Table 2-64 Image defects table (continued)
Problem Sample Cause Solution
ITB ghost image of calibration
marks.
NOTE: Orientation of the marks
depends on which way the page
travels through the paper path.
This defect occurs at the top,
bottom, or both areas of the
page. The defect prints as a
band/streak that stretches from
the leading edge to the trailing
edge of the page (process
direction).
The band/streak normally
shows all color planes (CMYK)
and most of the time has a
ghost image of the calibration
marks pattern in it.
If the ITB is removed after
performing a Full Calibrate Now
process, the surface of the ITB
might show the same band/
streak as that printed on the
paper.
The band/streak might
disappear after printing 10 to
20 pages, but might return after
the next calibration is
performed.
TIP: The event log might
contain a large number of 54
errors. This indicates calibration
failures. The product is using
the factory calibration values
and will print with an
acceptable print quality.
The ITB cleaning blade (which is
part of the ITB) might not be
making full contact with the ITB
belt resulting in the ITB not
being fully cleaned. A large
amount of 54 errors in the
Event Log can indicate that the
calibration sensors are
contaminated with toner when
the ITB is not properly cleaned.
1. Open, and then close the front
door at least 5 times to clean the
calibration sensors.
2. Replace the ITB.
3. If the error persists, escalate the
problem to the Global Business
Unit.
Bubbles or blisters on coated
paper.
Often occurs on coated paper in
a high humidity environment.
Moisture between the paper
and the coating pull apart
during the fusing process.
NOTE: More likely to happen
during a duplex print job.
Replace the paper with a unopened
package of paper that is acclimated to
the environment where the product is
operating.
Printing the job using an uncoated or
different paper.
Do the following:
1. From the Home screen on the
product control panel, scroll to
and touch the Administration
button.
ENWW Solve image quality problems 485
To Next Page
Loading...