19: Yellow Solid Fill; 20: Ohp Color Bands - Xerox Phaser 840 Service Manual

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 4-154. 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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5 - 170 Phaser 840/850/860/8200 Color Printer - Service Manual