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PostPosted: Mon Apr 21, 2014 1:08 am 
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Joined: Wed Jul 17, 2013 6:50 pm
Posts: 8
Hi,

I've got a pair of MFB 541 as well as 545 ( happy to have them ) and a pair of 587.

I've got a problem with one of the 541. Doesn't switch on. I tested the Relay but that's not the problem. I checked also the Fuse and it is ok.

I know my question is not easy to answer because it could be everything which causes the problem but any clue why it doesn't work?

Some suggestion what it can be it could help me to find quickly what's wrong here. Who knows maybe other people had the same problem :)

Thank you.

Andrea


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PostPosted: Tue Apr 22, 2014 11:42 pm 
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Rank: 22RH545

Joined: Fri Feb 11, 2005 11:02 am
Posts: 2030
Try to replace the 330u cap near the relais.
looking forward to hear from you again ...
Good luck !

_________________
Herman:
Voor je het weet weet je het niet meer !


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PostPosted: Wed Apr 23, 2014 4:20 pm 
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Joined: Wed Jul 17, 2013 6:50 pm
Posts: 8
Hi,

Thank you for your reply and help. I bought a cap 330mf 25V. Now the speaker switches on, works perfectly for 10 seconds and then the sound fades out distorted. The speaker stays on but no sound. Switch OFF and then back ON and the same problem.

:(

Sounds to me that I have to recap all the speaker...Is there any other thing I could do to make it work?


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PostPosted: Wed Apr 23, 2014 6:36 pm 
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Rank: 22RH545

Joined: Fri Feb 11, 2005 11:02 am
Posts: 2030
Did you notice that these capacitors have a + and a - sign on it ?
Do not change the positions of + and - ! Your problem sounds like you did .

_________________
Herman:
Voor je het weet weet je het niet meer !


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PostPosted: Wed Apr 23, 2014 8:02 pm 
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Joined: Wed Jul 17, 2013 6:50 pm
Posts: 8
Ops! I didn't noticed the polarity was inverted...

Thank you very much, now the speaker works perfectly. Just I can't screw the screw close to the electric cable. Seems that once the screw is screwed till the end it pushes the electric cable and switches off the speaker. Don't know how to fix it, sounds to me the switch button is broken or old and it mast be replaced.

Do you think I can find it?

By the way thank you very much. Happy to listen to my music thru the 541 again.

If someone is reading this I have a pair of 587 which I would like to exchange with a pair of 544 with the textil mid and tweeter.


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