Nope, measure just fine - replaced it with a new 547B and no change.

I'm going completely bonkers 😡  😕

/jesper

Does the eject signal look correct?
Did you replace idler rubber parts or take the deck apart?
Does the tapehead bridge engage completely at play (pressure roller in contact with capstan etc.)?

Martin

Martin, what about the Hall Element (12IC14)?  If that device failed or one of its connections opened up the Beocord would not sense any tape reel movement right?  Would that cause the Beocord computer to stop any play or forward/rewind activity?

John

It would.
But if no pulses are coming from the hall element, the deck would usually go on for about half a second or so, enough to
see the take-up reel rotate, which it apparently doesn't in this case.
But of course a check of the hall signal would be a good idea.
There could also be more than one fault.
Perhaps something with the solenoid hold function.

Martin

This could be the case - the take-up reel does rotate app. ½ sec.

I will check it later today.

/jesper

Now it rotates. When I asked the first time, it didn't... 

Martin

Well, yes and no, it doesn't rotate - but it moves 😳

anyway I'll check tomorrow and return -right now my brain is melting .....

/jesper

Well, I've checked the the Hall and even changed it -not an easy task 😁 (bear in mind I'm a IT and Radiation engineer -not Mechanical 😕 )

But I got it assembled again and..., same sh**, it does how ever rotate one full turn when pressing FF or REW.

I'm so close to say "If someone wants it, you can find it in the Harbour 😜 "

You said earlier that you have more than one of the Beocord mechanical assemblies, right? Those are complete assemblies? With the assemblies removed can you operate (by hand) the reels and check that they turn easily? You also checked the Hall device wiring from the mechanical assembly to the board, right?

I have 2 other identical assemblies and all 3 have the same behavior.

The only difference between them are that the original has an blue marker "A" on the motor and the others have an "E"

I have checked all solderings and wirings and they all move freely.