Hi all, Maybe somebody can give me a hint: I have a Microtek Phantom 636cx (CIS-based) scanner which used to work wery well up to the day when the AC/DC adapter went away. I bought a new generic 12V/1.2A DC adapter but the scans now have slight rainbow stripes, depending on the resolution (or the speed of the scan head instead?).
The original AC/DC adapter was very light, I suspect it did not contain an iron core and wires around but was perhaps electronically converting the input voltage to 12 V DC (I am in no ways an expert in electronics, so I may be absolutely wrong). Also, there was an inscription on this adapter stating that it accepts a frequency of 47-63 Hz. As with the new adaptor everything works well but there is the aforementioned rainbow output (the scanned picture is well visible though, these rainbow stripes are rather lightly superposed to it), I think the scanner's electronics should be OK. The question: is it possible that the stripes are caused by voltage or current unevenness while scanning? Is a certain kind of current or voltage stabilisation needed for scanners, which can not be achieved by normal (domestic) DC adapters? Thanks for the response(s). Levente
