BM 4000 Problems

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W.Frankenberg / Gandalf Posted: Thu, Mar 29 2018 4:41 PM

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Hi @ all

I have a problem with my BM4000.
Some keys do not work anymore:

Filter low and speaker1 do not lock anymore!

The Loudnes and Ambio buttons are very hard to press, but they still work.

I once had a similar problem with my BM 3000 and had to disassemble the device almost completely to get to the keys.
Unfortunately, you can not replace the shift linkage so the repair attempt was out.
Does anyone have a tip for repair?

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W.Frankenberg / Gandalf replied on Mon, Apr 1 2019 9:48 AM

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is there no one who can help me with my key problem or give a tip?

I inserted a picture of the broken buttons,

the loudness button is pressed constantly and has no reset option;
Key Speaker 1 does not engage;
the filter LOW button no longer locks;
the AMBIO and MONO buttons are heavy-handed, but still lock;

How do I get to the key mechanics? can you fix something there?

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Keith replied on Mon, Apr 1 2019 10:33 AM

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Found this link it may help.

https://archivedforum2.beoworld.org/forums/p/33372/250876.aspx#250876

Keith

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W.Frankenberg / Gandalf replied on Mon, Apr 1 2019 12:45 PM

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Thanks Keith, that's exactly the part I need!

I'll ask Martin if he has any more available!