Tektronix Phaser 840, Service Manual

Page: 199 / 207

188 Phaser 840 and 850 Color Printers
19: 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 110. As a last
resort, replace the drum/transfix
assembly.
20: OHP 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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