Hi all!

After replacing the belts (thanks martin) in a beocord 2000 that has stood still for a long time  Things got really weird: it won't play a casette in a normal way.

Forward it plays, sound is all messed up, going too fast-too-slow-too-fast-too-slow etcetera. Like a sinusoid. rewind and forward works, but probably not how it should.

It can not play the other side of the tape, it will move the heads to the tape but click to stop immediatly. Forward and rewind won't work either.

What can be the problem?!?

Hope to find some help here.

Thanks!

Are you sure you have installed the belts correctly? It's not quite easy to get it right if there is no reference.

There are two belts from the motor and one of them (smaller one, I think) goes somewhere like in the drawing attached.

(There WAS a photo of the setup in here: http://forum.beoworld.org/forums/t/11997.aspx and here: http://forum.beoworld.org/forums/t/20129.aspx but as the forum update the pictures are missing. I have a BC2000 but can't get a picture of it now). 

This is how i've done it, think it is correct because the music on the tape was recognisable... just all messed up.

Hope the picture is clear enough!

I oiled all rotating things I could reach, didn't help a bit.

I found something about black capacitors going bad causing this kind of trouble, Dillen should know which one... maybe he can point me in the right direction?

Lausvi, thanks for your reply!

Premiumverum:

This is how i've done it, think it is correct because the music on the tape was recognisable... just all messed up.

Hope the picture is clear enough!

Lausvi, thanks for your reply!

You are welcome!

The picture of yours is much better than mine, I made it using PowerPoint....  

Unfortunately I can't give you any better tips just now, the belt thing was the first thing that I thought of. I got my BC2000 from a friend who sells vintage audio. He had got the BC as non working and he asked if I'd like to have it for 20 EUR. At home I found that somebody had tried to replace the belts with bad rubber belts and the smaller one was fitted incorrectly and that was the reason for not working. Belts from Dillen, then I had some troubles with the speed control, and now I am waiting for a replacement motor from Dillen.

I hope Dillen will come to this thread soo and tell you what is the matter!

Sorry for asking but did you try a different tape ?

If the old belts were blocking the motor, there's a good chance that something in the power supply
suffered an overload. Check resistor R8 at the main board near the voltage regulators on the rear cooling fin,
it's mounted vertically.
Regarding capacitors, they can never be ruled out and a cap kit is available (also containing resistor R8)
but a complete kit would maybe be a little overkill for your deck.

I like to replace the two black electrolytic ones on the top (dolby) board as a minimum.
They are both 220uF and always bad, mount good 220uF 25V caps instead.
They have nothing to do with the motor power though.

Martin

Hi there,

Long time back but I finally got round to changing the two black caps and R8: nothing helped. What should I do  next?

Deck won't even play now, it tries to play, then clicks back to 'stop'.

Does both reels rotate when it tries to play ?
Is the belt for the motion sensor mounted correctly (the small belt on top of the deck), running from
the right reel table to the motion sensor wheel ?

Martin 

Without a tape, one reel rotates (the right one when looking from above).

The motion sensor wheel is connected to this wheel, O-shaped, not like an 8.

With a tape loaded, it will not start. It pulls the tape tight, but won't start running.

When I move the tape by hand by rotating the motion sensor wheel it stays in 'play' mode, until I stop rotating it, then it will click back to 'stop'.

The return button works fine, when spooling forward it makes a scratchy, squeeky noise .

I'm puzzled! Thanks for the help

Check the spring function of the part of the right tape spindle that grips into the tape reel. The triangular part
should move freely up and down the spindle with a spring function to keep it up. It has rounded corners to assist
it in locating a correct position for gripping into the tape reel as it rotates. The left one is obviously working so
compare the right one to that.

Martin

The triangular part moves freely up and down the spindle, and the spring mechanism is fine.

When I load a tape, nothing happens to it (tape does not push the triangular part down or something), I suppose this is normal?

I have had the spindles apart to lubricate the moving parts, nothing seemed wrong...

PS: while at first when playing without a tape the motion sensor wheel obviously moved with little 'shocks' (as described in first post, the sinusoid thing) it now runs smoothly. It appears replacing the resistor solved part of the problem.

PPS: the motion sensor wheel can move up and down. Is this normal? When I push the motion sensor wheel down, the machine does play, although very slowly and not at constant speed. Can the trouble be in the motion sensor?

PPPS: It's odd, but it looks as though the machine doesn't have the power to move the tape when in play mode.

Everything works fine, rewind, forward, except for record and play....

Well, it's one of those cases that I would have loved having on the bench.
Check power supply voltages.
Check voltage regulators for cracked solders.

The Beocord 2000 is not the most complicated of machines, but you can still put it together the wrong way.
If you dismounted the reel tables, make sure you got all mechanical parts, brakes, clutches etc correctly back on.

Martin

Dillen:

Well, it's one of those cases that I would have loved having on the bench.

The motor gets 14,6 volts, soldering seems fine.

Wouldn't adjusting the torque (see page 5-2 of the manual) be a solution? Look at the problem as if it were a car, when empty the torque is big enough to get it rolling, but when the car is loaded full (with B&O machines of course!) the torque is not big enough to get the car moving, and it stalls every time you try to drive away.

I already put the torque one step higher (brass ring towards C) but it did not help. Should I move it to the 4rth, highest position or am I thinking in a totally wrong way here (or should I turn it down?)?

By the way, Martin, if this gets too complicated you can have the machine if you like, it is taking up all the time I should put into my studies and I don't even have a real use for a tape deck!