Bizhub pro 1051 dumping developer

[Charlieb]

I have a 1051 that has suddenly started dropping developer onto the transfer belt.
Developer was changed 12k ago aong with 750K pm kit. Machine has 2.75 million total.
Turning developer unit by hand doesnt cause dev to spill out.
When I run I/O mode 041 developer motor turns but not drum motor - when I run a print image looks like developer is worn out and has a band of developer 3 -4 inches wide approx 2 inches from the rear.
Developer is dumped at end of transfer belt.
Any help appreciated - Thanks in advance

[mick o connor]

what is the volume on the drum???? If drum and developer have been changed were the counts reset??
regards Mick

[nmfaxman]

Check erase lamps.
Residual drum charges will attract DV and toner.

Make sure machine is at least a little level.
I use a round bubble level on the glass.
If it is high in the front, all the DV settles in the back.

[Zackuth]

Have you found an answer for this issue? I have one doing the same thing.

[Charlieb]

A new developer assembly fixed the problem

[mick o connor]

Have you found an answer for this issue? I have one doing the same thing.

I have talked to other engineers working on 1200 and 1050 machines, one chap recommended I change the drum potential board ( the small board with the sensor looking down on the drum) part number
55VA-2081, and delighted to report fault fixed

[Zackuth]

I've changed the drum potential board, the developer unit, and charging unit. Tech support suggested to change the HV1 board, my tech rep suggested to reset to factory defaults. Haven't had an opportunity to try anything yet, but will keep you posted.

[mick o connor]

I've changed the drum potential board, the developer unit, and charging unit. Tech support suggested to change the HV1 board, my tech rep suggested to reset to factory defaults. Haven't had an opportunity to try anything yet, but will keep you posted.

I guess you have a tough one on your hands, good luck with it, I think I would be looking for the fire lighters at this stage

[Zackuth]

I think I would be looking for the fire lighters at this stage

No need to look, I have all that kind of stuff on my van!! :D

[Zackuth]

Our tech rep said I should perform the reset to factory default option in tech rep mode before I change anything else. After over 1000 prints everything looks good, and we couldn't get over 1000 before, so I'm thinking it's fixed. I have to replace the drum today, it's all scratched up from contact with the developer, and I'll let the customer use it.

[mick o connor]

Our tech rep said I should perform the reset to factory default option in tech rep mode before I change anything else. After over 1000 prints everything looks good, and we couldn't get over 1000 before, so I'm thinking it's fixed. I have to replace the drum today, it's all scratched up from contact with the developer, and I'll let the customer use it.

I'm sure you are glad to see that one sorted and no need for the fire lighters after all, thanks for sharing the pain and I will put that tip in my little book of fixes.

[dshiels]

Watch out for the bias spring contacts slipping out of position on the transfer belt assy, I have seen it cause pulling of developer onto pages.