I don't know if it is the case here, but on some B&O systems the plastic parts i not a connector, but more a kind of strain relief for the cable. In that case you will have to unsolder. Not easy to see if that is the case here

Thanks Mad - I’m thinking that’s the case here, as a firm pull doesn’t give any success. There is a YouTube video of Kose Trading just pulling the cable out on a Beogram 3000, but I’d prefer to take the educated route before getting ham fisted. If anyone else can chip in that would be appreciated.

Clutching at straws but the service manual shows P6 as being a 'socket 6-pins' and in the exploded parts diagram PCB1 is shown with just the socket in place (no attached plug or wire showing). The 'plug' would then be part of the connector from the muting module (module 11). I think it should come apart.  (It's possibly a old Molex right angle PCB connector - something like this:  EDIT 2:  This advert appears to show your BG4500 board with the connector disconnected: 

Location: Warwickshire, UK

My B&O Icons:

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Beosound.png

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Beosound-Essence.png

Beoplay-P2.png

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Beoplay-H4.png

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Really helpful - thanks Guy. I’m using a component kit from Condor to recap the PSU board, main board and RIAA as well as new diodes, a couple of op-amps (SMD so will leave those to an expert) and new 33&45 trimmers. I know it sounds like a know what I’m talking about, but I’m basically learning as I go along and it’s very interesting and fun following the circuit diagram and finding out what everything does. Ive dropped Menahem an email on the connector, so hopefully he can help. Cheers Jonny

The Kose board with just the connector shown was I think the same one from the video where the cable just pulled straight out. Tried doing that again and no joy, so going with a de-solder. At least that will give me the opportunity to see how it all goes together. The clip on top of the connector also appears to have little prongs to separate the cables as they enter the connector.

It was not meant to be disconnected. I always desolder the connector from the board. Martin

Putting everything back together, although still awaiting the RIAA back from my expert in SMDs. Out of curiosity, can anyone enlighten me as to what the mica plate is for under the PSU board ? It appears to be a shield for the component that sits on top of it, to stop dust getting in, but allowing someone me form of cooling ? I may be totally wrong, but always keen to learn. Incidentally, that spring clip is a b ugger to get back on ! Cheers Jonny  

A very Happy New Year to everyone on the forum ! I’m taking the opportunity of a quiet couple of hrs to try and sort my 4500. Since getting everything back together I’m having a few issues. The arm won’t track, datalink doesn’t work and I’m only getting sound on one channel. I think I may have found a culprit in the pesky ribbon cable I was talking about earlier in this thread. Two of the prongs (both outer ones) have become detached. I’m not sure what they control, but it looks like I need a new ribbon cable. Are these available anywhere ? I could get away with creating single wires in place of the broken prongs but would prefer the correct bit. Thanks in advance. Jonny  

Couldn’t find a ribbon cable new or used so ended up making my own solution. Learned a lot about ribbon cables and connectors along the way. My ribbon cable had a pitch of 2.54mm (1/10th inch) which was used back in 89 and is still in use. This allowed me to find some Molex connectors which could be soldered to the board and I now have a bespoke cable set up with detachable connectors, which will make future fiddling a lot easier. Hopefully I won’t need to do too much fiddling in future, as I’m pleased to say everything now works again as it should. Tracking back on, both channels working and datalink operative. Happy days !