MP4500/MP4000 Ongoing Copy Quality Issues

[nmfaxman]

I have been adjusting the doctor blade gap to a tight .35mm.
I figured it was too high of a brush causing the toner to be pressed into the mag roller.
So far all my machines have reduced in calls for this problem.
I have even found the gap to be .45 on the front and .40 in the rear on brand new machines.
I check the gap everytime I replace the developer.

[techspec]

Ricoh have modified the Dev unit, part number D0092301, I have fitted a few of these and so far so good
The mod bulletin number for this is MD009017

[Shadow1]

I spent the last few days at Ricoh Tech school - the instructors get a lot of inside info...

There is a new formula toner and developer supposed to be released shortly. This is what we have been telling them the problem was from the start!

In the mean time, several techs have been running the B079 developer and toner and getting the machines to run a full PM cycle. You have to "hack" the toner hopper, toner motor, change fuser temp, and make sure the customer gets the "right" toner and it triples your service intervals.

[Kopyrtek]

Well dont feel like you are alone in this.We have been having problems since we put these out too.Although tech bulletins on this have helped some, not all will.Lightly cleaning the mag roller with a scoth brite has helped with the build up and overtoning but there is still no sure fire way to resolve this as yet.
Replacing drum and developer is costly and still no word on a permanant fix from Ricoh.

[Caveman]

I have a large population of MP4500 and MP4000 units that I service. These units are proving to be extremely difficult to regulate with regard to overtoniing and ongoing copy quality problems that show as dirty background and banding. In most cases the drum and developer fail far short of the expected yield. I have been working diligently to find a lasting solution to these problems. Lately I have been concentrating primarily on the mag. roller assy - in most cases I find that the surface is heavily coated with a very dense toner residue. If there are any suggestions as to what can be done to help get these particular models to run more consistently regarding overall copy quality please advise.

I would like to thank everyone in advance for your input and assistance.

Caveman