Question about HP Scanjet 4570cxi Flatbed Scanner

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No Show! Screen is black when the document is scanned. I cannot tell what I have just scanned. When I set on the color setting, I can see it a little bit - but it is still real dark.

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Two things you can easily check:

Ensure the issue is not caused by Electro Magnetic Interference (EMI) EMI can cause similar image quality issues. Verify that the scanner is not in the direct vicinity of the computer monitor and/or speakers. If so, relocate the scanner at least three feet away from the monitor and/or speakers and retry the scan.

Also, try this as well:
Re-home the scanning carriage The scanning carriage in the scanner may have lost the home position and needs to be reset.

  1. Shut the computer system off and then disconnect the scanner from the power source. Leave the scanner disconnected from the power source for at least one full minute.
  2. Reconnect the power and then restart the computer system.
  3. When the computer system has fully restarted, try scanning again.
Oh.. and you ARE using the power supply that came w/ the scanner aren't you?? If not, you NEED to.

Maggie B

Posted on Feb 21, 2008

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Vertical Black Line


Probably there is nothing wrong with that scanner, just open and clean document feder with alcohol or glass cleaner.

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When I save a scanned document you increase the file size. Please. Thanks.


Document size can be set before you scan.
Your scanner software should give you options for type of document and resolution settings. If your documents are to large, set resolution lower.
Example, Black and white or greyscale scans are much smaller in size than color documents.
Saving files as jpg will compress the file for storage.
If you have an image editing program you can decrease the size of the file after the scan.

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I need to scan single page documents at 70kb on my HP 5500 all in one. I have tried changing all the settings that I can find and all my documents scan at about 200kb in pdf format.


Resolution and color depth are the 2 main factors that determine the size.
Scan in black & white, and reduce the resolution to 150 dpi, that should give you very small PDFs.

I scan text pages at 30kb with my HP 5610 in PDF.

Jun 05, 2009 | HP Scanners

1 Answer

Bad contrast with scanner


Last things first: NO USER SERVICEABLE PARTS INSIDE.

That's the way HP does things. There are no rheostats or pots to adjust. It's all done electronically now, with chips and things.

You never said how it does with color or greyscale photos or drawings.

As for the RGB=(64,64,64), that's about right for the scan picture settings and the mixed (text and graphics) setting, and is particularly true for color picture settings. Have you tried using the setting for drawings (or line art), specifically greyscale drawings? Usually the greyscale lineart or drawing setting will render black text. You might also try scanning with the settings set for Text. If the greyscale drawing settings or greyscale text settings do not produce black text, try reinstalling your software and drivers.

If the contrast stays the same for all settings after reinstalling the software and drivers, and if it doesn't scan color and greyscale pictures correctly, then it sounds like your scanner is going bad.

As for the scans you've already done, you can darken the text by taking it into a photo editor, such as Paint Shop Pro or Photo Shop, and adjust the contrast and brightness to get the effect you desire.

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Faulty scanned images


Pls check your color Scan settings. Generally there will be some color difference between the original and scanned Image because, the original is 'reflected light' whereas, the scanned image is a 'source light' on the monitor. The monitor setting can also affect the color output. S. Mohan

Jan 28, 2009 | HP ScanJet 2400 Flatbed Scanner

1 Answer

Document Recognition


Hi!

Here is an OCR software which you can download for free.

Please click on the link to access free OCR (scan to text) software.

Thanks.

Jan 06, 2009 | Epson 2580 Perfection Photo Scanner

1 Answer

Scanned image only prints in black and white


it's tricky / annoying:

you have a preview ...
you have some of the (3) images checked
but also you have some of these images selected (blue outline)

now:
when you select (I don't mean the checking) an image you'll have to set the scanning params
again - or check them ...

if you select an image, and then set the params (like "color"), your scanned image will be in color

....
also resolution is the same way ..
especially after crating preview .. it'll be set to 300 Dpi
so after seecting one for scanning - check the resolution too :)

jepe

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1 Answer

Blank Scan from HP Scanjet 5590 Flatbed Auto Feed


Scanning is possible in 'Text' mode and 'Picture' Mode. In text mode, which is simple 'Black & White", this can happen, particulalrly if the text is in color. Either you increase the contrast settings or scan the document in Grey/color and convert it to B&W using the software. By this you need not check if there is output!. ( I am assuming that otherwise the scanner is performing okay). File size in B&W is very small as compared to Grey/color.

S. Mohan

Apr 04, 2008 | HP Scanjet 5590 Flatbed Scanner

1 Answer

After i scan a document, the image appear in black screen. Why?


uninstall the software from pc and turn off. then restart and re-install software.

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