate on the front of the printer), it
will only print in black and white until you add color with the 740LCS Color Kit.
Macintosh users
Make sure that you are using the correct PPD file with the latest Apple LaserWriter
printer driver (version 8.3.4 or higher), which supports color PostScript.
Make sure that Color/Grayscale is selected in the Print dialog box. Some applications
require special files to print in color. Make sure that these files are properly installed. For
information, refer to the topics on the printer's CD-ROM or the Tektronix World Wide Web
site.
Make sure that you have not selected Fast Monochrome or Premium Monochrome in
the Print Quality dialog box.
PC users
Be sure to use a driver that supports color PostScript.
If you are using Windows, make sure that the Color box in the Options dialog box is
checked. For information on the drivers, refer to the printer's CD-ROM or World Wide
Web topics.
Make sure that you have not selected Fast Monochrome or Premium Monochrome in
the Tektronix Printer Features dialog box.
If you are not using a driver, make sure that you have not set the monochrome mode
selection code; make sure that the front panel is not set for Fast Monochrome or
Premium Monochrome.
If printed blue colors look too purple, print your document with the Vivid Color color
correction. Refer to page 118 for information on color corrections.