streaky printing?

[Dwight Elvey]

>From: "Philip Pemberton" <philpem at dsl.pipex.com>
>
>In message <200601200513.AAA06586 at Sparkle.Rodents.Montreal.QC.CA>
>          der Mouse <mouse at rodents.montreal.qc.ca> wrote:
>
>> Letting the printer sit will improve matters somewhat, but only
>> somewhat; recently, I've even had the first page come out with some
>> streakiness.
>
>I'd guess it could be the erase lamps for the photoconductor drum. If they're
>not working properly (or firing then going out) then you might end up with
>this fault. I'd defeat the interlocks and cartridge sensors, then cover the
>laser aperture and see if the erase lamp comes on before the paper starts
>feeding. IIRC the procedure is in the service manual.
>
>Failing that, it could be a dirty transfer wire, or maybe a dirty (or worn)
>drum cleaning wiper.
>

Hi
 I had a similar problem that was buildup of toner on the drum.
It would not completely erase. I tried just about everything and
then finally changed the tone/drum unit. This fixed it. It seems
that the drums get old just sitting. Like his, it would print
the first sheet OK and then get worse as I printed more.
 I'd suspect that one could bake the drum and it would work
better again. My guess is that it is moisture getting into
the drum surface. The 3si uses the organic drum.
 Still, he should do a general cleanup of things.
Dwight