Ricoh mp2001,blank copies with black mark in middle.

[DAG COPIERS & COMPUTERS]

Dear Ricoh gurus, thank you in advance for suggesting solutions to this problem.
It is Ricoh mp2001, has done 143,370 copies, then started producing blank with only some dark line in middle of page. We changed drum cylinder, blade and developer still problem persists. Any ideas?

[slimslob]

I would check the laser assembly and the IPU. When you changed the developer did you check the gears on the development shaft and mixer shafts? Also could be the IPU.

[Gift]

Are the DV drive and DV box gears OK?

[DAG COPIERS & COMPUTERS]

Thanks guys, Will crosscheck and get back intouch.

[Bantams]

what dev did you fit as its not the same as the mp2000 dev...