Michael wrote: > On Friday, 30 December 2022 02:28:32 GMT Dale wrote: >> Howdy all, >> >> I have a HP scanjet 4570c flatbed scanner. I bought it used years ago >> and most of the time, it works just fine. On occasion tho, I get >> something weird. When I scan something, it adds some pinkish colored >> streaks. I took a scrap sheet of paper and scanned the back of it. I >> used a magic marker on some text that was there, also drew a smiley face >> on it as well. Anyway, the side with print is on the opposite side. >> Basically, it is also seeing the back side of the paper. I'm not sure >> if that could cause this weird streaking but wanted to mention it. > I've come across the pink hue artefact on an old HP scanner, but can't recall > the model. It is not related to the print of the opposite side becoming > visible, which is caused by a high light exposure setting. You need to > reduce > the exposure to a level where you can see the primary print clear enough, > without the back side bleeding through. >
I kinda figure that. It is pretty bright. I don't recall seeing a setting for it but I may not have seen it. I mostly tried different color settings, resolution and such. Goes to show tho, it is sensitive. ;-) >> At first, I thought it was something on the glass so I disassembled the >> thing and cleaned it as best as I could. When I put it back together, I >> concentrated on the back side of the glass, since I have to disassemble >> it to clean it. I also clean the side the document goes on regularly. >> If it changed, I can't tell it. Another odd thing, the streaks change >> depending on the document. Sometimes you can barely see it, other times >> it is awful. I've not been able to reason out what makes the difference >> tho. > Cleaning the glass won't affect the pink hue. I dismantled the scanner and > cleaned the glass too, with no improvement. > > >> I've got about the same results using Scanlite, Scanpage and XSane >> software. XSane may be a tiny bit better but it does vary at times. >> There's not a lot of settings available. I tend to use either 100dpi or >> 300 dpi for resolution thingy. I fiddled around a bit but it doesn't >> seem to help. This is a link to the page I described above. It's a >> little sizey so I didn't want to attach, for those who have email >> clients that puke a lot. lol >> >> https://freeimage.host/i/HTQLpWb >> >> You may notice that it is a little heavier at the top and gets lighter >> as it goes down. I've checked the glass, I can't find anything that >> would cause this. Is my scanner just going bad? Am I doing something >> wrong with a setting or something? Any ideas? Thoughts? > The pink hue is probably due to the scanner bar going bad. Some fixes, which > did not work in my case, are as follows: > > 1. Reset internal chipset: Plug it in, switch it on, then pull the power > lead, followed by the USB. Wait for a minute or longer to discharge, then > reconnect, power on and try to see if the problem is fixed. > > 2. Overheating: More of a problem in the summer. Use a desk fan while > operating to see if it makes a difference. > > If none of the above work, then the scanner bar needs replacing. Probably > time for a new scanner, unless you can find a donor scanner for the scanner > bar. Well, bummer. I was afraid it was going bad. I knew it moved the light thing back and forth and all but know there is a lot more to it than that. If it was a consistent streak, I'd think a bad CCD or whatever that chip that grabs the image is called nowadays. This tho, wasn't looking like that. I may disassemble it again and check all the cables. Disconnect and reconnect everything and hope for a bad or lose connection. Now let us pray. Given I only use Linux, know of any good and commonly available flatbed scanner models? I'm fine with used ones as long as they work. I like the one I got since when I'm done, it stands upright in my closet and takes up very little floor space. It does a really good job. I've even scanned in pictures and they looked good, when it wasn't doing the streak thing. Thanks. Dale :-) :-)
signature.asc
Description: OpenPGP digital signature
