Re: M-Audio BX5-a (Bad Caps)

Thanks Khron and Per Hansson for your help so far, much appreciated!

Yeah who knows, I wouldn't exclude that I broke those amp chips somewhere on the way When I started with this a while ago, I lost one of the glimmer plate isolators to the heat sink, before I understood that those need to be fully isolated, so could have fried them already back then..

I have ordered now a couple of TDA2052 from China, so that will take some weeks I am afraid, but once they are here I will solder them in and report back if that helped......

Re: M-Audio BX5-a (Bad Caps)

Hi guys,
damn now I wrote rather extensively and then I failed when uploading the pics so text disappeared, I will write again, a bit shorter..

I resoldered the spots today, good catch, the one for the LED in the corner!
Seems now the caps are properly connected at least, still problem remains though...

So I measured the diodes with and without fuses, it looks like this:

WITHOUT FUSES:

Transformer I think was around 23.7~ twice.

PLUS / MINUS
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Re: M-Audio BX5-a (Bad Caps)

Thanks guys!

I will do what you both suggested and then report back when I have some more info / re-soldered those!

Re: M-Audio BX5-a (Bad Caps)

Hi,
thanks a lot Khron for your post!
I will put some photos... On one of them you can see the bad filter cap(s) clearly, but as said changing them didn't help much.. If more photos needed just let me know..

The ripped off soldering eyes don't look so nice but connectivity is still there..
I am wondering still about the low voltage on the negative regulator.. Is there anything I could check around that one, or does that have possible other reasons, like the amp chips?

Thanks in advance!
O...

Re: M-Audio BX5-a (Bad Caps)

Hi guys,

this is my first post here in the forum, so I thought I will recycle this old thread..

I am Oliver from Germany, currently living in Finland...
I soldered quite a bit in the past, mainly built tube amps, guitar effects, repaired my pinball machine with some guidance and this kind of stuff... However, I am more of an IT guy, but not a studied electronic engineer, so I have some basic understanding of circuits but not too much.. Always willing to learn though, fascinating topic

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