Xerox DC 240 Little black spot (damege) on Black Drum!!!

[Onetouch]

I have a customer who has Xerox DC 240. The machine had little black spot on BK drum. I have changed 4 brand new Black drum now but I still keep geting those little black spot on drum after I copy about 200 to 300 copies. I can see those spot on my printed pages. Any idea how to stop getting my BK drum dameged.
Sounds weird but I hope it make sense to you guys.
Thank you.

[Dunu]

Re: Xerox DC 240 Little black spot (damege) on Black Drum!!!

XEROX DC 250 LITTLE BLACK SPOTS(DAMAGE) ON BLACK DRUM

[SeniorTch]

Re: Xerox DC 240 Little black spot (damege) on Black Drum!!!

Maybe the technisian refers to bias voltage from the internal power supply not the external source of power.
try replacing the bias power supply for the mag roll of developer K housing

[Jake2o]

Re: Xerox DC 240 Little black spot (damege) on Black Drum!!!

If the black drum keeps getting chipped then the problem lies with either the Developer and its housing, filtering it is more than likely useless, it needs to be changed completely.
Or there are airbourne particles that are chipping the drum.

[adriansto]

Re: Xerox DC 240 Little black spot (damege) on Black Drum!!!

XEROX DC 250 LITTLE BLACK SPOTS(DAMAGE) ON BLACK DRUM

First things to do:

- deep machine cleanning
- change all machine filters with new ones.
- change developer material at least black if not at all.

[Phil B.]

Re: Xerox DC 240 Little black spot (damege) on Black Drum!!!

can the spot be cleaned off? ( toner on rag..gently rub) or is the drum pitted?

do they print labels? on the cheaper labels the glue gets stuck on the drum giving those spots.

if it is damage look to the dev unit.. maybe an object has gotten in there an is marking the drum.