Xerox Nuvera 100, Service Manual

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Troubleshooting 3-25
White Portion Of Image Is Dark
Ink on a print where no ink should be printed is often called a latent
image. A latent image remains on the drum when it should have been
transferred to its sheet of paper. An insufficient amount of oil on the
drum, provided by a dirty, defective or old maintenance roller may be
the problem.
1. Clean the wiper blade of the drum maintenance drawer. If
necessary, replace the maintenance kit.
2. Run diagnostics to ensure that printer temperatures are in
tolerance. Ensure that the drum heater is properly positioned.
Ensure that the customer is using Sterling-specified paper.
Some recycled paper brands may be too rough.
3. Replace the power control board.
4. Replace the printhead data cable.
5. Replace the main board.
6. Replace the printhead.
Grayscale Density Is Uneven
This may be due to poor thermal regulation in the printer, resulting
in uneven heating of the printhead, which in turn results in uneven
ink drop jetting.
1. Clean the wiper blade and the wick of the drum maintenance
drawer. Inspect the operation of the drum maintenance cam
roller and the left and right cam actuators it pushes against.
2. Perform the procedure, “Printhead-To-Drum Spacing
Adjustment” and “Transfix Roller Pressure Spring
Adjustment”.
3. Replace the printhead.
Not Printing
The printer processes a sheet of paper, but no image is printed on it.
If you do not get ink on the print, but you get ink in the waste liner
during a cleaning cycle, replace the printhead data cable.
If you do not get ink on the print or during a cleaning cycle:
1. Check the cap/wipe/purge performance.
2. Check for a loose connector on the power cable leading to the
printhead. Replace the printhead power cable.