docucolor 242 drum streaks - any tips to rejuvenate / clean ?

[Island]

I'm a customer and I've only had my machine for two months now, so be gentle

Yellow customer replaceable drum unit has two solid yellow streaks - very thin lines that print solid yellow in all color areas. Changing yellow and magenta drum, lines follow the one drum unit. Machine reports 49% life remaining; I have printed 15,000 11x17 and 12x18 color prints and about 43,000 total prints with this drum in the docucolor. Are there any tips for cleaning / rejuvenating this drum unit before sending it back to xerox for recycling/rebuild?

[kalindd]

It is possible to clean the BCR charge roller with soap and water then dry it with dry soft cloth, but the drum unit needs to be disassembled . VERY carefully. And if you are not trained service technician you can damage it really easy. But usually BCR is damaged and there is nothing you can do.

[Island]

Thanks very much Kalindd -- if disassembly is required I'll send it in since I'm sure they're setup to rebuild them quicker than I could take it apart and clean it here. Just wanted to be sure there weren't any 2-second procedures/tricks to try before wasting their time with a premature change.

One other question: what's the difference between the blue drums (which shipped with the machine) and the green drums? The reason I ask is because I just installed a brand new xerox drum (11/28/08 for 242, 252, etc. stamped on the brown box) that has a green coating and after doing the color cal calibration twice (to be sure it wasn't me) the gradiation between 0% and 100% isn't quite as smooth as the blue coated drum which was installed in the machine as delivered. It's ok, but not quite as even.

[Island]

Or is there any other step that should be performed to calibrate the machine when changing a customer replaceable drum unit?

[kalindd]

Or is there any other step that should be performed to calibrate the machine when changing a customer replaceable drum unit?

No, there is no any other adjustment needed.
The difference is: blue-made in China, green-made in Mexico, as far as I know.