Tektronix Phaser 840, Руководство по обслуживанию

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182 Phaser 840 and 850 Color Printers
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 110. As a last
resort, replace the drum/transfix
assembly.
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9923-119