I have a problem with ghosting on a Xerox Phaser 6360. Have replaced the Transfer Roller, Imaging Unit, and Fuser. It looks like the problem is mainly in Magenta. This is not a repeating defect, but a ghost image. Thanks.

Are you sure it is not a NVRAM error you are recieving?

If yes, remove the IMAGING UNIT.
Close the door and Power On.
Msg gone? If yes, replace IMAGING UNIT.

If no, remove the FUSER unit.
Close the door and Power On,
Msg gone? If yes, replace FUSER.

If not, it is the ENGINE BOARD.

The lid lifts a lever on the right side of the printer that moves a set of gears that releases the imaging unit. If the lever is broken or disconnected, it will not release. You may have to remove the right side panel to resolve it. You have to release the top, by removing 4 screws, and then the panel will release.

Replace photosensitive drum, which is a consumable part & has to be replaced when it is at the end of life.

No reset for imaging unit, only when you change it(autoreset).

You can reset Fuser and Transfer Roller this way:

To reset the fuser and transfer roller life usage from the printers control panel:
a. From the main menu select, Menu-Setup --> Maintenance --> Check other.
b. Select the appropriate part name from the list by using the Up Scroll and Down Scroll buttons
c. Select Reset.

I had replaced the fuser - no improvement. I removed the fuser, imaging unit & transfer roller. CAREFULLY using a vacuum cleaner I cleaned all units and the internals of the printer, rotating the roller on the imaging unit to clean all parts. (Warning Place Imaging unit on paper as toner escapes) After a few test prints the page cleared and duplicate ghosting cleared.

Most common cause of this is the use of 3rd party toner. This isnt true for all printers but some of the newer Xerox are notorious for it as the 3rd party toners are not produced to the exact specs as xerox. If your not using genuin Xerox toner you have your cause.
If your mechanicaly savy you can completely dissasemble most of the printer in order to clean out the toner. Then start over with new Xerox toner cartridges. I have had to service 2 of these printers in this way, and both were like new when done.

Is it a ghost of the image or just a repeating defect? In the menu, there is a repeating defect information page that you can print out. Depending on the spacing of the defect, you can determine which component it is.

XEROX 6200 DP Printer doesn't print from DOS base program in windos XP. Printer is connected with parallel port

That really sounds like the imaging unit cleaner has an issue.
If you have one try the imaging unit, I really suspect that is your problem.
Black is Faded or Missing Step 1 Clean the Laser Windows and Remove Excess Toner From the Imaging Unit Step 2 Check or Replace the Imaging Unit Gear Retaining Pin Step 3 Replace the Imaging Unit (installation instructions)
See if this link works. Xerox is infameous for these not working.
http://office.support.xerox.com/SRVS/CGI-BIN/WEBCGI.cgi/,/?St=842,E=0000000000019251353,K=6024,Sxi=13,Case=obj(19377)

How Brave is Jan?

Doubt it be the fuser(100 000life), "just magenta dots".... fuser would be "all smudged" or "black marks" , "the print rubs off" , "paper is creasing or jamming"

Can prove it by stopping a print (open door) when paper is1/2 way threw machine, you need to stop it before it goes threw the hot bit, so you can tell if the hot bit (fuser) puts the marks on the paper.

Transfer roller one would expect to effect whole print Smudged/Faint,uneven density

It will be the imaging unit ( 30 000 pagelife Ouch$ ) or possible leaking toner (if aftermarket)

Remove imaging unit and inspect film you should find image of lines, dots are usually chips or sticky stuff on drum surface, carefull no oily human fingers on surface please.

When stopping machine mid print and perfecting your timing, pull out the imaging unit and look at replica of your print notice if marked and where.

Hope this helps