Colors cross-talk: anything can be done about it?

Hello!

It seems my scanner (HP Scanjet 4C) has a noticeable colors cross-talk.
It mostly appears when scanning underwater images with turquoise background
of the shallow water shot at upward angle: instead of the colorful turquoise
the background is closer to gray. Playing artificially with various
RGB values I see that the turquoise color should consist of close values of
blue and green and no red, while inspecting the scanned bitmap shows that
there is a significant red component (Red=0x33, Green=0x96, Blue=0xab).

I would like to know if there is anything to do about it, apart from
buying a new scanner? Any software algoritms for correcting it?
Can it be as simple as cleaning some internal part (I don't mind
disassembling the scanner)?

Can anyone explain the principal of this phenomenon and what parts
of the scanner it originates from? Is it inherently in the CCD sensor
(I'm assuming that's the sensor type) or can it stem from the internal
mirrors or from the timing mismatch between the actual position of the
mechanical parts and the position perceived by the stepper motor controller?

THANKS IN ADVANCE FOR ANY HELP ! ! !
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* Arie Kazachin, Israel, e-mail: (E-Mail Removed) *
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