I have traced back the orange to the connector and the voltage on the orange pin is about 3v and the black pin about 0.5v. I had assumed that the black lead would be returned to the common chassis but there is no connection between the relevant pin and the chassis so perhaps I am wrong. John

Thank you Martin, I think I have found the points to measure the motor supply and have no voltage. Just to confirm that I measured the right place, a black and a red lead come out of the motor sub-assembly. They go to a small pcb near one of the solenoids and the red lead connects with an orange lead from the wiring loom. This is where I made the measurement

I have looked again at the workings with all opened up and a tape in the holder. The connector is properly seated but there was no sign of movement anywhere except for the heads. I removed the belts and the motor showed no signs of life. There is indication of power to the deck because when switching on the supply there was a click from some relay and

Thanks for the information Martin. It is reassuring to learn there are only two belts. I must have a more serious problem, when I select any function neither of the spools rotates nor do I see any signs of the capstan rotating. I had wondered whether the motor had failed but I am still certain that it worked before I took the deck out I did unplug the

I have a problem with the tape deck on this kit. Originally, when I got it, the tape didn't work. When I removed the deck it was clear the drive belts had changed to black goo. They were so bad it was impossible to see where they fitted. I could only find two sets of drive belt pulleys so I got new belts for these. I did check the motor by switching

Yes Peter it is a pity because the 900 is very impressive . I have now persuaded myself to have another look at a Beocenter 7002 that I had stacked away because I could not make sense of the service manual. I will start another thread om this as I think it will be a bigger problem. John

It's the twin tape model. I have just realised that I will have problems with the Beomaster 900 as I think it will need a pre-amplifier with this cartridge but I think the 4000 might be OK.

MMC 3000 for the beogram 1500 and I intend to try it with a Beomaster 900 though I have a Beocenter 4000 that I might also use. I have a puzzle with this one as I can't understand the tape . It works OK but I can't get the stop button to do anything. To stop I just turn off the whole set or FF the tape to the end when the auto stop works. As

Just to tidy things up. I took out the steel retaining clip and put some penetrating oil on the plunger. With the clip out, I could put a pin in the hole and rotate the plunger to free it. This didn't take long and now with some clock oil to lubricate it, it works a dream. I have also a Beocenter hidden away because I made a mess of things. (It

Many thanks Peter. Things move quickly on this Forum, I read through the thread you quoted and the information is clear and comprehensive. I found the pin concerned and will follow the instructions to free it. I am glad I asked, because if I had gone the way I first intended I might have had a major disaster. Thanks for all the help. John