This can be caused by one of two things.
1. faulty wiper blade on your toner so that the previous image in not being wiped off the drum.
2. worn fuser sleve.
To work out which it is you will need to do a half stop test: print off a normal document then when it is about half way through the printer ( unfortunatly you may have to repeat this to get the timing right) open the front cover. remove the toner cartridge. if you can see the ghosting on the page the it is the toner. if its not there then its a new fuser. to save on money and if your confident enouh you may be able to just chane the fuser sleve depending on the state of the fuser on a whole.
hope this helps
feel free to email me if you have any other questions:
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