Question about Microtek SCANMAKER 4850 Flatbed Scanner

8 Answers

Glass Dirty on the Inside

While the scanner may be factory sealed, there has accumulated over time, dust, debris, or something on the inside of the glass. The scans used to be beautiful. Now there are so many dust partials on the inside of the glass that a decent scan is not possible. I don't have the hours needed to clean it up in Photoshop. Just because it is factory sealed, it does not mean that very fine dust cannot get in. If that were the case, one would have to surmise the dust was sealed in at the factory. That probably is not the case. So, how do you clean the inside of the glass?

Posted by mrsdog on

  • 8 more comments 
  • EJscan Nov 04, 2007

    I have the same problem, the glass is fogged on the inside.

    I guess is should bust it open, but it is such a good scanner.

  • jamaican_rum Nov 06, 2007

    Yes, same problem and I'd really like the answer as the inside of the glass is getting more and more 'fogged' up. Thanks in advance.

  • retiredbri Nov 26, 2007

    I have one about 2 years old with dust on the inside. It will cost UK£ 60 to have it cleaned but this Canon UK official service & repair agent does not have clean room facilities so cannot guarantee a complete fix.

    I've tried to get the case open but even having removed the screws, the two halves of the case are kept together by plastic lock tabs.

    Does anyone know how to get the case apart.?

  • vnaidu Feb 14, 2008

    I get to see on coloured streaks on preview. the actual image is not visible instead only green, yellow red & blue streaks are visible on the preview pane. Also there light fogginess in the innerside of the glass.

  • Anonymous Jun 18, 2008

    The dust on the inside makes it impossible to get a clean scan. I'm not sure how to take it apart to clean the glass from the inside... and I'm sure my warranty has been expired (the dust has accumulated over 1+ year).

  • Anonymous Dec 24, 2008

    I have the same problem, but it's not limited to dust. There is also some kind of milky buildup on the inside of the glass. It can't be smoke, because nobody here smokes, but I'd hate to get rid of a perfectly good scanner because of this. What can be done?

  • judysj Jan 05, 2009

    Exactly the same as described by others -- dusty and smoky looking under the glass. Tried to get help from Epson (not under warranty) and was assured that this is "impossible." Guess not. Loved the scanner until this became an issue.

  • judysj Jan 05, 2009

    Same problem -- dust and smoky film on underside of glass. Epson assures me this is impossible. Guess not.

    Anyone know of detailed instructions to dismantle the scanner. It was a great scanner until this happened -- really don't want to spend $$$ to replace it.

  • Cathy Queisser Jan 18, 2009

    Yeah, I have the same problem with my Epson Perfection V200!  There are cloudy areas on the underneath side of the glass, and one area of cloudiness that is in a perfect oval shape.  What the heck is this, and how do you get rid of it?

  • Anonymous Feb 04, 2009

    yup, same problem here. my epson 4490 has a smoky film on the underside of the glass. I bought this scanner in '06, so looks like i'll either have to open it up to clean the underside or get a new one! argh.

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8 Answers

Anonymous

I visited the web site below and was able to clean the glass so easily. Works great now!

http://h10025.www1.hp.com/ewfrf/wc/fastFaqLiteDocument?lc=nl&cc=nl&dlc=nl&docname=bps05616#

Posted on Jun 27, 2008

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Anonymous

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Not so hard as it seems 1. Unplug the power, platen cover and USB/Firewire connections on the back of the scanner. 2. Remove the platen cover. 3. In each of the two deep slots where the platen cover hinges go there is a Philips head screw. Remove both of them. 4. VERY GENTLY lift the black cover at the rear of the scanner. There are tabs about 2 inches from each side that secure the cover. If you gently wiggle the black cover you can disengage these tabs and lift the cover off. 5. Slide the glass platen (and bezel side pieces) toward the back of the scanner until it is free from the bezel at the front of the scanner. 6. Lift it off and clean the underside and replace it using the reverse of these steps. 7. Reconnect the 3 connectors on the back and try the scanner. 8. If you have reassembled it correctly it should work like new.

Posted on May 27, 2008

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Anonymous

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Its easy. the top is held on by double sided sticky tape and two plastic tabs only.

use a small screw driver to break the tabs (located near the hinged end of scanner).

prise the edges of the plastic at the sides with a small screwdriver and slide a thin knife slowly along until they release.

remove glass and clean.!!!

Posted on Jan 27, 2008

Anonymous

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Unless the warranty of your scanner has expired, you have to disassemble your scanner and clean the dust inside.

Posted on Sep 08, 2007

Anonymous

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Unplug and disconnect the scanner.

Turn it over.

Using a long shanked #1 Phillips driver, remove the four recessed screws and DO NOT LOSE THEM!

Remove the bottom of the scanner and set aside.

Put a piece of black paper or black cloth between the scanner lid and the top of the glass; this will allow you to see streaks while you clean.

Using a J-cloth and non-ammoniated cleaner, wash the glass and immediately polish it with a dry j-cloth. Paper towels leave lint.
When the glass is spotless, reassemble and reinstall the scanner.

This is much easier than it sounds.

Posted on Dec 19, 2009

Anonymous

retiredbri

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FOR CANOSCAN 800F ONLY

A part solution may be built in - called FARE and it allows you to Reduce Dust and Scratches. (think it uses IR and can slow scanning down).
You need to read the manual and adjust the settings in Advanced mode to get at this screen shot.
Glass Dirty on the Inside - 8243f19.jpg
I just used plain, yellow paper as a test and the results are below.
Dust blob on left image, gone one on the right ie Reduce Dust and Scratches turned on (hope the site resolution shows the blob.
d336646.jpg
It wouldn't work if there was a feature of the image just where the dust is but it may help and is worth a try.

I'd still like to know how to get the case apart.

Posted on Nov 27, 2007

retiredbri

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FOR CANOSCAN 800F ONLY

A part solution may be built in - called FARE and it allows you to Reduce Dust and Scratches. (think it uses IR and can slow scanning down).
You need to read the manual and adjust the settings in Advanced mode to get at this screen shot.
Glass Dirty on the Inside - 8243f19.jpg
I just used plain, yellow paper as a test and the results are below.
Dust blob on left image, gone one on the right ie Reduce Dust and Scratches turned on (hope the site resolution shows the blob.
d336646.jpg
It wouldn't work if there was a feature of the image just where the dust is but it may help and is worth a try.

I'd still like to know how to get the case apart.

Posted on Nov 27, 2007

3 Related Answers

Anonymous

SOURCE: cleaning inside of glass scanmaker 4800

OK Just Stupid (G).... Open the lid, pull it up and off and you will see two screws below the hinges. If you have decided to purchase another scanner already, you are clear to proceed. Take these out, pry the halves apart until you hear a click. Push the upper section toward the control panel and the will come apart like a freshly caught oyster.

I would not only clean the inside of the glass, but would get a can of compressed air and blow the heck out of the area below the black thing. This should get most of the dust off of the mirrors (3).

I took mine apart and cleaned them, but, if you had problems opening the case, I definately would not try taking this assembly apart. It'll make you cuss.

Posted on Jan 02, 2008

Anonymous

  • 1 Answer

SOURCE: Yellow Streak on Images

I took the scanner apart. Then using a dampened eyeglass cleaning cloth, I gently cleaned the 3 internal mirrors.
No more yellow streak! :)

Posted on May 28, 2008

Jayant Jha

  • 857 Answers

SOURCE: need to remove top of scanner microtek scan wizard

Follow these steps to clean the scanner :
1

Open up your scanner's lid. It does not matter if the scanner is on or off for this basic, regular cleaning.

2

Wipe down the glass surface with a dry, lint-free microfiber cloth. This will remove any dust or other fine particles that have accumulated on the scanner. You should remove excess dust every day or two.

3

Scan a blank sheet of white paper into your computer and look for visible discoloration. A white sheet will provide a clean, blank slate to view the scanner's overall quality. If you notice any irregularities on the white sheet, you need to do more thorough, semi-regular cleaning.

Semi-Regular Cleaning

1

Turn off the scanner and open up the lid.

2

Spray a small amount of "mild glass cleaner" on a soft, clean cloth as recommended by Scanner-Magic.com.

3

Wipe the scanner's glass to thoroughly clean the area. You should perform this semi-regular cleaning at least every two weeks or sooner if a white sheet of paper indicates discoloration.

4

Keep the scanner's lid open for a few minutes until all excess glass cleaner has dried.

Posted on Nov 26, 2010

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Related Questions:

1 Answer

How do I clean the inside glass on my electric fireplace
To remove any dust, simply use a clean, dry cloth to wipe down the interior. Gently dust any media such as logs or glass inside your electric fireplace as well.

Cleaning Steps

1.Disconnect from Power Supply Before beginning to clean your electric fireplace, turn the heater off and allow to cool completely. Always disconnect the electric fireplace from the power supply before cleaning.
2.Check the Electrical Components Check any wires and plugs to make sure that they are not worn or frayed. This is a rare occurrence, but can become a fire hazard if not addressed. If this happens, consult a professional to repair or replace before using your electric fireplace again.
3.Clean the Heater With a clean, dry cloth, wipe down the surface of the heater. Using the soft brush attachment of a vacuum cleaner, gently clean the heater outlets. This will remove any dust or debris from the heater and keep it running at top performance.
4.Clean Both Sides of the Glass Follow the instructions in your owner's manual for removing the front glass panel. Once removed, you can clean both sides of the glass. Do not use abrasive cleaners, as they will scratch the glass. Dust can be easily removed with a clean, dry cloth. Fingerprints or other marks can be removed with a damp cloth; dry the glass with a lint free cloth to prevent water spots from forming.
5.Dust the Interior Dust may accumulate inside your electric fireplace, like any other unit in your home. To remove any dust, simply use a clean, dry cloth to wipe down the interior. Gently dust any media such as logs or glass inside your electric fireplace as well. When you are finished, place the front glass panel back onto your fireplace following the instructions in the owner's manual.
6.Remove the Soot Just kidding! You never have to worry about dirty, grimy soot with your electric fireplace. Instead, just relax and enjoy!

Nov 14, 2017 | Miscellaneous

Tip

Scanner Tips 2 " Don'ts "
<span>Never apply solution directly on the scanner glass. If you find that the glass is dirty or has a slight dust or smoke film underneath and on the inside, do not unscrew the lid and try to clean it from inside. It's always advisable to call an authorized service center. </span><br /> <span>Never use abrasives, isopropyl alcohol, benzene, acetone etc on the scanner glass, as this will streak and cloud the glass, and can Even cause damage. </span><br /> <span>Never place your scanner near heating vents or windows, or other locations where moisture might affect its functioning. Also remember: If you are moving the scanner from one place to another, make sure that the transportation lock is enabled, as this prevents the CCD array mechanism from moving. Push down the lock, which is located at the back of the scanner. Remember to unlock the scanner before you attempt to operate it, or you may end up damaging it. </span>

on Dec 28, 2010 | Hawking Contex HAWK-EYE Cx Scanner

Tip

How to Clean Scanner Glass
Steps how to clean scanner glass

1. Unplug the power cord.
2. Clean the outer case with a cloth dampened with a mild detergent and water.
3. If the document table glass gets dirty, clean it with a soft dry cloth. If the glass is stained with grease or some other hard-to-remove material, use a small amount of glass cleaner and a soft cloth to remove it. Wipe off all remaining liquid.
4. Ensure that there is no dust on the glass of the document table. Dust can cause white spots in your scanned images.

*** CAUTION: Do not press on the document table glass too hard.

5. Be careful not to scratch or damage the document table glass, and do not use a hard or abrasive brush to clean it. A damaged glass surface can decrease the scanning quality.
6. Never use alcohol, paint thinner or corrosive solvent to clean the scanner. These chemicals can damage the scanner components as well as the case.
7. Be careful not to spill liquid into the scanner mechanism or electronic components. This could permanently damage the mechanism and circuitry.
8. Do not spray lubricants inside the scanner.
9. Never open the scanner case.

***NOTE: Wipe the inside of the document cover and the scanner's document table before scanning transparencies.

on Jul 19, 2008 | Epson Perfection V200 Flatbed Scanner

1 Answer

The scanner glass inside is cloudy
I recommend you do not take off the glass. I have done it and was never able to get rid of the dust, which really shows up on every scan. The fogging has something to do with an optical coating on the underside of the glass. If I knew then what I know now, I would let it be. If the fogging doesn't show up in scans, leave it. If it really does show up, the glass itself is often held down by simple double stick tape. You try to keep the tape intact so you can put it back down. It may be strong enough that the plastic frame on top of it could snap. Do it in as clean (not dusty) environment as possible so dust does not drift down inside the scanner. Never touch the lamp or move the scan mechanism. Again, don't do it unless it's showing up on scan results. Sadly, nobody "fixes" scanners, they are disposable, like coffee pots, even if they cost 300.00.

Mar 12, 2014 | Epson Perfection 1650 Photo Flatbed...

2 Answers

Printer panel shows "scanner failure, turn power off and back on to reset". I turn the power off and back on and get the same result. When the printer comes on in tries to initialize and makes a loud...
i have found the solution:

first of all, the problem is that the assy of the scanner can't find it's parking place. because it's to dirty.
the scanner moves slighty left when you start it up, then it scans for a black and white bar that's right next to the glass plate at the inside of it. This shall be to dirty to locate.
look at next link to clean the assy and glass plate from the inside:
http://dmsaudiocorp.deep-ice.com/psc2100.htm
make sure you clean the mirrors, the lens on the bottom of the assy and the glass plate from the inside.
remove all the dust you can find but be carefull it's very fragile.
i used some glass cleaning spray.

for me it worked very well!!

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2 Answers

How do I clean the inside of the glass on the Epson 3490 Scanner?
Disconnect and remove the lid. Remove the two screws on the back of the base. Then use a screwdriver or flat blade to slightly open the back seam. Beginning at the back, run a blade up inside the upper part of the side seam. You will need to release three catches on each side. Once the sides are loose, raise the back of the top, while pushing forward, and the two snap catches at the front will release. The top then lifts off and you can clean the glass. Reassemble in reverse order.

Jul 03, 2009 | Epson Perfection 3490 PHOTO Flatbed...

1 Answer

Dirty glass inside scanner
To clean the glass on the inside you must disassemble the unit so that you have access to the underside of the glass. If you save all your screws and are careful to lay things out in the order you remove the it is easy to put it back together and you do not have to worry about breaking anything.
Once you have access to the underside of the glass I use real windex and newspaper. With the newspaper you get a streak free shine with no lint particles. If there is dust inside the glass there is most likely dust on the scanners optics. Gently clean them the same way. Be gentle when cleaning the scan bar optics. They are not extremely delicate but it will break if you apply too much pressure as it is a long thin piece of glass.
When you put your scanner all back together it will scan as good as new and all the little black specs and streaks will be gone in your scans. I've done this 100+ times and it works every time. If you need help feel free to contact me an I will walk you through it for free.
I hope you found this info detailed enough to fix your scanner yourself, But If you need some help or moral support feel free to E-mail me and I will even call you for free. Make sure to say what you need in your E-mail as I fix a lot of things for people.
George

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1 Answer

Canon Scanner
Scanners can be taken apart to be cleaned:  'You want to clean the inside?' 'Well, its dirty ikayak, thats why.' Ok take it apart, remember the screw sequences; that aint hard normally for scanners.
Put it this way there aint any little brushes or nanobots to clean it for you in there... you gotta do it manually. Use something alcohol based to lose smears and actual residue. It its dust then use a hairdryer and a soft SOFT brush that doesn't have any dust on it itself... you'll just make it worse.
I hope your scans are clearer now!

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1 Answer

HP 7410 Scanner mirror dirty
you can go tru this extract ON HOW TO FIX IT
clean the glass
Dirty glass, from fingerprints, smudges, hair, and so on, slows down
performance and affects the accuracy of special features such as Fit to Page and
Copy.
1 Turn off the unit, unplug the power cord, and raise the lid.
2 Clean the glass with a soft cloth or sponge slightly moistened with a
nonabrasive glass cleaner.
Caution! Do not use abrasives, acetone, benzene, or carbon
tetrachloride on the glass; these can damage it. Do not place
liquids directly on the glass. They may seep under it and damage
the unit.
3 Dry the glass with a chamois or cellulose sponge to prevent spotting.
clean the lid backing
Minor debris can accumulate on the white document-backing located
underneath the unit’s lid.
1 Turn off the unit, unplug the power cord, and raise the lid.
2 Clean the white document-backing with a soft cloth or sponge slightly
moistened with a mild soap and warm water.
3 Wash the backing gently to loosen debris; do not scrub the backing.
4 Dry the backing with a chamois or soft cloth.
Caution! Do not use paper-based wipes as these may scratch the
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5 If this does not clean the backing well enough, repeat the previous steps
using isopropyl (rubbing) alcohol, and wipe the backing thoroughly with a
damp cloth to remove any residual alcohol.
clean the exterior
Use a soft, damp, lint-free cloth to wipe dust, smudges, and stains off the case.
The interior of the unit does not require cleaning. Keep fluids away from the
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1 Answer

Dirty scans
Small white dots would indicate progressive failure of the CCD[sensor] or perhaps ingress of dirt to the inside of the glass. hard to say exactly with out seeing the machine.

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