Question about Canon CanoScan D646U Flatbed Scanner

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Dirty Glass How do I open the scanner to clean the glass within?

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The answer was very simple actually. I just had to remove the cover by pressing the plastic "wings", and found at the bottom of the space thus revealed the two screws I needed to unfasten to remove the top cover and clean the glass.

I found this answer on my own after not having received support from anybody, and that DOES include Canon websites who do not allow you to ask them direct questions. So far for post-sales customer suppor! It really makes you think before buying anything from these peole again....

Posted on Feb 22, 2008

  • fais1234 Mar 15, 2011

    Thanks to Bertican. I just translate it into our language.
    Pertama lepaskan cover atau pentutup. Setelah cover atau penutup lepas kamu akan melihat dua buah mur. Lepaskan keduanya. Setelah itu lepas bagian atas scanner dengan cara didorong atau ditarik mendatar seperti kita menarik laci.

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1 Answer

Backside Optical alarm (G) when using Duplex option


Hi Rasha,

ADF backside scanning optical alarm (upper optical unit ADF) is E3 alarm. When there is an irregularity in the amount of light (ADF back), "E" and "3" will be displayed alternately on the function number display panel of the scanner.

Please check the followings:

1.Does the same symptom occur after turning OFF and ON the scanner?
2. Is the lower glass (white sheet guide) of the reading section dirty? Open the ADF, and clean the sheet guide (white part) and the glass.
3. Is the upper Optical unit ADF dirty? Are the cables damaged? Are the connectors connected properly?
4.E3: Is the upper lamp ON? Are the cables damaged? Are the connectors connected properly? Disconnect the SCSI cable and turn the scanner ON. Open the ADF and press ADF cover open sensor as shown below to see if the ADF lamps light which has to be replaced.

I would recommend to contact an authorized FUJITSU scanner service provider or the dealer where you purchased the scanner.

Hope the above information is helpful.

Thanks & regards,

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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.

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Hi
You clean this scanner all mirror by soft cloth.When this mirror is dirty then all emage are not clear,so you need clean it.If you are a technician open your scanner Platen glass very carefully and clean all mirror then fix it.

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Hello,

A black line down a scanned page indicates a dirty scan glass. Lift the top of you scanner like you would putting a page or book down to scan. On the end of the scanner that has the document feeder you should see a thin piece of glass the is separate from the larger glass pane. This is the document feeder glass. Now check it over for a very small mark of ink or dirt. You can use regular glass cleaner to wipe this glass just spray it on a piece of cloth not the scanner then wipe. You may have to wipe and then try scanning several times if the ink or marker is died on. while you are cleaning you should also clean the main glass pane, it will make the scans clearer and crisper.

I hope this helps, if so please rate our solution.

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1 Answer

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How on earth did the underside of the glass get dirty?

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Suggestion... How is the printer you have holding up? If it's getting on in age, it may be a wise investment to purchase a dual scanner/printer (as long as you are spending the money).

Hope that helps :)

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Make certain that the scanner is not only turned off, but unplugged. And disconnected from the computer.
Then gently lift the glass off - the glass on which youy place whatever you want to scan.
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Also, if the bulb inside is truly dirty, you can gently clean the bulb.
Replace the glass cover, and reverse your procedure.
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Clean the glass and it will go away.

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1 Answer

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1 Answer

Color streaks on ADF feed.


Sounds like a dirty seal glass.
The small srtip of glass on the left side of the scanner.
Clean it well.
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Use a regular piece of 20 pound paper crumpled with some glass cleaner or alcohol and clean that glass thorughly

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