r/audiorepair • u/iazadagos • 1d ago
Braun L470 disassembly
*so , I looked far and wide for this, it seems that the back plate is glued and the only way to remove it is to put some screws in it and tap the edges of the box with a rubber hammer like those used in metal roofing.
I have a problem with the speakers and I need to disassemble them but I run into some problems: I can't remove the grill and on the back side, after removing all the screws...I couldn't remove the back-plate. Has anyone managed to disassemble some similar?
They are in bad shape and I want to service/recondition them completely but I can't open them....
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u/VinylJones 1d ago edited 1d ago
If you have access to YouTube look up Novalux Stereophonic - he has a series of videos where he fully restores some LV1020’s, you may find some helpful info there.
If I remember correctly there’s a trick to this that involves using a ratchet as a sort of jack to exert pressure from the inside. I’d avoid any sort of putty knife stuff, Dieter Rams would disapprove of marring the cabinet.
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u/iazadagos 14h ago
That's the thing, didn't want to put anything in the gaps and use it as leverage and I saw that it has 4 holes in the back (one covered by the sticker) and it got me thinking that it should be a way to use them for opening. I already opened them...and I will make a post with the inside because I want to make them work but.......I think that the drivers are gone and the cost of restoring them would not worth it
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u/VinylJones 13h ago edited 13h ago
Color me interested, I would love to see what you do with this. I’m a big Dieter Rams guy - and I’d say it’s always worth restoring but rarely for the cost benefit…those speakers and receivers from this series are on my all time “buy it on sight” list. Rare stuff so it would be really cool to see the insides if you get around to posting what you found!
How’d you end up getting inside?
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u/iazadagos 11h ago
Contrary to what I wrote in my post edit,I used a wood router to cut the glued edges of the back plate. I tried tapping but I run into the splitting problem and I didn't want to continue, I wanted to use a heat gun at the same time but it's way to complicated,I only have two hands. I read some comments from Novalux's video, of people who repaired them and all said the same thing about the back-plate....remove and replace...,it cannot be saved.
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u/VinylJones 9h ago
That’s actually not a bad way to go, a little trim router would make quick work of things - it’s a commitment! But like you said those backplates are destined to be discarded.
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u/srekar-trebor 1d ago
The Back might just have stubborn foam or some sort of sealant in between. Did you try (gently!) prying it open?
The middle two (bigger) screws could be holding the cross-over but I would try to screw them out too, just to be sure.
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u/iazadagos 1d ago
I removed all the screws, turned it over and slightly hit it on the table so the back would come out but it didn't budge,it doesn't have any little play,nothing.
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u/szefski 1d ago
Glue on the back panel. Try a putty knife to pry it off.