Mp 2851 background

[COPIERMAN]

i having a problem where you make one or two prints or copies and every thing is OK. if you make more then that. the image is there but background gets darker and darker. happens after about 2500 to 5000 copies. We have swap photo conductor /laser unit/ and i think tech also swap hv board but not sure. I have two copiers doing it now. One we were able to swap and took care of it that way. Has anybody seen this before. I think might be charge area causing problem but not sure. any suggestion would be appreciated.

[sandmanmac]

Re: Mp 2851 background

Genuine Toner / Dev.?
Sounds like a symptom of something generic?
Have you initialized the dev after PCU replacement?
I've personally never seen anything like that in this series going all the way back to AF220/270 thru MP3053, etc.

[slimslob]

Re: Mp 2851 background

My only thoughts would be a grounding problem, either drum shaft or development unit. Might also be a continuity problem to the charge roller or even the HVPS.

[copyaction]

Re: Mp 2851 background

Did you try the transfer roller?

[andy227]

Re: Mp 2851 background

Sample copies for us to see would be helpful ?

[Mark Bbb]

Re: Mp 2851 background

Do you use original Ricoh products?
You need to replace all the drum parts (not only develop, drum and blade) at the same time.

[davel]

Re: Mp 2851 background

Old machine could be any number of issues, I would start with 1027 PCU and a transfer roller

[COPIERMAN]

Re: Mp 2851 background

thanks for the suggestions The products that we use been using for over 5 plus years and in many of the mp2550/2851/3352 etc. rest of copiers are fine and not having this issue. Sounds like some type of connection problem will take from what i read and try see what fixes problem. thanks again for information.

[Oze]

Re: Mp 2851 background

thanks for the suggestions The products that we use been using for over 5 plus years and in many of the mp2550/2851/3352 etc. rest of copiers are fine and not having this issue. Sounds like some type of connection problem will take from what i read and try see what fixes problem. thanks again for information.

I agree with Davel and would be trying a 1027 complete pcu to rule out any issues with the existing pcu.

[Mark Bbb]

Re: Mp 2851 background

thanks for the suggestions The products that we use been using for over 5 plus years and in many of the mp2550/2851/3352 etc. rest of copiers are fine and not having this issue. Sounds like some type of connection problem will take from what i read and try see what fixes problem. thanks again for information.

Is that an answer on my question? It is not enough info, sorry.

[slimslob]

Re: Mp 2851 background

Is that an answer on my question? It is not enough info, sorry.

It is a completely valid answer. He has been using the same line of supplies for over 5 years with no problems. the name of that line is none of your business. There is at least one line other than Ricoh who sells products that are as good or even better than Ricoh. Of course they are also nearly expensive.

[Mark Bbb]

Re: Mp 2851 background

It is a completely valid answer. He has been using the same line of supplies for over 5 years with no problems. the name of that line is none of your business. There is at least one line other than Ricoh who sells products that are as good or even better than Ricoh. Of course they are also nearly expensive.

I don't agree. But i rest my case.