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Excerpts from the passing week

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Dillen
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Dillen posted on Sun, Sep 22 2019 3:00 PM

"Hi Martin,
I bought belts from Portugal, my Beocord 5000 worked fine for a few hours, now it stops intermittently and it seems to get worse and worse."

"Hi Martin, Can you help me? I fitted new belts in my Beogram 5005, got them off Ebay from a seller in Portugal. The platter motor emits an annoying screeching sound that wasn't there before. Did I do something wrong?"

"Hi Martin,
I recently was lucky and got myself a mint condition Beocord 2000 cassettedeck, I got it cheap because it was in need of new belts and a cleaning.
Now it runs but with with a huge amount of wow, I can actually see the tape spools speed up and slow down with the naked eye. The cooling fin at the back gets very warm, is this normal?
Can't be the belts, I think. They are all new from Portugal. If I send it over to you would you care to take a look at it?"

"Hi Martin,
Not sure, if you can help me.
I bought new belts for my Beogram 3300 on Ebay. It ran fine for a couple of days, now it won't start at all.
I can see the motor tries to rotate, but it seems to be locked. The motor pulley wiggles back and forth when I push it manually and it can only be rotated in the most upright position. I think this is wrong?"
Me: "Let me take a wild guess - you bought from a seller in Portugal?"
Owner: "Yes, - do you know him?"
Me: "Sort of..."

It's a free world. The belts are comfortably cheap and unfortunately also plentyful, it seems,
- but my heart cries.

Martin

Answered (Verified) Verified Answer

Dillen
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Answered (Verified) Dillen replied on Sat, Oct 12 2019 8:21 PM
Verified by Peter

This weeks result;

- 2 motors for Beocord 6000/8000 series, plus a capstan bearing.
- 1 motor for Beocord 5000 (plus a bit of power supply repair sent to me)
- 2 motors for Beogram 59xx (3500/4500 etc.) series (I only had one, so unfortunately I couldn't help the other owner right now)
- 1 motor for Beosound Ouverture
Plus three or four others that I couldn't help, because I am running out of motors.

Things are going REALLY fast downhill.
The belts look about right but are WAY wrong when it comes to elasticity.
You can easily tell the difference in the belts, if you compare to the original.
They are typically far too tight, putting a far too high sideways load on the delicate sinter-bronze bearings in the motors.
The bearing material is so delicate, you can scratch it with a nail, but because of the way it runs (no bearing/spindle metal contact) it will easily last a century or more if treated correctly.
The bearings are simply ground away, The spindle hole is opened to an oval shape.
The problem was always the same with the cheap (asian and german) standard "toy-" belts, and I've mentioned in dozens of times, but they are now being spread out tsunami-wise on Ebay listed as suitable for B&O, - and B&O units are dying like never before.

In the best of cases the deck simply fails to function.
If the protection system (Beocord 5000 etc.) doesn't kick in right away the deck will typically run for a few weeks.
Then it will start to whine or screech (goodbye motor bearings), the safety circuits (if any) will kick in and the deck will grind to a halt.
For some decks this halt will be permanent, - and if not, requiring at least a replacement motor (and a set of correct belts), but often also a couple of electronic repairs.
For Beocord 5000 a brief puff of smoke will be seen from the power supply at the rear of the Beocord as the 10 Ohm safety resistor burns.
In Beocord 2000 it will be the 4,7 Ohms resistor in the regulator circuit near the cooling fins.
Etc..

My heart cries.

Martin

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GaSelle
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For my first Beosystem 5000 I bought belts from the bespoken seller for the Beogram 5000, Beocord 5000 and Beogram CD50. They are all still operating. 

But this time, for the second system, I ordered belts from you instead. It´s not even that much more, than from the seller in Portugal. It must be lack of knowledge, that people are buying them of Ebay. It was for me; I´ve learned since.

Dillen
Top 10 Contributor
Copenhagen / Denmark
10,977 Posts
OFFLINE
Founder
Moderator
Answered (Verified) Dillen replied on Sat, Oct 12 2019 8:21 PM
Verified by Peter

This weeks result;

- 2 motors for Beocord 6000/8000 series, plus a capstan bearing.
- 1 motor for Beocord 5000 (plus a bit of power supply repair sent to me)
- 2 motors for Beogram 59xx (3500/4500 etc.) series (I only had one, so unfortunately I couldn't help the other owner right now)
- 1 motor for Beosound Ouverture
Plus three or four others that I couldn't help, because I am running out of motors.

Things are going REALLY fast downhill.
The belts look about right but are WAY wrong when it comes to elasticity.
You can easily tell the difference in the belts, if you compare to the original.
They are typically far too tight, putting a far too high sideways load on the delicate sinter-bronze bearings in the motors.
The bearing material is so delicate, you can scratch it with a nail, but because of the way it runs (no bearing/spindle metal contact) it will easily last a century or more if treated correctly.
The bearings are simply ground away, The spindle hole is opened to an oval shape.
The problem was always the same with the cheap (asian and german) standard "toy-" belts, and I've mentioned in dozens of times, but they are now being spread out tsunami-wise on Ebay listed as suitable for B&O, - and B&O units are dying like never before.

In the best of cases the deck simply fails to function.
If the protection system (Beocord 5000 etc.) doesn't kick in right away the deck will typically run for a few weeks.
Then it will start to whine or screech (goodbye motor bearings), the safety circuits (if any) will kick in and the deck will grind to a halt.
For some decks this halt will be permanent, - and if not, requiring at least a replacement motor (and a set of correct belts), but often also a couple of electronic repairs.
For Beocord 5000 a brief puff of smoke will be seen from the power supply at the rear of the Beocord as the 10 Ohm safety resistor burns.
In Beocord 2000 it will be the 4,7 Ohms resistor in the regulator circuit near the cooling fins.
Etc..

My heart cries.

Martin

Peter
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Earsdon
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Peter replied on Sat, Oct 12 2019 9:19 PM

I would pin this to the top of the forum - one would not buy cheap tyres for a Bentley, why buy cheap fake parts for B&O?

Peter

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