Ricoh MP C6501-background in non-image area

[roblin]

Hello,

i have started working on a unit that has had many calls about copy quality.
after being cleaned for dropping toner on ITB ass'y the print/copy jobs have background even in non-image areas.
previous work was restarting all developers and replacing the ITB. Everything has been thoroughly cleaned and i have changed the black charge corona ass'y. Regular bond paper has a faint look of background however the glossy stock they use shows significant background even if single color is used the background seems to contain a color mixture. Print volume is around 65K and current engine version is loaded.

any ideas would be greatly appreciated by me and the customer!

[jonezy999]

How do the charge rollers in the other(Y,M,C) units look?

[vwrome]

Sounds like the density sensor is dirty. Is the total clicks on the machine 65k??

[ddude]

If you have access to the tech bulletins, you will find volumes on this subject. No answers, just a lot written about this.........

[Ben Franklin]

Not a lot of prints on the unit so drums should be good. If you mean by restarting the developers, re-initializing the TD sensors, never do that. You will have to replace the developers and make sure you have a good set up result after initializing the TD sensors. First though, make sure your charge rollers are clean - use water only, laser shield glasses aren't fogged - clean if necessary, ID sensors are clean. Ricoh has a technical bulletin out on developer initialization because the process as outlined by he service manual is confusing. This TSB should be referenced if you are not familiar with the process.