Ricoh Aficio MP 2000 - toner bottle rotates continuously

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Paul@justmanuals.com

[withnail]

I've had this problem with ricoh toner and low life parts, I found the NVRAM wasn't holding VSP/VSG values, they were 0v & 5v so the bottle just keeps turning. I replaced the bicu and id sensor and the fault returned, after replacing the Bicu NVRAM the fault went away.

[steele]

Can we back up to the beginning?
When did this all come about? Was the machine up and running fine, and then started doing this out of the blue? Or Did it require a service for other reasons, and then started giving you trouble afterward? (and you say all parts are OEM. Does that included toner?)

The machine worked for a year fine.

Now this is the back of the print:

imgur: the simple image sharer


I took the drum unit and toner from another machine. Dozens of copies was fine and the problem has returned.
I put a new drum unit and a new toner and again the same thing.
The cover is removed so I can see how every time a bottle is spinning.

imgur: the simple image sharer


I'll try to replace NVRAM.

[Bantams]

I would replace the I/O pcb first they used to blow a chip stoping the bottle from turning on the old adam machine.

If you have another machine you can use for parts swap the IO and the toner bottle motor as a pair.

[lazymangr]

i am ressurecting this thread from the dead cause i got the same problem with a customer. i am toshiba oki konica certified but not ricoh so i dont got too much experience with ricoh's mumbo jumbo. same printing in front and back, changed whole image unit had the same efects. then replaced on the new psu the developer run fine for some hundreds then the same. looking at the drum i see dev-toner on it. when i turn it manualy out of the dev unit it cleans. if i put on the machine i see dev-toner on the drum all time. any help?

[gellyman]

the ID sensor by the transfer roller maybe out of position. sitting farther away from the drum. at a glance it looks like it is seated properly, but i have had those pushed down or away from the drum which will cause overtoning.

[lazymangr]

prolly a faulty imaging unit. re-replaced with a new and all is good.

[tonerhead]

You might burn up a developer or two troubleshooting. But you could try this. Set SP2921 to fixed mode "3" with fresh developer, this makes the machine add toner by pixel count and takes the toner sensor out of the picture. If it seems to work fine, then you have a bad toner sensor. If it still overtones, then it might be the ID sensor by the transfer roller or circuit board as was mentioned. BTW. When you are finished doing a developer change and pcu rebuild you are 1. turning on machine with doors open. 2. Entering service mode. 3. Closing doors 4. executing sp 2214 (toner sensor initialize). You probably are, but if you are not, that may be the issue.