Question about Epson Perfection V350 Flatbed Scanner

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Vertical banding (rainbow effect)

I am having exactly the same problem everytime I try to scan something that is printed on reflective or foil stock. Vertical "rainbow" colored lines. Have tried myriad settings for hours now. Cleaned the glass thoroughly. Have only had the scanner for 2 days, and am already thinking of returning. Is this a common problem with Epson scanners, or LED lightsource scanners in general?

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You need to scan the prints at the same resolution that they were printed. Otherwise you'll get that screen door effect (moire pattern). I think this effects most scanners. I'm currently looking for a photoshop solution to this problem since I don't have the originals. Not fun.

Posted on Jan 06, 2011

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HP6500 won't print on foil


Most inkjet printers need a paper that has an absorbtion rate of +.ooo5 but unless the foil is a coated stock I dont think the ink will adhear to it..Try a differnt stock . Maybe a bad batch of labels..and did you use HP printer ink or are your cartrages refills??

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Why does my Epson Stylus NX300 print a rainbow color band at the bottom of vertical 4x6 pictures


DOES THIS COLOR SHOW UP ON YOUR PRINT PREVIEW?

IF NOT, THAN GO INTO PRINT CARTRIDGES ON YOUR COMPUTER AND CLEAN THEM UP!

THAN DO A TEST ON A SEPERATE PIECE OF PAPER THE SAME PICTURE TO MAKE SURE IT HAS STOPPED WITH THE RAINBOW PROBLEM YOU'RE HAVING.

YOU MAY ALSO HAVE PICTURE SETTINGS WRONG ON YOUR COMPUTER, YOU CAN CHECK THESE UNDER PRINT PREFERENCES.

IF NON OF THE ABOVE WORK, THAN TAKE YOUR PRINT CARTRIDGES OUT AND CLEAN THE CONTACTS WITH SOME RUBBING ALCOHOL AND A Q-TIP.

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Canoscan 4400f delivers different colour vertical stripes low saturated but enough to make scan unusable. Have cleaned mirrors to no effect, cannot access the lens for cleaning, seems hidden in body of...


if u are scanning from a document feeder then its a spec on the glass as the paper passes over this spec the scanner reads as though the spec contiues all the way down the page
if it occurs from the flatbed scan i would suggest its dirty fuser or transfer roller

u can try a stop test by scanning a document and asking for 10 prints stop it after 2 prints and open the machine and remove the papers that are halfway through the machine this can help u narrow down exactly where the print defect starts from

Jan 19, 2011 | Office Equipment & Supplies

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I've been having problems with my Epson 7600 large format printer, I recently took it all apart to unblock the light black tube. I reassembled the printer and everything is back to normal apart from I now...


The most common cause of horizontal banding is generally missing, deflected or clogged nozzles. To see if this is the cause you should first print a nozzle check and examine the printout with a 10x or better eye loupe for any missing or deflected nozzles. If nozzles are missing or deflected you will need to perform cleaning cycles to recover these nozzles. Once all missing nozzles are recovered try printing your document again.
If no nozzles are missing or deflected, check that you are using the correct driver settings for the type of media you're printing on. Also try printing at a higher resolution and turning high-speed (bi-directional) printing off.

The most common cause of vertical banding is over-saturation of the media, usually created by paper "rippling". To correct this effect, decrease the saturation and lower the paper suction. If vertical banding is still apparent print the image with high speed off (uni-directional). If this corrects the issue, align the print head, as described on page 5-6 of the Users Guide.

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2 Answers

SERVICE REQUIRED E 511


The 511 error relates to the PCU rotation sensor. There are several causes and solutions.
Causes 1. Toner build up on PCU foil square 2. Toner powder build up on sensor 3. Misalignment of PCU band 4. Damaged PCU foil square.
Solutions 1. Toner build up on PCU foil square Remove PCU from printer and carefully rotate the PCU band around until you see a silver foil square. Remove any excess toner from foil square. Inspect condition of foil square, if damaged go to solution 4. Reinsert PCU and test.
note: PCU band is best described as a black rubber-band type looking material that rotates around the PCU. Be careful not to touch it with fingers or expose to bright light as this can damage it. Clean foil with simple tissue cloth or similar.
2. Toner powder build up on sensor. Remove PCU unit and using a vacuum and/or can of compressed air spray/**** off excess toner powder from sensor inside of printer. The powder can block the sensors ability to sense the foil square, giving you the error.
Note: Sensor is hard to find, but looking at the foil square on PCU band you should be able to judge by line of sight the approximate location, you are looking for a box with a small tab wire with 2 wires coming out from it. Spray / vacuum in that area. Make sure printer is unplugged be careful not to create a excess of static electricity with the vacuum.
3. Misalignment of PCU band If your PCU band has moved off to the right or left of the roller, it will need to be realigned. A simple check of the right and left position on the roller will determine if you need to realign. To realign take apart PCU and carefully manipulate into correct position.
Note: Wear gloves and expect this to be messy with toner. Try not handle PCU band excessively as once it is damaged print quality will be ruined and PCU will need to be replaced.
4. Damaged PCU foil square. If the square is damaged, replace with a piece of tin foil. Superglue on carefully.
note: You don't need to put the new square in exactly the same place, just above or below on the belt is fine.

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Epson V300 Photo Scanner Streak When Scanning Negative


I also own a v300, and I have noticed that I occasionally get rainbow streaks if I bump the scanner at all while it is scanning negatives, so this might have something to do with vibrations in the machine. Is it sitting on a stable surface?

Mar 14, 2009 | Epson Perfection V700 PHOTO Flatbed...

1 Answer

When printed from a scanned image vertical bands appear


Well, now, jannyloubran,
I hope that I understand your question: are you saying that there are vertical bands when an image is scanned, and then printed? In other words, if you download, say, a picture from your digital camera and print it, no bands: but, if you scan a photograph, then print the scanned image, you get the bands?
Going on that assumption, I would guess one of two things is happening, and possibly both:
  1. The resolution (usually "dpi" in America) is set too low on your scanner to get a very good scan, and so the print is poor. To scan a picture, you really should set the resolution as high as your equipment will allow and your hard drive has space for (the higher the resolution, the more space the file created from the scan takes). Without getting too technical and getting into optical vs. interpolated resolutions, 1200 x 1200 is usually an adequate starting point that will give a decent image (hopefully sans bands) without taking up gigabytes of storage space per scanned photo. You need to open the scanning software that came with your printer and set the resolution higher. If you can't figure out how to do that, open the help file that came with it or go to http://www.usa.canon.com/consumer/controller?act=ModelInfoAct&tabact=SupportDetailTabAct&fcategoryid=238&modelid=13800. From here, you can search their FAQ, ask a question from their knowledge base, send tech support an email, or get a phone number for support.
  2. If your scanner is an older one (you didn't specify), then it may be either worn out (unlikely) or simply not able to support a high-enough resolution for the quality we have come to expect.
Now, if it turns out that I have been having a bad dream and none of the above applies, please repost with more information as to exactly what you have to do to replicate the problem, including what, exactly, you mean by "bands" (black and white bands, bands of fuzzy focus, bands of off colors, wide bands, narrow bands, bands all the way from top to bottom or just halfway, or what?). Also, have you changed anything else between printing from the computer and trying to print the scanned image, such as new cartridges or aligning or cleaning the printhead? I know it's a pain to spell it all out, but sometimes that's the only way we geeks can figure out how to help—and, I hope this helps!
Ken


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1 Answer

Brother MFC7820N


I assumed you are using a digital copier/printer, in digital machine there were 2 kinds of diagnosing a problem, and you are right with your observation Copying and Printing, and each have two separate troubleshooting.

If you say that in printing is fine, then the problem is with the scanning part which is in your Optical Unit, here's some pointers

1- Open the optical glass on the top, with screws

2- Observed the optical unit with 3 reflective glass, it could be dirty
3- the middle of the optical system is called the CCD which converts the image from the reflective mirrors, see if you can find dust and dirt.
4- Check the lamp for any sign of dirt this could cause also some problems.

these are the only areas you need to check, nothing else, and this would surely solve this problem

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1 Answer

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You probably need to change out the semiconductors. The parts are STK392-110. There are two of them, one for horizontal and one for vertical. Search it online more.

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