Thanks Guy, I do have the manual, so I'll give it a look. At first I thought 3 turns as well, so I might play around with it a little more. The main problem is each slider and system will affect the others, so if you have something wrong, and rework it, you could easily un-do your previous work on a completely different slider.

(slight edit, I am a Gold member, just don't have it linked to my forum thing.)

If you send Keith a PM he will be able to upgrade your status to Gold.

My BC9500 is packed away at the moment so I can't check the number of turns.  However, next time I visit my mother-in-law I need to change the door drive belts for her BC9500 so I will have a look at a working example there.

Good luck with the rest of the restoration - while it is open I would probably replace the mute relay and also the battery as it's only a matter of time before these fail.  Personally I wouldn't touch the CD player capacitors unless it stops working.

Keep posting updates - it'll be well worth it when finished ?

Hi I restored two BC9500. 2 loops around the driving shaft is correct.

The most important thing is that both the shaft and the thread are clean and free of grease. Personally, I have simply mounted the threads the other way around to have clean thread around the shaft again.

The reason for this is that the motor simply has a time control for opening and closing. This means that the friction between the shaft and the thread must be so great that the door moves. As soon as the door is in one of your system, the thread must slip through without overloading the drive.

This is also the reason for the whirring noise when you switch off the system. The BC never knows if the cassette door is open. It therefore always runs the motor for the cassette door when it is switched off in order to close a possibly open door. If it is already closed, the thread on the shaft simply slips through.

Well, I had it set up with all the strings doing the two loops around. However, the lower cassette door string was too loose. So I re-did it with three loops around. While it was a little tight getting the knot back into the slider, it worked. However, then the upper CD door string was too loose, and the door wouldn't open properly on its own.

So this is a very frustrating issue. I'm currently playing around with three to see if I can get that to work.

Motorman, I fully agree with your take as well. So I'm just struggling with this project.

The next big issue is: When I received this item, I could turn it on, change inputs, ect. At one point much earlier while trying to figure out the door issue, I had the Beocenter up in the service position, and I tapped on the "Load CD" sensor. From that point on, the Beocenter lost power.

I opened up the fuse panel last night, and checked the fuses, all were good.

With regard to the doors, did you fit new door motor drive belts yet?  This is definitely worth doing so that the whole mechanism can operate as designed.  Otherwise you may find that the third cord turn is compensating for (or causing) motor drive slippage.

The power down problem sounds like a loose connection in one of those many cables that has to bend through an extra 90 degrees when you put the system in the service position!

link

My BC9500 is packed away at the moment so I can’t check the number of turns.

I just managed to access my BC9500 and open the box. There are three turns in each of the four locations - here's a photo of the top of the CD door drive shaft: Login to view image

Hi Guy,

thanks for the picture and I rechecked with mine. 3 Loops is correct. I was "on the wood way" as we say in German ;-). For the sliding doors it is also important that the sliding grooves are really clean and only slightly lubricated. Regrading the loss of power I also agree with you that it is probably a loose cable connection.

Thanks guys! I will check the connectors on the boards.

Yes, I do have new belts on the door motors.

Last night I was able to get all the doors stringed properly. I double checked all the connectors to the PCB's, and buttoned up the Beocenter. Still it will not power on. I even tried a few different outlets. So the project is on hold for now. I want my dining room table back.