RE: filmscanners: My replacement 8000 is banding like the first one :-(

[Jawed Ashraf]

> >         Does the scanner seem to stop and start or is it a smooth scan?
>
>       This is completely out of left field, but could it be a power supply
> (in the scanner) issue? Someone else commented on how this only seems to
> show up with scanners using stepper motors... Could the stepper motors
> cause spikes in the PSU that could interfere with the imaging side of
> things? Either sending noise to the CCD, or even pulsing the light
> source are a couple of possible ramifications... Just a wild guess...
>
> Isaac
>

This is a good/interesting theory.  The voltages coming out of the CCD are
tiny.  In high end CD players (multi-thousand dollars) ultra-quiet power
supplies are a key component of the design.

Jawed