Tektronix PHASER 840 Quick Reference Manual page 153

18: Yellow Solid Fill. This prints shows
uniformity of fill.
Look for: Even, uniform fills throughout
the print. There should be no wrinkling or
deformity of the paper throughout the
print.
Causes: Weak jets or uneven drum
heating may cause uneven fills.
To solve wrinkling, try different print
media. Replace the drum maintenance
tray to correct streaking.
Check the drum-temperature sensor for
debris build-up on the sensor. Or the
sensor is in improper contact with the
drum. Refer to the test print Reverse
Text.
The transfix pressure may be incorrect.
Perform the transfix spring adjustment
described in "Transfix roller pressure
spring adjustment" on page 72. As a last
resort, replace the drum/transfix
assembly.
19: Color Bands This print consists of
sequential bands of primary and
secondary colors followed by a blue tint.
This print is used for manufacturing and
engineering evaluation of printhead
performance.
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Service Guide