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Hardware Thread, D-Link DWL-3200AP High Pitch Whine \ Whistle \ Buzz in Technical; I have a problem with some D-Link DWL-3200APs on a couple of sites. Out of 20 I have had about ...
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    SYSMAN_MK's Avatar
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    D-Link DWL-3200AP High Pitch Whine \ Whistle \ Buzz

    I have a problem with some D-Link DWL-3200APs on a couple of sites. Out of 20 I have had about 6 making a high pitch whistle with wireless quality also going from high to low in the areas where these APs live.

    They are all approx 3/4 years old and have been trouble free in that time. Is this a common fault with these APs? Has anyone else had this problem?
    Last edited by SYSMAN_MK; 19th January 2010 at 01:57 PM.

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    Nobody had a similar issue? Got another 2 exhibiting the same fault now.

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    We have a number of these but I can't say I've come accross this problem..

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    I have some cheap D-Link ones still on site, its the PSU that goes in them that makes them whistle / high pitched noise I find, try swapping the PSUs around from a quiet one to confirm though.

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    same problem

    Besides the above post, have you found an answer or solution to the problem? I have the identical issue. Out of 6 installed, 2 are making the same noise you described. These are also the 2 that have been up and running the longest. I had to remount them in a drop ceiling to help suppress the noise.

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    Quote Originally Posted by john View Post
    I have some cheap D-Link ones still on site, its the PSU that goes in them that makes them whistle / high pitched noise I find, try swapping the PSUs around from a quiet one to confirm though.
    They are PoE so no external PSU to change.

    Well moving forward. After speaking to a nice chap at D-Link support I will, fingers crossed be getting them replaced. It's a known hardware issue. Now waiting for the RMA dept to contact me. The Bursa is going to love digging out the 5 year old POP.

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    Update

    Result! Bursa dug out the invoice and new units are being dispatched as we speak. Well done D-Link.

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    I have 5 that squeal. It looks like there are two caps on the boards that have failed. They used TEAPO SC series 1000 hour caps, which was probably not the best choice haha... I ordered some higher quality 7000 hour caps to replace them with, so I'll follow up later this week if the fix works.

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    Yep, success. The new capacitors fixed the problem, and now they're completely silent...

    If anyone else has any that are out-of-warranty and lacks soldering skills, I can repair them for you if you like for a nominal fee... I have plenty of new caps left

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    @Ehidle
    Can you please tell me the caps used to fix these devices. I have three of them sitting on my desk.
    Although new ones were installed, it would be nice to use the repaired one to expand the network

    Brian

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    Quote Originally Posted by ehidle View Post
    Yep, success. The new capacitors fixed the problem, and now they're completely silent...

    If anyone else has any that are out-of-warranty and lacks soldering skills, I can repair them for you if you like for a nominal fee... I have plenty of new caps left
    Hi E. Hidle.... is your offer still good? I've got 2 that are squealing their brains out! :-)

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    Quote Originally Posted by brianoforlando View Post
    @Ehidle
    Can you please tell me the caps used to fix these devices. I have three of them sitting on my desk.
    Although new ones were installed, it would be nice to use the repaired one to expand the network

    Brian
    The culprit is one of the taller capacitors, labeled C907 on the board. It is a 470uf 16V capacitor.


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    Quote Originally Posted by stanelie View Post
    The culprit is one of the taller capacitors, labeled C907 on the board. It is a 470uf 16V capacitor.

    And C908. I just fixed my DWL-3200AP.

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    anyone got some pics of the caps, I have 1 or 2 APs that seem poorly but haven't noticed a sound?

    EDIT: OMG I saved it from recycling and it's making a high pitched whine! I'm unable to get our PO so I'll have to repair...

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    Quote Originally Posted by chazzy2501 View Post
    anyone got some pics of the caps, I have 1 or 2 APs that seem poorly but haven't noticed a sound?

    EDIT: OMG I saved it from recycling and it's making a high pitched whine! I'm unable to get our PO so I'll have to repair...
    Here goes...
    Their location on the board is circled in red.

    cap_470uf16v.jpgcap_location.jpg

  16. Thanks to stanelie from:

    chazzy2501 (23rd May 2012)

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