Question about HP Scanjet 3400c Flatbed Scanner

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HP Scanjet 3400 C

I cannot clean my glass inside the HP Scanjet 3400 C.

How to open the casing to release the glass ??
Gerhard Fuetterer

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  • william_cv01 Aug 12, 2008

    Scanjet 3400C

  • nocturne6 Sep 05, 2008

    I would like to open the case to clean the dust from the inside glass of the scanbed. It is making spots on the things i scan.

  • Anonymous Oct 06, 2008

    I had the same problem with my 3400C and actually managed to get it open. I lifted off the cover/lid and it lifts right out at the hinges. inside the hinge area are plastic latches, i used a flatblade screwdriver to depress that and it released. Then I could see some of the same type of "snap in" latches along the sides of the case where the top snaps to the base. I just used 2 very small thin flat blade screwdrivers from my computer tool kit and very gently worked my way down the sides opening them. Putting together again was the easiest part. Just be real careful and gentle with the side latches. Patience will win out. Mine is clean and now scans beautifully.



    It is obivous that HP does not want users to be able to fix this themselves, but it is possible. I did it. and I'm a 48 yr old mother of 3, not a technician, just a typist type.

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3400c after latches under cover slots, first clip about 3.25 inch next 9.75 inch, along the long sides from latches , then slide out ,use thin driver , like lady said
BUT while in there , take a Q-tip and some 10-30 or what ever oil , and LIGHTLY no not one drip , oil the round bar and a little on the wear surface of the square bar ,this will stop a clicking noise .Clean glass to , never turn a scanner upside down , dirt falls on glass again .

Posted on Jan 15, 2010

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Preciso do drive desse scanner pois não consigo estalo só pela usb

Posted on Dec 08, 2008

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Unfortunately, The 3400 series cannot be cleaned on the underside of the glass. Scanners with the capability of having the under side of the glass cleaned are listed below.

Posted on Oct 04, 2008

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Hi ,
You probably already found this :
http://h20565.www2.hp.com/portal/site/hpsc/template.PAGE/public/psi/performMaintDisplay/?sp4ts.oid=297429&spf_p.tpst=psiContentDisplay&spf_p.prp_psiContentDisplay=wsrp-navigationalState%3DdocId%253Demr_na-c01275864-2%257CdocLocale%253Den_US&javax.portlet.begCacheTok=com.vignette.cachetoken&javax.portlet.endCacheTok=com.vignette.cachetoken
According to it , you should normaly contact a HP technician to have the job done . Nevertheless , I succeeded to clean the underside of the glass inside a HP Scanjet 5470C wich seems similar to your model 2400 . If you take of the lid of the unit , you should find two screws in the opening of the hinges . Unscrew them and lift up the the whole top of the unit . You might encounter somme kind of resistance during the operation but I finally succeeded to get the it free that way .
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You need to remove the protective glass (be careful when releasing the lock, and use gloves if possible - fingerprints may be inconvenient to remove; use solvent-free window cleaning fluid and a little water, in case) and clean the head using compressed air and a soft, lint-free cloth. Then reassemble.

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Is the glass clean?

Often the plastic will out gas and it will deposit a film on the glass. You might have to open it up and clean the inside of the glass with window cleaner. There is also a mirror in the scanner head. That can get fogged up too (in fact it gets fogged up more frequently than the glass plate). The trick there is to find the mirror below the slot and then clean it with a q-tip that has been dipped in alcohol.

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