hp-support-head-portlet

Actions
Loading...
HP Customer Support - Knowledge Base

hp-contact-secondary-navigation-portlet

Actions
Loading...

hp-share-print-widget-portlet

Actions
Loading...
  • Information
    We are upgrading our website

    If you experience errors during this time, please try again later. 

hp-concentra-wrapper-portlet

Actions
Loading...

HP Color LaserJet CM6030 and CM6040 MFP - Copies of gray appear slightly purple.

Overview

Copies of low coverage gray areas may appear slightly purple or green.
Users note that the printed page has printed the gray output correctly and that normal print is good. They can also note the scanner hardware might be okay because the scan to PDF or JPG show gray on the monitor screen.
The reason the prints, scans and copies may appear different is that different processing is used for each path.
A copy is scanned and printed and the copy pipeline uses composite print tables (mix of magenta, cyan and yellow toner) to produce grays to make the copy less grainy. The purple hue is most common, which means the engine is using more magenta than any other color when making composite gray or black.

Example

The first image is the printed page, the second image is the copied output.
Figure : Color change example

Calibration process

During calibration the printer places a specific pattern of toner on the surface of the ITB.
The sensors at the end of the ITB read the toner pattern to determine if adjustments are necessary.
    Figure : ITB toner pattern for calibration
  1. Registration/image density sensors
  2. Toner pattern

Instructions

  1. Make sure the toner cartridges are not reporting low because engine calibrations will fail when there is not enough toner to make the patches correctly.
  2. Run a full engine calibration.
    1. From the control panel open the following menus:
      • Administration
      • Device Behavior
      • Calibration/Cleaning
    2. Select Full Calibration.

hp-feedback-input-portlet

Actions
Loading...

hp-feedback-banner-portlet

Actions
Loading...

hp-country-locator-portlet

Actions
Loading...
Country/Region: Flag United States

hp-detect-load-my-device-portlet

Actions
Loading...