Ok, one step further.

it was the switch, which shows the motor that it can start.

adjusted the biggest wheel again and put some grease everywhere needed.

now the motor starts and runs really freely (first in the one then the other direction) - all without a cd.

when I put a cd, the motor cannnot move it (I hear him trying 🙄).

changed several times the distance between the Downholder and the chassis.

All around 5mm

cannot make him turn the cd.

i measured the voltage during spin. All pins below 1v. Seems to low, isn’t it.

does anybody know, what voltage powers the motor? Maybe there’s the error

best regards and thanx for any help - it’s my first cd50

69er

I think it's just a matter of adjustment, starting with the cam wheel position and the turntable height.

You really should have marked everything... now it will be trial and error I guess.

Hi chartz,

yes, I expect some trial and error.

but only on the height, as I got it until this point now.

motor drives (without cd)

but just to be sure, that there is not an electrical issue:

does anybody know, what voltage makes the motor turn?

i measured only something below 1v

best regards

 69er 

Just checked again,

it’s more something about 2,9v. Got this on several pins, measured against the far left (brown).
But only short.

the voltage then shrinks down to mv.

really tricky this cd50

best regards 

69er 

The large cam cog has to be fully rotated, such that the cam follower engages with the microswitch to enable the disc motor to be triggered. Try helping the wheel round, sometimes it can struggle with the final few degrees of rotation.

Exactly my thought. 

Thanx, but I am over that.

Large cam cog is working. The switch gets contacted.

the motor turns, but he cannot move the cd.

the motor is being cleaned, so I think it’s freely rotating.

if I simulate a cd, then it runs. But with a real cd, he’s not strong enough 

idiotgap wrote:

I'm looking at my CD-50 right now, it's in ok shape and I think we can make this work. Problems are:-

1. I'm struggling getting reliable drawer movement and disk clamping, I just can't find the right position for the brass nut on the cam spindle which allows me to have both. I think I will try to replace the belt and see if that helps me get that working.

2. When the disk clamps correctly and it reads a disk, early tracks start playing at 30 to 60 seconds in. I gather for this I need to clean the motor, so that's on my list to do.

3. I'm missing the metal pieces and screws which hold the case together, I'm not sure how to go about replacing those. It probably doesn't matter if this forms part of a stack, but it's a bit irritating. Are these things available anywhere?

I am in big trouble at home, since I last posted here I've been compelled to buy 2 Beogram 2000 turntables (one old wooden type and the other is an 80's aluminium version, plus a pair of redline speakers (45.2). I think the aluminium turntable and the CD-50 will look great in a mini-stack together.

Anyway...
1. I bought a belt from Martin, fitted it and now the cd loads and clamps beautifully. Success!
2. Job for tomorrow is to refurb the cd spindle motor. 
3. How to deal with missing case clamps is still a mystery, I'll have to hunt around a bit more on that.

Sorry, I don’t understand your answer to the above mentioned issues

69er

Hope this explains things a little more clearly.

1. Adjustment of the brass nut on top of the large cam wheel was proving tricky
Too loose -> the transport was free to move so the disc would load in and out of the machine easily, but the disc wouldn't be read. Loosening the nut lowers the cd away from the motor
Too tight -> the CD transport needed too much effort to move and the disc wouldn't load completely, though if I helped the cam wheel move through it's complete rotation the disc would load successfully and you could listen to a CD.

I ordered a new drive belt from forum user "Dillen" aka Martin's webshop https://www.beoparts-shop.com/
The new belt was half the length of the old one, I wonder if someone had tried a random belt as it wasn't degraded, just baggy. The new belt, once fitted allowed the transport to move more confidently and I was quickly able to get the brass nut adjusted to allow both disc loading and clamping.

2. When reading CDs the player would start part way through track 1, maybe a minute in. As covered earlier in this thread, the remedy for that is to clean the spindle motor. I did that this morning and now the discs read more quickly and it plays the whole track, another great result!

3. I still have no solution for this problem, the case of the machine comes off easily, there are no screws holding it on to the chassis of the machine. This doesn't cause a problem in normal use, though it's a bit annoying.I'm still looking for a solution to this, not having the existing hardware or other similar pizzabox machines I'm not even sure what to fabricate.More research needed.