Need Help for Scanning Quality problem

M

Markus

Hello everybody. I have a new (2 months old) HP PSC1100
scanner-printer, and I am facing a scanning problem. It appeared 1-2
days ago, and while before all was working perfectly. Any suggestions
would be greatly appreciated.

My problem is that when I scan photos, I can see yellow-orange
parallel lines accross the result photo. In some pictures it's more
obvious than in others, e.g. it's more celarly shown in photos with
lots of yellow and brown colors, while it's almost invisible in pics
with blue colors. Thing is though, that when I rotate the pic on the
scanner, trying to scan it from another angle, the lines appear on the
same place (as if there were stains on the glass-which is not the
case). Another info you might find useful: When I try to edit the
faulty pic on an image editor, when I split the pic into the 3
channels, RGB, the "Blue" color channel is the only one onto which the
lines appear.

Could it be a software problem, therefore I should re-install the HP
drivers?
Or perhaps a hardware?
Any comments, suggestions are welcome.
Thank you in advance.
Markus
 
D

degrub

What changed 1-2 days ago ? New software ? hardware ? something change
with power ? Otherwise, could be some dust/dirt on the mirror/lens,
could be having scan head autocalibration problems. Check the glass
area at the very beginning of the scan (usually under the leading edge
of the glass frame ) for dust etc and clean it with a soft brush. Don't
use canned air. If that doesn't clear it up, you can try turning the
unit on its side and triggering a scan. Sometimes the vibration from
scaning will knock dust off the mirror/lens assembly. Worst case, would
be that some of the CCD elements have failed and you should return the unit.
 
M

Markus

I have found the cause of the problem. It was due to what is called
"Electronic noise", and it got better when selecting a higher
resolution setting. I was using 200 dpi before, now it's ok when using
225-250. Anyway, thank you very much for the suggestions and advice.
Markus
 

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