Thank you very much. 🙂

I already have the scematics but i couldnt understand where are the speackers and how they are connected... after all i dont want to try a wrong connection with a bad interpretation of the diagram.Thats why asked for some images.

😕

I think I have a BM 901 open somewhere, will look for it later today, and see if I can get a pic of the connections

That will be great !!! 😁

Thanks! 🤒

Apparently there are 3 different types of the 901, one with 2 speaker jacks, one with 2 speaker jacks and headphone jack, one with 4 speaker jacks and headphone jack. Mine is 4 speaker and headphone. I strongly suggest you make the connections according to schematics, if you cant read or understand the schematics please look for a technician that can.

The connections comes from here

And goes here

Thank you so much for the images.

Mine its two speackers and headphone.

I can see the board is a bit different, maybe i can connet the speackers in the same output of the headphone (??)... i have tryd the headphone and theres lots o hum and distortion.

I gonna study better and see what happen.

Thanks again! 🤒

The speakers positive wires goes through the headphone switch, and then to the speaker jacks if you have hum in the head phones there may be more failures like electrolytic capacitors

Thanks Soren again.

Thats what i thought to... capacitores or in worst case transistors... because one 39k resistor burned... i have replace a new one with the same specs and it burns again. 😕

The positive wires goes throught the headphone and the negative wires where are they connected?

Thanks 🤒

Negative is connected to the flat pin of the jack and to ground ("0"), if one of your 0.39 Ohm resistors keeps burning check your output transistors and all the diodes 2D19 to 2D26 if the output Transistors are bad, change all of them 2D21/22/30/31. and then all the small transistors in the output stage (B&O recommended that), Check your bridge rectifier

Thanks Soren again.

I left my 901 with a technic.

Hope it will comes alive again... i let you know.

Thanks!

🤒