Hello,
Has someone a schema of the motorcontrol unit on the PCB of the motor? I have taken the motor apart and it's running, but the controller PCB has a problem. On the PCB IC808 (hall ic or PWM?), a thyristor, some capacitors and resistors.
I just want to see how this functions and if their are parts availbale. The IC808 search didn't show something on google.
Thank you for help.
Kind regards, Erik
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Beogram 3000 5901, motorcontrol schematic
9 replies
Some photos of the situation.
The motor was considered a single part so B&O did not publish the control-board schematic. What is the nature of the problem you are experiencing. Most of the time its the bearing drying out not an electronic issue.
Hi Mark,
I had a blown fuse and only the motor module caused this.
I have tested the motor and it runned but with noise. Now I have re oiled the bearings but didn´t test the whole again. Can dry bearings cause an overcurrent to blow the fuse? If so, then I have to install it again and test it. What is your experience?
I have reinstalled and motor is functioning!
Motor makes still some noise, from the brushes. So I have to look if these are still available.
Thanks all for your help.
I have a question on the main bearing (nylon fitting) but I will make a new topic / post
You do not apply oil to the bearing. It needs to be infused in a vacuum. My experience is that they are still the source of your noise.
Hi Mark,
thank you for your remark. I have seen some posts on this topc and I am thinking of doing this ("oil-vacuum") as well. But first I had to check if the other parts were all doing well.
Thanks for your help.
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