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 paper specifications.
● The printer driver setting or paper tray setting might be incorrect. Be sure that you have configured
the paper tray at the product control panel and hav
e also selected the correct driver setting for the
paper that you are using.
● The print mode might be set incorrectly, or the paper might not meet recommended specifications.
● The transparencies you are using are not designed for proper toner adhesion. Use only
transparencies designed for HP Color LaserJet products.
● The moisture content of the paper is uneven, too hi
gh, or too low. Use paper from a different source
or from an unopened ream of paper.
● Some areas of the paper reject toner. Use paper from a different source or from an unopened ream
of paper.
● The letterhead you are using is printed on rough paper. Use a smoother, xerographic paper. If this
solves your problem, consult with the printer of yo
ur letterhead to verify that the paper used meets
the specifications for this product.
● Several optimize print modes can be used to address print quality issues. See 
Print Quality menu
on page 22.
Repetitive defects ruler
If defects repeat at regular intervals on the page, use 
this ruler to identify the cause of the defect. Place
the top of the ruler at the first  defect. The marking that is beside the next occurrence of the defect
indicates which component needs to be replaced.
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							(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 (transfer kit).
94 mmImage drum.
The print quality defect will be in one of the four image drums (image drum).
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							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
could display, as well as defects  specific to transparencies. In add ition, because transparencies are
pliable while in the print path, they are subject to being marked by the paper-handling components.
NOTE: Allow transparencies to  cool at least 30 seconds before handling them.
●On the printer driver’s Paper
 tab, select Transparency as the paper type. Also, make sure that
the tray is correctly conf igured for transparencies.
● Check that the transparencies meet th
e specifications for this product.
● If transparencies are sticking to
gether in the output bin, set MEDIA TEMP to REDUCED from the
print quality menu. See 
Use manual print modes on page 245 .
● Handle transparencies by the edges. Skin oil on
 the surface of transparencies can cause spots
and smudges.
● Small, random dark area
s on the trailing edge of solid fill pages might be caused by transparencies
sticking together in the output bin. Try printing the job in smaller batches.
● If the selected colors are undesirable when printed,
 select different colors in the software program
or printer driver.
● If you are using a reflective overhead projecto
r, use a standard overhead projector instead.
Print quality problems associated with the environment
If the product is operating in excessively humid or dry conditions, verify that the printing environment is
within specifications. See 
Environmental specifications on page 271. Several optimization modes can
also help with environmental conditions. See 
Use manual print modes on page 245.
Print quality problems associated with jams
● Make sure that all paper is cleared from the paper path.
● If the product recently jammed, print tw
o to three pages to clean the product.
● The paper does not pass through the fuser, causing image defects to appear on subsequent
documents. Print two to three pages to clean the product.
Optimize and improve image quality
The following procedures can be used to solve most image quality problems.
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							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  CONFIGURE DEVICE , and then press the checkmark button
.
3. Press the down arrow 
 to highlight PRINT QUALITY, and then press the checkmark button .
4. Press the down arrow 
 to highlight FULL CALIBRATE NOW , and then press the checkmark
button 
.
If this calibration procedure does  not fix the image quality problems , perform the following additional
calibration procedure.
1. Press  Menu.
2. Press the down arrow 
 to highlight  CONFIGURE DEVICE , and then press the checkmark button
.
3. Press the down arrow 
 to highlight PRINT QUALITY, and then press the checkmark button .
4. Press the down arrow 
 to highlight CALIBRATE NEUTRALS , and then press the checkmark
button 
.
Specify the correct paper type
NOTE: The steps can vary; this procedure is most common.
When you load a different paper type into the product, specify the type of paper you are using.
1.After loading the paper tray, specify the paper type at the control panel by using the control panel
buttons. For more information, see 
Load Trays 2, 3, 4, or 5 on page 93. Use the table below to aid
in selecting the best paper type. The same type is th en selected in the printer driver at the time of
printing.
2. When you send a print job fr om your computer, on the File menu in the software program, click
Print .
3. Select the product, and then click  Properties or Preferences .
4. Select the  Paper/Quality  tab.
5. In the  Paper Type  drop-down box, select  More... and then select the paper type that best matches
the paper that is loaded in the product.
If you are using the HP Color LaserJet CP6015 PCL 6 printer driver, select the  General Everyday
Printing  shortcut and select  Paper Type. If you are using the HP Universal Printing PS driver,
select the  Paper/Quality tab and then select  Paper Type.
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							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 printer
driver and control panel
● Normal
● Heavy 1
● Heavy 2
● Heavy 3
● Glossy 1
● Glossy 2
● Glossy 3
● Gloss Film
● OHTUnspecified
Light 1 60-74 g/m2Light 60-74 g/m2
Normal 75-90 g/m2Intermediate 85-95 g/m2
Heavy 1 91-120 g/m2Heavy 111-130 g/m2
Heavy 2 121-163 g/m2Extra Heavy 131-175 g/m2
Heavy 3 164-220 g/m2Cardstock 176-220 g/m2
Gloss 1 91-120 g/m2HVY Glossy 111-130 g/m2
Gloss 2 121-160 g/m2XHVY Glossy 131-175 g/m2
Gloss 3 161-220 g/m2Card Glossy 176-220 g/m2
Gloss FilmHP Tough Paper
OHTColor Laser Transparency
LabelLabels
EnvelopeEnvelope
Envelope 2Heavy Envelope
Designated 1 60-90 g/m2Rough
Designated 2 >91 g/m2Heavy Rough
Clean the fuser
Run the device cleaning page to keep the fuser fr
ee of toner and paper particles that can sometimes
accumulate. Accumulation of toner and particles can cause specks to appear on the front or back side
of your print jobs.
HP recommends that you use the cleaning pa ge when there is a print quality issue.
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							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 PRINT QUALITY , and then press the checkmark
button 
.
4. Press the up arrow or down arrow 
/ to scroll to PROCESS CLEANING PAGE , and then press
the checkmark button 
.
5. Discard the printed page. The task is complete.
Respond to control panel error messages
If you see a 54.ERROR   message in the event log, you might need to perform some maintenance
on the product to avoid more errors and to solve print quality problems.
1. Open and then close the right door of the product to log a  54.ERROR  as the latest event in
the event log.
2. Press  Menu.
3. Press the down arrow 
 to highlight INFORMATION, and then press the checkmark button .
4. Press down arrow 
 to highlight  DIAGNOSTICS , and then press the checkmark button .
5. Press the down arrow 
 to highlight PRINT EVENT LOG , and then press the checkmark button
.
6. Find the most recent event in the log.
● If the event is a 
54.OE.01 MEDIA SENSOR  event, a service technician needs to replace the
registration second transfer assembly. Contact HP Support at 
www.hp.com/support/
cljcp6015  and provide them with this error code.
● If the event is a 
54.OE.02 MEDIA SENSOR  event, you need to replace the product transfer
kit. Contact HP Support at 
www.hp.com/support/cljcp6015  and provide them with this error
code.
● If the event is a 
54.OE.03 MEDIA SENSOR  event, you need to clean the registration second
transfer assembly and the media sens or using the following procedure.
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							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
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							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.
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							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 feature
increases the warmup time for the product.
● FUSER TEMP
: If you are seeing a faint image of the page repeated at the bottom of the page or
on the following page, you should first make sure the Paper Type and Print Mode settings are
correct for the type of paper you are using. If yo u continue to see ghost images on your print jobs,
set the Fuser Temp feature to one of  the Alternate settings . Try the ALTERNATE 1 setting first
and see if it solves the problem. If you continue to see the problem, try  ALTERNATE 2 and then
ALTERNATE 3. With the  ALTERNATE 2 and ALTERNATE 3  settings you may see an extra delay
between jobs.
● TRAY 1
: Set the mode to  ALTERNATE if you are seeing marks on the back side of the paper when
printing from Tray 1. This increases the frequency of the cleaning cycle.
● GLOSS MODE: Set this feature to 
HIGH for glossy print jobs, such as photos, if you notice the
gloss finish decreasing after the first page is printed.
● LIGHT MEDIA
: Set this feature to  ON if you are frequently seeing  Fuser Delay Jam or Fuser Wrap
Jam messages, especially when printing on light-w eight paper or on jobs with heavy toner
coverage.
● MEDIA TEMP
: Set this feature to  REDUCED if you are having proble ms with paper sticking
together in the output bin.
● ENVIRONMENT: Optimizes performance in extreme low temperature environments. Set this
feature to 
ON if the product is operating in a low-temperature environment and you are having
problems with print quality such as blisters in the printed image.
● LINE VOLTAGE
: Optimizes performance in low-voltage conditions. Set this feature to  ON if the
product is operating in a low-voltage environmen t and you are having problems with print quality
such as blisters in  the printed image.
● CLEANING FREQUENCY: If you are seeing defects in the printed output that repeat at 38 mm
(1.5 inch) intervals, set this feature to 
ALTERNATE. This feature increases the frequency at which
the C roller is cleaned. Setting this feature to  ALTERNATE might also reduce printing speed and
increase the frequency of consumable replacement.
● D-BLADE BIAS
: If you are seeing short white vertical lines  in the printed output, set this feature
to ALTERNATE . The ALTERNATE  setting might also cause dark spots in the printed output, so
be sure to test this sett ing on a few print jobs.
● WASTE BIN
: Set this feature to 
A
LTE
 RNATE if you are seeing lengthwise toner streaks in your
printed output, especially in jobs with low toner coverage.
● BACKGROUND
: Turn this feature on if pages are printing with a shaded background. Using this
feature can reduce gloss levels.
● HEAVY MODE
: Sets speed to  30 PPM or 24 PPM  in order to better feed heavy paper.
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							●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 down arrow 
 to highlight PQ TROUBLESHOOTING , and then press the checkmark
button 
 to print the pages.
The product returns to the  READY state after printing the print-quality-troubleshooting pages. Follow
the instructions on the pages that print out.
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