Tektronix Phaser 840, Quick Reference Manual

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46
Phaser 840 Color Printer
Printing and print quality problems
Generally, print problems fall into the following six categories:
■
Streaks or lines in the prints
■
No printing
■
Printing too light or too dark
■
Poor quality printing
■ Image is offset or cut off
■
Wrinkling
Streaks or lines across the print
1.
Check the Y-axis belt tension. If the Y-axis drive is not smoothly and
consistently rotating the drum, horizontal bands or lines appear in the
print.
2. Replace the Y-axis motor.
3. Replace the power control board.
Streaks or lines down the print
1. Clean the blade of the drum
maintenance drawer.
2. Possible missing or weak jet.
Print the service test print
Weak/Missing Jet to determine
if a jet is not performing.
Perform up to three printhead
cleaning cycles to try to clean a
clogged jet.
3. If necessary, turn off the printer
and allow the printhead to cool
for 4 hours.
4. Test the vacuum system for
proper vacuum levels and
operation.
5.
Ensure that no wiring harnesses
are interfering with the
horizontal slewing of the
printhead. In such a case, the
streaks or lines should be
parallel and evenly spaced.
6. Check for media in the exit path.
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