hp 3600n

[krm]

The colors mix improperly, the cyan prints with magenta shadow and repeating image. It happens before fuser and black prints well.

[mo0651]

Print a status page. See if anything is due to be replaced. What is the page count. Sounds like bad drum or transfer. Are you using OEM cartridges?

[prntrfxr]

check your event log see what you see.

do a half page test. - is it occurring before it goes into the fuser?
more than likely its a transfer belt though.

[krm]

Thanks to all replies. It happens before fuser, I will recommend belt.

[prntrfxr]

print a configuration page and you will see what looks like little L's in the corner. Each L will be a different color and should be the same distance. The movement of the color you are seeing could be related to color plane registration. Clean the color plane registration sensor and density sensor. Clean all the cartridge contacts and replace any suspect cartridge. Failure of this sensor will cause 54 errors (check event log), blurred images or offsetting of color/s.