Help with a Beocenter 4600 turntable

8 replies
NO
Offline
notwist
Bronze
Posted October 4, 2021 at 12:25 GMT
#2256952

Hi all, 

I rescued a Beocenter 4600 from oblivion. The chassis is in excellent condition, almost totally free of scratches. But it was in a sorry technical condition. All buttons were seized, the cassettedeck had died and the amplifier was busted with some actual fire damage. Over the past year i've been working on it as a side project; when I had some spare time I would do work on it. Right now everything is working but the damn turntable. 

When i press the 33 or 45 button it will start. As soon as I let go of the button, it will stop. Sometimes it will start moving and sometimes it won't do anything, very intermittent. In one or two cases it actually started up and then played in 45 (way too fast). But I was unable to get it to go to 33 rpm not to make it stop. 

I inspected the board underneath the turntable and replaced the small caps on there. No change. I cleaned and burnished all contacts from the two small relays, no change. The TIP transistors seems to be OK. 

My suspicion is that this is a mechanical issue but for the love of me I can't find any details on this turntable. So I can't see if something obvious is out of alignment or otherwise wrong. It all seems to turn well and seems to be connected in the correct way. 

I am hoping someone can help me, it's the last stretch to renovate this machine, would be a shame to have it end here :-( 

Bert

NO
Offline
notwist
Bronze
Posted October 4, 2021 at 12:32 GMT
#2256953

I forgot to add some images of the turntable :-). 

Bert

PR
Offline
ProGram
BronzeFounder
Posted October 5, 2021 at 11:36 GMT
#2256954
The switch (2. Picture) should be closed in this position. The red arm of the switch is pushed by the white plastic lever when shut off.
O(
Offline
Ottilie (archived2)
Bronze
Posted October 5, 2021 at 12:32 GMT
#2256955

recently bought my first B&O.

 

 everythings working fine except when the arm returns across the record to the starting point it scratches across the surface of the record. Ive tried it on every counterweight setting from 0 to 2 and it still doesnt lift the stylus high enough to make it across the record without scratching it.

 

 Any ideas?

NO
Offline
notwist
Bronze
Posted October 5, 2021 at 13:47 GMT
#2256956

Good afternoon, 

thanks for the clue about the switch, but I am not 100% sure what I should do about this. I am hesitant to turn or pull on the turntable components (this being B&O which like to go *crack*). Can you tell me what I should do to get it in the right position? 

Thank you very much! 

Bert

NO
Offline
notwist
Bronze
Posted October 5, 2021 at 13:49 GMT
#2256957

**** recently bought my first B&O.****

That is a completely different problem, you should post a new thread. 
Hijacking other threads is not considered good form :-)

PR
Offline
ProGram
BronzeFounder
Posted October 6, 2021 at 08:18 GMT
#2256958
Just bent the longer part with a pliers as much as the one side pushes the other and the white lever can separate them.
NO
Offline
notwist
Bronze
Posted October 7, 2021 at 20:02 GMT
#2256959

Thanks! After some trial and error that indeed seems to do the trick :-). 

My humble thanks again, this kind of thing is completely unfindable unless you know it. 

Many regards, 

Bert

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