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BM4400 Spares or Repair

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Craig
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Craig posted on Tue, Feb 13 2018 10:08 AM

How hard can it be?


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Craig
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That's very encouraging Peter, thank you.....but lets not loose site of the fact that everything I do is made possible only with the guidance I receive from the more knowledgeable members of this site ;~)

Replaced the dodgy IC and also fitted a new variable capacitor to the Basket case stereo decoder.....ended up with 4 spares of each due to min order numbers......but they were very cheap it has to be said, so if anyone is in need let me know.  


Beo_Jean
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Graig,

If I can share a little bit of my recent experience, please do yourself a favour and change all 6 jumpers from the IF board to the tuner box.  I was done with my project and found that FM was no longer working just before closing the hood.  The jumpers tested good at both ends but all the way open or high resistance when measured from the inside of the tuner box to the solder points of the IF board.  Four out of six were holding by the wire sleeve only...  Common problem apparently...

 

 


Craig
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Completed the work on the bottom plate, new feet.


Craig
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And the pre amp board....


Craig
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Pretty much done with the sides of the case now........top is taking a bit more time.


Craig
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Recap complete....replaced burnt out lamp in the radicator and repaired a broken wire between the tuning lamps, now functioning fine.


Craig
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And the casing is coming along nicely.


Beo_Jean
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Beo_Jean replied on Thu, Mar 15 2018 12:36 PM

Well done Graig!

I never did veneer capping, how hard it is?  Do you have to remove the old veneer first?

sonavor
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Nice work on the veneer.  I see you used Titebond veneer glue. Did you use a vacuum press or did you use a flat board and clamps?

Craig
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Craig replied on Thu, Mar 15 2018 6:35 PM

Applying veneer isn't particularly difficult actually.....one needs to soften and flatten the veneer first, lots of info and videos on the internet about this, and also about the gluing and finishing procedures. I researched applying veneer on top of existing veneer and seemingly as long as the existing veneer is still in good condition and firmly attached there should be no problems....I've done this twice with fairly good results. As for the gluing I cold press the veneer to the substrate (the board your gluing it to) and leave it for 24hrs. 

Craig
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Well.....this is as far as I can go, still short a power switch and of course the preset cover, Martin....got any left?


Craig
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To be honest I'm not too sure about this colour.


Craig
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However given its condition when received I'm quite pleased with it, sounds spectacular, as one would expect, also. 


sonavor
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Very nice. Excellent work. I can't say I am a fan of the veneer color but you did a fantastic job with rebuilding the case. The nice thing is you could always make another set of cabinet panels now that you know how to do it. I think I would choose rosewood veneer just because that is my personal favorite. I enjoyed your thread. Keep up the good work.

-sonavor

Søren Mexico
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Agree with Sonavor, I will get to the switch this evening, sorry but didnt have a chance before. As luck will my son is visiting from Denmark next week, if the switch is OK he can bring it (or whole assembly) back to DK and ship from there

Collecting Vintage B&O is not a hobby, its a lifestyle.

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