Design of a 600-Pixel-per-Inch, 30-Bit Color Scanner (1997) [pdf] (hpl.hp.com) 3 points by cricalix 3y ago ↗ HN
[–] cricalix 3y ago ↗ Found this while watching someone on Twitch refurbish/repair a HP 4c scanner. Goes into some detail about the light source, light path, capture CCD, and RF problems.
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