For a capacitor replacement of the M100-2, I have determined this list per the service manual. Those values don't always match what is actually in the manufactured units so does anyone have a good list of the electrolytic capacitors for these speakers? (I am not ready to open mine up yet).

C2  - 16uF 50V
C3  - 50uF 50V
C4  - 50uF 50V (or 5uF ?) ...The schematic in the manual states 50uF but the parts list says 5uF. I think it should be 50uF.
C5  - 8uF 50V
C6  - 50uF 50V
C7  - 16uF 50V
C8  - 8uF 50V
C9  - 12uF 50V
C10 - 50uF 50V
C11 - 4uF 50V

---
Protection Circuit
C14 - 100uF 40V
C16 - 1uF  100V

-sonavor

Thanks for all the info!

I found a link in the old forum to link  (same as link) who repair these, called them and sent off my speakers already (I am in The Netherlands). 

The link to the special foam ring for the phase link is also them! :-) (

"Is your woofer surround also rubber?" - yes, and it looks fine apart from the dent in the paper dome in the middle. I'll leave that as is, I don't think the center dome adds to the sound.

Same for the 3rd speaker. I don't dare to put a vacuum cleaner onto it, even on low power, afraid to break it. Is there anything behind that thin rubber layer that is also dented?

rick

Beware of recapping: I have this not very clear image of the schematic, and some of the caps seem to be unipolar ones! At least, they are drawn with two non-black-filled rectangles as opposed to the "true" electrolytics. Can't discern any +/- signs in my schematic. Just one is drawn truly "polar":

Not sure if recapping really is necessary. If the caps don't get warm they may last a very long time.

The schematic says M100-2 type 6319. I have M100, and it's type is 6309, so probably a bit earlier.

rick

Mine have (had) a perforated metal dome, but they were only glued on. Just for protection I guess. I still have them, but where...

rick

I have recapped a number of my Beovox speakers and yes, the cross-over, electrolytic capacitors are bipolar (uni-polar). Dillen on this forum (Martin) has some capacitor kits for the various Beovox speakers. There are also speaker supply shops online that sell capacitors in the ranges speaker require as well. I haven't found any difference between the more expensive, poly type speaker capacitors and the electrolytic ones. One way to determine if a recap is needed it to remove the cross-over, then unsolder and test the capacitors with an ESR meter. You ought to at least examine the cross-over boards. If they are still clean (nothing leaking) then there is no hurry to leave them intact. I still plan on recapping mine.

Regarding your phase-link question, Phase-Link was Bang & Olufsen's design solution to speaker phase distortion. Here are some snippets from the M100-2 literature.

rickjansen wrote:

Mine have (had) a perforated metal dome, but they were only glued on. Just for protection I guess. I still have them, but where...

rick

If you find them can you take a picture of them and post it?  I might want to see if I can make a replacement for mine as the protective domes are missing on mine.

Will do! May take a few months as I'm in the middle of packing for moving house, so I don't know where they are right now! :-)

Thanks for all info people! Much obliged. Will report back on the repair of the phase link speaker.

rick

Just got the repaired phaselinks back from link and they look as new:

Putting the speakers back in the box is not easy, the wires are very very short, and glued to the casing. I ended up extending them a few cm.

Unfortunately, now my Beomaster 8000 refuses to startup properly. I'll start a new thread for that.

rick

Where on Earth did my post yesterday go??

Out into space or?

Anyway,new trial.

The filler is a Peerless KU45MRF since it has foam surround.

There also exists a version with doped surround called KU45MR.