Print problems My print is smeared especially if the print has color behind it.

It's not unusual for paper to hit the bottom of the print head, especially if the paper is bent. This can cause smearing. If you have pets, you can check for pet fur in the printer, or other foreign material inside that can also cause smearing.

Included general maintenance video and how to clear smears from the paper.

Solution: Remove Print Smears / Printing Fuser Cleaning Pages
7750 Support Knowledge Base Remove Print Smears Fuser Cleaning...

With Troublshooting highlighted on the printer display perform the following steps:

1. Press OK.
2. Press the Down Arrow and scroll to Print Quality Problems.
3. Press OK.
4. Press the Down Arrow and scroll to Remove Print Smears.
5. Press OK. The printer will print 5 cleaning pages.

Repeat this process five or six times, to remove stubborn toner buildup from the fuser.
Always make sure you are matching the type of paper loaded in the printer tray(s) to the correct Paper Type front panel setting. When you load a tray with paper, the front panel will ask you to indicate the type of paper you loaded. For correct print quality and printer operation, be sure to set this correctly.
MAINTENANCE:
Phaser 7750 Video Instruction Maintenance for the Printer Phaser

I am afraid that Dennis (Writing below) is correct, When you have smearing it is a print head problem and they need to be replaced, If you have had this printer for many years (HP GOOOD Printer) you should check prices on a new machine, the reason for that is that HP has discontinued support on many machines as of 1 Jan 2013, If you can find a print head for your system it may be half the price of a new machine, Also; if one print head is going it may not be long before you see the same problem on the one or more color print head. It is probably not what you were hoping to hear but right now HP has several really good systems on sale,

many times this problem is caused by the type of paper being used, especially with photos, try a different paper, or change the type of paper in the print box when you try to print. the amount of toner used is determined by the paper type. if you are printing on glossy paper you might get the smearing if you didn't tell the printer to print on "glossy" Anyway, this is most likely where to problem can be solved. good luck

Did you change the toner?Developer unit? When did it occured?

FIRST: the copier must be cleaned and vacumed, it may be that toner falls onto transfer section and that causes the problem, you may also have problem with yellow developing unit or drum or transfer cleaning blade.

Pls. rate

Appropriate cleaning procedures, as listed in the following tables, should be
performed when specific print-quality or paper transport problems occur.
All cleaning procedures are detailed in the printer’s Phaser 8400 Reference Guide or
the Phaser 8500/8550 User’s Guide.
Light Stripes or Missing Colors
Problem type Solution
Missing or light-colored
stripes on prints.
Select the automated procedure Eliminate Light Stripes from
the Control Panel.
Ink Smears, Oil Spots, or Random Ink Streaks
Problem type Solution
Ink smears on the front,
back, or edges of a page.
Select the automated procedure Remove Print Smears from
the Control Panel.
Check the maintenance kit for ink and paper-dust build-up on
the wiper blade.
Oil (drum fluid) on top edge
of print.
Select the automated procedure Remove Print Smears from
the Control Panel.

Hope this helps
pdouglasss

Okay, this was the problem I posted a few days ago. It's fixed now, so in case you have the same problem with smearing, here's what the help desk from Canon suggested: Open the cover and remove the ink cartridges. There is a gray lever in front of the cartridges. Lift this lever and the printhead can be easily removed.
Our printhead had a buildup of black ink on the surface. I carefully removed this with rubbing alcohol. I let the printhead dry and replaced everything. No more smearing. Imagine a help-desk that actually helped!

uninstall the driver of your machine .reinstall again use the cd driver to update

Our Dell AIO A940 stopped printing black ink (it went throught the motions but he paper came out blank). Finally got it to print by selecting:

PRINT, PROPERTIES, PAPER SETUP, SPECIALTY PAPER, PHOTO/GLOSSY

Maybe it will work for you! Good luck!

Check to see if you have a paper jammed near the drum near the color ink cartridge interface.