Tektronix 740L manual Quality

4 Troubleshooting

Print quality problems (cont'd.)

Thin horizontal stripes or a Increase the amount of memory.

“weave” pattern appears in a or complex image.

Print the image at a lower resolution.

Prints have dull, faded colors ■ If you are using a media tray, make sure that you have loaded the correct media in the PAPER tray or TRANSPARENCY tray.

■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 Color Reference Page from the front panel’s Calibrate Colors menu.

Check the density settings for each color and compare them to the examples on the

Color Density Samples card. (in the User Guide).

Print the Consumables Page and Service Print 1 from the front panel’s Help Pages.

■If all colors are faded on the Test Print, 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 (and you have checked and/or adjusted the density setting for that color), 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 light streaks or faded prints.

Make sure that the Toner Cartridges are installed correctly.

Image is very faded or pieces of the image are missing; toner on the page is loose.

Make sure that you use a high-quality laser paper: 60 - 90 g/m2 (16 - 24 lb.) paper in the media trays and 75 - 150 g/m2 (20 - 39 lb.) paper with the Multi-Purpose Tray. Refer to “All about media” on page 5 for more information.

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.

Photographic images appear	Check the front panel’s Print Quality menu. If the selected mode is Presentation,
grainy	change it to Standard.
Streaks or spots	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 3 minutes 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).
The back of the printed page	Toner particles have contaminated the transfer roller. This can happen if the printed
appears dirty.	image is larger than the media (for example, when printing on envelopes). Run
	10-20 prints to clean the transfer roller.

78Phaser 740 and 740L Laser Printers