HP Color LaserJet CP6015dn User Manual

Solve image quality problems
This section helps you define print quality problems and what to do to correct them. Often print quality
problems can be handled easily by making sure that the product is properly maintained, using paper
that meets HP specifications, or running a cleaning page.
Example print quality problems
Some print quality problems arise  from use of inappropriate paper.
● Use paper that meets HP paper specifications.
● The surface of the paper is 
too rough. Use paper that me ets HP...

(0)
(40mm) (36mm)
(50mm)
(71mm)
 (94mm)
(144mm)
(148mm) (82mm)
36 mmDeveloper roller in an image drum.
The print quality defect will be in one of the four image drums (image drum).
40 mmCharge roller in an image drum.
The print quality defect will be spots or dots sometimes caused when feeding labels and will be in one of the four
image drums (image drum).
50 mmTransfer 1 roller in the transfer unit (transfer kit).
71 mmTransfer 2 roller in the roller kit (transfer kit).
82 mmTension in the transfer unit...

144 mmPressure roller in the fuser (fuser kit).
148 mmFusing roller in the fuser (fuser kit).
To identify if the image drum is the problem, insert an image drum from another HP Color LaserJet
CP6015 series, if one is available,  before ordering a new image drum.
If the defect repeats at 94.0 mm (3.75 inch) intervals, try replacing the image drum before replacing the
fuser.
Overhead transparency defects
Overhead transparencies might displa y any of the image quality problems that any other type of paper...

If following the procedures do not improve print quality, go to www.hp.com/support/cljcp6015.
Use supported paper
Using unsupported paper or  other media in the product can cause a wide variety of image quality
problems. For a list of supported paper types, see 
Supported paper types on page 89 .
Calibrate the product
Calibration is a product function that optimizes print quality. If you experience any image-quality
problems, calibrate the product.
1. Press  Menu.
2. Press the down arrow 
 to highlight...

6.Select the paper type that best matches th e paper that is loaded in the product.
Use the table below to help select the best type  in the driver. The table maps the default settings
for specific paper types to the ty pes that are listed in the driver and on the product control panel.
For example, if you are using glossy paper that is 125 g/m
2, the type that would be selected in the
printer driver is XHVY Glossy 131-175 g/m2.
Standard paper types and weightsPaper types that can be selected from the...

A CLEANING  message appears on the product control pane l display while the cleaning is taking place.
In order for the cleaning page to work correctly, print the page on copier-grade paper (not bond, heavy,
or rough paper). A blank page will be printed when the task is complete. Discard the page.
Create and use the cleaning page 1.Press  MENU.
2. Press the up arrow or down arrow 
/ to select  CONFIGURE DEVICE, and then press the
checkmark button 
.
3. Press the up arrow or down arrow 
/ to scroll to...

Clean the registration second transfer assembly1.Open the right door.
2.Locate and remove the cleaning brush.
3.Lift the green handle on the transfer-access panel and open the panel.
1
2
ENWW Solve image quality problems 243
 

4.Clean the media sensor with the cleaning brush.
5.Close the transfer access panel, and replace the cleaning brush in its holder.
6.Close the right door.
244 Chapter 12   Solve problems ENWW
 

Use manual print modes
Try the following manual print modes to see if they solve the image quality problems. These options can
be found in the Optimize sub-menu under the control panel Print Quality menu. See 
Print Quality menu
on page 22.
● PAPER CURL
: The REDUCED  setting decreases full speed to 10 PPM (instead of 40 PPM) and
3/4 speed to 7.5 PPM (instead of 30 PPM) in order to reduce paper curl problems.
● PRE-ROTATION
: Set this feature to  ON if horizontal streaks appear on pages. Using this...

●PRE-ROTATION
: Turn this feature  ON if horizontal streaks appear on pages. Using this feature
increases the warm-up time for the device.
● TRACKING CONTROL: Improves color stability by adjusting the bias voltage. Make sure this mode
is set to 
ON.
Print-quality-troubleshooting pages
Use the built-in print-quality-troubl eshooting pages to help diagnose and solve print-quality problems.
1. Press Menu.
2. Press the down arrow 
 to highlight DIAGNOSTICS, and then press the checkmark button .
3. Press the...