[CQ] MP5000 over toning.

[aarifabbas]

I am facing a problem of over toning in MP 5000.i have recently replaced drum cl.blade ch.roller.
after taking 25 black copies it gets better.but again over tones. checked TD sensor and ID sensor,both are working fine.
has any body faced this kind of problem.

[Gift]

Re: MP5000 over toning.

No usually this machine tends to produce light copies even if it looks different dirt-wise inside the engine

You can try and remove the hopper, run black copies and initialize the td/id sensor again.

Toner/drum should be OEM to avoid bad surprises. And take care everything is clean including the mag roller of the dev unit.

[slimslob]

Re: MP5000 over toning.

This is a very common problem with the 35/45 and 40/50 ppm models. The development roller becomes coated with toner and will cause either light copies or what appear to be over toned copies. First thing to try is to clean the surface of the development roller. If you have been using after market toner or older Ricoh toner, Ricoh had to change toner because of this a number of years ago, you will need to dump the developer and complete clean all toner from the system. Worst case scenario is that you will have to replace the development unit, Ricoh used to make just the development roller available but not anymore. If you have to replace the development unit, keep the old one. It will come in handy if you ever have paddle shaft bind and cause stall the development motor but still has a good development roller.

[andy227]

Re: MP5000 over toning.

Agree with above that this machine normally suffers from very feint copies, however, I have found to my horror that should you find feint copies on this, and you do a 'forced toner recovery' on this machine, it carries on adding, and adding, and adding toner, until you get an overtoned mess. You haven't done a toner recovery have you ? If I do a forced toner on this now, I count about 5 seconds then switch off the machine. Its normally about right then.

[apump]

Re: MP5000 over toning.

when you rebuild the pcu clean inside the bushings that the charge roller goes in. they get toner inside them and it will cause this issue. I've had to take the roller back out just to clean this a couple of times. now I make sure I do this every time. actually did one today

[jonhiker]

Re: MP5000 over toning.

when you rebuild the pcu clean inside the bushings that the charge roller goes in. they get toner inside them and it will cause this issue. I've had to take the roller back out just to clean this a couple of times. now I make sure I do this every time. actually did one today

just started doing this, only takes a couple of minutes and helps out.

also, change dv and scrub the mag roller if this issue shows up. force toner add will just make it worse...

[aarifabbas]

Re: MP5000 over toning.

I have changed the developer ,cleaned the development,unit and drum unit,transfer belt and transfer unit,laser unit.and the complete the machine frame.Replaced the development unit,ID sensor,toner hopper,new toner bottle,IO Board.checked development unit connector which is good.but still add toner is displayed.once I remove the bottle and put it back,machine adds the toner and gets over toned. Vref drops to 2.35.

I have updated the engine and system firmware.

[jfbar1]

Re: MP5000 over toning.

This is a very common problem with the 35/45 and 40/50 ppm models. The development roller becomes coated with toner and will cause either light copies or what appear to be over toned copies. First thing to try is to clean the surface of the development roller. If you have been using after market toner or older Ricoh toner, Ricoh had to change toner because of this a number of years ago, you will need to dump the developer and complete clean all toner from the system. Worst case scenario is that you will have to replace the development unit, Ricoh used to make just the development roller available but not anymore. If you have to replace the development unit, keep the old one. It will come in handy if you ever have paddle shaft bind and cause stall the development motor but still has a good development roller.

+++ on this. Also, NEVER do a "forced toner" on this series of machines.

I used a wadded up piece of paper to clean the mag rollers. I found that once the toner/developer ratio gets out of whack, it never recovers.

You will need to always have some b2969640 developer handy.

The drums on these are rated at 160k. Once you see wear on the edges, plan on replacing it as well.

[Chrief]

Re: MP5000 over toning.

I had an issue regarding the same, was told by Ricoh that there was a batch of toner (4500E/S) faulty.
Solved the problem by replacing developer and fitting latest batch of toners
Try looking up the EDP code of the toner with the current code. (P#: B296 9901)

[andy227]

Re: MP5000 over toning.

+++ on this. Also, NEVER do a "forced toner" on this series of machines.

jfbar1, as I said above, do it for about five seconds and switch off machine. Just don't let it run its full cycle.

[JonManchester]

Re: MP5000 over toning.

Here's a cheat sheet.

[tonerhead]

Re: MP5000 over toning.

Here's a cheat sheet.

I totally agree with your cheatsheet and would like to add one additional step which I feel is very important. Before removing the blocking sheet, make sure you take a vacuum and suck out any toner above it that might fall into developer mix.

[slimslob]

Re: MP5000 over toning.

Here's a cheat sheet.

Step 9. If I have replaced the developer, I cut a piece of the developer bag. It pulls our easier when time to remove.

[Debs1964]

Re: MP5000 over toning.

For constant overtoning on these machines check the rear lever on the transport belt unit, this should be pointing down, it cams the belt away from the drum when not in use, if this lever is in the up position then the belt never moves away from the drum, when there is a patch on the drum the transfer belt wipes it from the surface of the drum before it gets to the ID sensor, so the machine detects that it is undertoned and forces more toner

[llyyhh]

Re: MP5000 over toning.

The step 10 in cheatsheet 'detone the DV',is it necessary?