Printing And Print Quality Problems; Not Printing; Streaks Or Lines Across The Print - Tektronix PHASER 840 Service Manual

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

Not printing

The printer processes a sheet of paper, but no image is printed on it.
1. No drive voltages to the printhead. Check for a loose connector
leading to the printhead.
2. Replace the power control board.
3.
Refer to the topic "Evaluating the printhead and cap/wipe/purge
system" on page 80. A properly functioning printhead maintenance
system is essential for proper printhead operation.
4. Replace the printhead.

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.
Service Guide
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