Hello again,

in the meantime I got a new belt from Martin and all worked as it should. With a little exception. When a CD is very long the last two or three tracks do not come. But I think I have already seen the reason: the CD wobbles and I think at the end its too much movement for the laser to read.  So I think I have to controll the CD-motor.

By the way, I just had the chance to buy a complete new kit CD 50 Terminal with original box, manual , installation description and electronic. Rather rare item now I think.

Bernd

No pictures: it did not happen!

You want a picture of that kit, right? I would post it but don't know how to do. I couldn't find any advice. Not so familiar with pc-management!

Disc wobbling can cause focus problems, that's true, but we must keep in mind that at the time of
Beogram CD 50 production, CDs were limited to a playing time of apprx. 74min (Redbook format).
The 78 and 80min CDs came later.
Most Beogram CD 50 versions will happily play it all, but I would never expect all to do it.
If your Cds run past 74mins this could be the reason.

Check the block number. It's on the internal label, sitting at the right side of the vertical
divider metal plate between the sandwiched circuit boards at the center and the rightmost circuit board.
It's a stamped or hand-written number/letter in the hex range (1 to F).
The number will not tell us how many and which (if any) post-production revisions were made but it
will tell the basic version.

Martin

Philips machines of this era will read wobbly CDs very well (and you can see the swing arm work hard, wobbling about very quickly!), but these Aiwa machines will have more difficulty to read badly centered ones, yes. My CDP-101 reads everything though. 

Thank you for answering, interesting infos. I am going to check it.

Very interesting information about that cd history. I checked the cd I had problems with and found out its playing time is 80 min. That's quite that what Martin told us! Two times the player stopped in the last track, but  I could restart it and it played to the end then. Seemed to me like the mechanic had to get used to play that long way. Of course I did some slight regulations to the cd platter. Now the cd runs more straight.

I checked that inner label, and it says : B 8 (not sure the stamped figure is not clear)  51211213. Does this number tell us something?