Xerox Phaser 840, Руководство по обслуживанию, Страница: 180 / 287

5 - 164 Phaser 840/850/860/8200 Color Printer - Service Manual
7: Manuf. Dot position
(scanner)
Printhead diagnostic. This print is used for
manufacturing and engineering evaluation of
printhead performance.
8: YMCKRGB Solid Fills
These seven prints show uniformity of fill.
Look for: Even, uniform fills throughout each
print. Wrinkles or deformity of the paper itself
caused by the print process show up in
duplexed solid fill prints at Standard or
Enhanced resolutions. To test for wrinkling, print
the YMCKRGB prints in duplex mode at the
Standard resolution.
Causes: Weak jets or uneven drum heating
may cause uneven fills.
To solve wrinkling, try different print media.
Replace the drum maintenance drawer to
correct streaking.
Check the drum temperature sensor for debris
build-up on the sensor. Check to see if the
sensor is in improper contact with the drum.
Refer to the
Reverse Text test print.
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.
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