Scratches Parallel To The Long Axis Of Printing, Particularly With Film; Printing Too Light Or Too Dark - Tektronix PHASER 840 Service Manual

Scratches parallel to the long axis of printing, particularly with film
3. Clean the stripper fingers or the rapid release guide.

Printing too light or too dark

1. Make sure the printer is correctly reading the type of tray installed and
that the tray is correctly set for the media loaded in it. Printing on paper
in transparency mode significantly darkens a print. Try a different color
correction setting.
2.
Perform the procedure, "Printhead-to-drum spacing adjustment
(Phaser 840 printer)" on page 102.
3.
Verify that the printhead setting "Head Adjust," in the hidden service
menu is set to 128.
70 Phaser 840 and 850 Color Printers
Usually caused by foreign debris in the
paper path. The scratch extends into
non-printed areas.
1.
Run a transparency through the
manual feed to see if the scratch
appears on the print. If it does not,
the scratch occurred in the paper
pick and early transport of the
transparency film.
2. A scratch or smear can be caused
by debris built up on the paper
preheater heating surfaces. Run
the front panel cleaning procedure
Remove Ink smears. Force a sheet
of thick 65- to 80-lb. paper through
the paper preheater to "buff" the
paper preheater heating surfaces.
With the leading and trailing ends
of the sheet of paper extending
from the entry and exit of the paper
preheater, gently pull the sheet of
0388-68
paper back and forth several times
and then remove the sheet of paper.
Be careful of the paper-sensor flags.