Bizhub 250/350 eating drums

[fixthecopier]

I just became aware of this problem as I was leaving the shop. The service manager has a 250 and a 350 with same problem, machines are in different locations. The 250 has 260,000 copies. The drum and developer were changed at 200,000. It lasted 42,000. Changed it and it lasted 7,000. Changed it and it lasted 7000. Dave says it is sucking developer to make copies and killing the drum. Drum charge, hv parts, and all the usual have been changed. Has anyone seen this?

[pierre]

hi there,

When you replace the drum unit,You must replace the developing unit too

[fixthecopier]

No, not on the bizhub. You change the drum and put new developer in the dv box. But anyway the whole unit was changed last tlme.

[Rudi]

I am sitting with the same problem and you are right i think the dev unit should only be replaced every 400k copies.This was never a problem on the di 2510.

[nmfaxman]

There are mylars on the dv unit that tend to warp and scratch the drum.
Trim the mylars or replace dv unit.

[ni311]

You don't have to change the dv unit, unless the mylars are broken, you're right. I usually also check the two rolls on both sides of the developing roller. At around 100k, I'm changing it. There isn't a fixed number to change these parts, depends on many factors.
Did you change the transfer roller assy?

[redhotrob]

Have you replaced the transfer roller?

[fixthecopier]

Sorry about being slack about your question. Yes the transfer was changed, and made no differance. I will get some more info today and update.

[fixthecopier]

OK, here is the fix. The DV collars are getting contaminated when the new developer is put in[ being sloppy ]. When you change the developer, be very tidy and clean up. So one of the eariler post was correct that changing the dv box should cure the problem. As this is an ongoing problem we are trying to get a part number for the collars so we can fix it ourselves. I will update.

[artfer]

The DI-1611 / DI-2011 DV Collars are the same as this one and have part number on the parts manual.