As I was doing the 3702 boxes, and all the tools was there, I went on with the top cover for the BM 400, first I checked if the aluminum rack was realy anodized and not just painted, tested with acetone, it is anodized, to protect it from getting sanded I covered it with painters tape.

Sanding the side panels I hung the top cover over the table edge, to have support and not to brake anything.

After sanding I cleaned one more time with acatone and applied Old English oil as Rich's wife recommended (As Martin cant post anymore, maybe his wife can stand in for him), Just a little on a piece of good quality Swedish toiletpaper (kittchen roll) and apply, following the wood grain, let soke for a cup of coffee and a cigaret, dry of with a clean rag and apply a second time, let soke and polish of with a clean rag.

Finished, BTW Old English goes a long way, I used it for 2 speaker boxes and this top cover, and the bottle still appears full to top.

Here to show you what a beautiful job the Beo carpenters did in these days, the top and the side panels are made from one same piece of veneer. side view 1

Side view 2

Lovely work Soren, I always think that this is the best part of any project, the time when you give the woodwork a good dose of TLC.  A liberal coating of wax and a good shine seems to enhance the sound as well, making all of that work on the internals worth the effort.  You have here an excellent example of what can be achieved and it looks brilliant.

Regards

Geoff

Coming along nicely! 🙂

I was lucky not to have to do anything on my BM 4400 woodwork which is mint!

Most B&O gear damage is due to stocking and stacking, changing uninformed, careless hands, because the original owners would have taken great care of what they had I'm sure!

Fortunately, my newly acquired Beolab Terminal hasn't been in some shoebox with other uninteresting Japanese waiting-for-the-tip remotes!

I have the resistors that I have to change, but yesterday I had all the tools out fixing the boxes for the 3702s, I should have worked on the BM 4000 but I was nervous and afraid to do it, I'm a coward, but today I'll do it.😐

Søren Mexico wrote:

I was nervous and afraid to do it, I'm a coward, but today I'll do it.😐

😁 And shoot a video when you first plug it! 😎

Changed the 4 resistors, but no luck, failure is still the same, and the old resitors was OK, only some 2 to 3% difference, was checking right to left channel with and without power, and found some more points with voltage and resistance diff. will continue tomorrow

Søren Mexico wrote:

Today I went after my missing left channel, first I connected my BS 3000 from aux to tape1 in, to check if it was the reciever or the output stages, well, same failure, no left channel, following the drawing I started with the 70 V circuit, same V, L and R, went on crosschecking R to L.

After 1 hour reading drawing, finding the components on the PCB and drinking a lot of coffee I came to the middle of the board, and found this.