HP Color LaserJet 2550L User Manual

Cleaning the printer
During the printing process, paper, toner and dust particles can accumulate inside the
printer. Over time, this buildup can cause print-quality problems such as toner specks or
smearing. This printer has a cleaning mode that can correct and prevent these types of
problems.
To clean the engine
NoteThe following procedure must be performed from the HP Toolbox. To clean the engine when
the computer is running an operating system that does not support HP Toolbox, see the late-
breaking...

Calibrating the printer
The printer automatically calibrates at various times. You can adjust the calibration settings
by using the HP Toolbox.
Environmental differences, aging print cartridges, aging toner, and an aging imaging drum
might cause fluctuations in image density. The printer accounts for this with image
stabilization control. The printer automatically calibrates at various times to maintain the
highest level of print quality. You can also request a calibration by using the HP Toolbox.
The...

7
Problem solving
This troubleshooting information is organized to help you resolve printing problems. Choose
the general topic or type of problem from the following list.
●
Resolving problems that did not generate messages
●
Checking the network
●
Solving general printing problems
●
Solving PostScript (PS) errors
●
Solving common Macintosh problems
●
Resolving problems that generated messages
●
Resolving the control panel messages
●
Clearing jams
●
Solving print-media problems
●
Solving print-quality...

Resolving problems that did not generate messages
If the printer is not responding properly, complete the steps in the following checklist, in
order. If the printer does not pass a step, follow the corresponding troubleshooting
suggestions. If a step resolves the problem, you can stop without performing the rest of the
steps on the checklist.
Troubleshooting checklist
1. Make sure the printer Ready light is on. If no lights are on, complete these steps:
a. Check the power cable connections.
b. Check that...

9. Print a short document from a different program that has worked in the past. If this
solution works, then the problem is with the program you are using. If this solution does
not work (the document does not print) complete these steps:
a. Try printing the job from another computer that has the printer software installed.
b. If you connected the printer to the network, connect the printer directly to a computer
with a parallel or USB cable. Redirect the printer to the proper port, or reinstall the...

Checking the network
It is recommended that you use the HP color LaserJet 2550 CD-ROM to install and set up
the printer on a network. Follow these steps to see if the problem is caused by the network.
●When you printed the Configuration page, an HP Jetdirect configuration page should
have printed if the printer is network-enabled. (If these pages do not print in your
language, see 
Special pages.) Verify that all network settings are properly configured.
For more information about the HP Jetdirect page,...

Solving general printing problems
In addition to the problems listed in this section, see Solving common Macintosh problems if
you are using a Macintosh computer, and see 
Solving PostScript (PS) errors if you are using
the PS driver.
The print job is extremely slow.
Cause
Solution
The job might be very complex (if it contains graphics, for
example).●Wait for the job to print.
●Reduce the complexity of the page or try adjusting the
print-quality settings. If this problem occurs frequently,
add memory to...

The printer pulls paper or print media from the wrong tray.
Cause
Solution
The Source (tray) selection might be incorrect.●For Windows, ensure that the Source is selected from
the Print dialog box (which is part of the program) if
possible or from the printer driver. If you select the
Source in the printer driver and then select a different
Source in the Print dialog box, the Source setting in the
printer driver changes to match the Source setting in
the Print dialog box.
●For Macintosh, set the Source...

The printer does not recognize a DIMM that is installed.
Cause
Solution
The DIMM is not recognized in the printer driver.Set the printer driver to recognize the DIMM. See Enabling
memory.
The DIMM is not properly installed.Remove the DIMM, and reinstall it.
The printer does not respond when the Print command is selected in the software.
Cause
Solution
The printer experienced an error.Check the control panel lights on the printer to determine if
an error exists.
If no control panel lights are on, the...

Pages print, but not all of the colors print, or the pages are completely blank.
Cause
Solution
If one color is completely missing, the sealing tape might not
have been removed completely from the print cartridge.Remove the print cartridge for the missing color and make
sure all the sealing tape has been removed completely.
If pages print completely blank, the file might have blank
pages.Check the file to see if it contains blank pages. Delete those
pages if they are unnecessary.
If you are using non-HP...