bh600 cleaner build-up

[acsolutions]

Hello,
I have a bizhub 600 that about a month ago I had replaced the drum and blade. I got a call back for dumping toner two weeks later . removed the drum and blade and found build-up of toner, at first I thought the auger tube was not in place with the developer ( I did not check this when I removed the drum/cleaner unit) so I had check the drive to the cleaner and watched and made sure the toner was being augered to the developer unit and everything looked fine. On friday I got the same complaint that it was doing it again. I vacuumed out the unit again and watched, yes it was driving the toner just fine. I cannot see anything mechanically wrong, any suggestions?

[minimerlin]

Is the drive clutch on the back of the unit working ?

[acsolutions]

Yes, I think so when I interlock the front cover and run copies I can see the gears drive, and I lift the nozzle that goes to the developer I can see toner being dispensed to the developer unit. I guess the clutch drives the auger if so the clutch is operating.

[longshot0127]

If everything is working correctly it could possibly be the a grounding/bias issue between the drum or the the developer unit. you can use a paper clip to ground out the developer mag roller. Sometime if the unit is not getting a good ground due to poor contacts the unit will continually drop.

[acsolutions]

the dev. bias being bad will cause the cleaning unit to fill up? I guess the drum ground is the drum shaft, but won't that cause backgrounding ? machine has no copy quality issues until the cleaning area fills up!

[bizhub1]

When you replaced the drum and blade, did you also replace the toner guide roller inside the cleaner unit? and if so did the gear and bias pin get put back in place?

[longshot0127]

I was trying to find the document that I read about the paper clip trick but I haven't located it yet. If the image quality doesn't have a gray background I the developer mag roller was causing the issue. However, it did come a across the the information that made several other suggestions.

Toner spilling from cleaning unit. The toner recycling screw is not functioning due to a corrupted NVRAM

Toner density is high.
Check the developing magnet angle again and adjust it if necessary, Clean the toner recycle section, drum peripherals and paper feed path.

[acsolutions]

yes, the cleaning screw is operating,and the toner density is fine! no I didn't check or replace the toner guide roller but I wonder if It found it's way out of place. I think I'll replace that roller and clean the contacts to make sure everything is in place. Thanks Guy's for your feedback!

[KM_Service]

motor on back of IU drives the auger can fail causing the auger not to rotate consistently.
I've replaced this on a ouple of occasions and has solved the toner build up issue behind the c\bl

[acsolutions]

KM_Service, Do you mean the clutch or motor? If it's the clutch, I was thinking of replacing it. Possibly intermittent drive. what do you think? Thanks