[Dillen]

Nice work.
And next the grey ones in the amplifier stages.
And – remember – no low-ESR capacitors in these circuits!

Martin

[Dillen]

Have you checked the backup battery?

Martin

[Dillen]

Glitch wrote:

Matching the veneer across the top of both pieces was a nice touch.

Well spotted. 🙂

Martin

[Dillen]

Have you checked if the lower glass panel has come lose?
If the glass comes away from its plastic holders, the conductive rubber bumpers will no longer
have contact.
It can also happen, if the glass was fastened using very thick tape.

Martin

[Dillen]

-Ripple on supply to the processor.
-Bad reset circuit.
-Bad processor.
In that order.

Martin

[Dillen]

Losen the three transport screws. They are found under the platter.
With the transport screws tightened for transport the belt will almost always come off when the motor is started.
The same goes for Beogram 1203, Beogram 2000, Beogram 3000.

Martin

[Dillen]

The wooden trim strips are to narrow to really make Zebrano look any good on a BG8000, I think.
I did a Beosystem 1700 in Zebrano many years ago.
To this day I am not sure if I really like it – or even if I actually liked it back then. But the original veneer was too far gone,
so something had to be done, and I was keen on trying.

Martin

[Dillen]

I don’t think I have any of them at present, but it would perhaps be helpful, if you could tell the type of
the single original woofer you have, so they can be matched.

VIFA M25WN-40
SEAS 25 F-EWR
SEAS 25 F-EW

Martin

[Dillen]

And a Beogram 4000C with several defects.
Impressive.

Martin

[Dillen]

Have you tried it with a record on the platter?
With no record it will only spin briefly – while the record sensing system operates.

The light staying on at all times could be as simple as a shorted transistor.
A bad batch of BC337 was used in production, so it’s not uncommon to see some fail.

Martin

[Dillen]

Typical symptom of a slipping belt.
With the Beogram unpowered and platter lifted off, put a finger on top of the
motor pulley, rotate the subplatter (“skeleton” platter) by hand and feel for friction.
There should be a fair amount of friction. If the belt doesn’t “bite” the pulley but instead just
“skates” on it, replace the belt.

Yes, Danish Sound Parts is both Danish, Parts and Sound.

Martin

[Dillen]

The crossover can not introduce a signal. It’s all passive.
All sounds come from the amp.

But it could be, that the diaphragm wasn’t properly centered, so it now rubs on the magnet or center pole piece.

Martin

[Dillen]

When the problem was with the string drive, it’s much more likely that the offset is
between the carriage and the string rather than between parts of the mechanics.
Adjust the black excentric at the foot of the carriage.

Martin

[Dillen]

Not sure if this is what you are doing, but NEVER run these decks without the subplatter and platter!

Martin

[Dillen]

Beomaster 4400 rosewood.
Mint condition.
Completely restored.
Not cheap.
PM me if you are seriously interested.

Martin

[Dillen]

Perhaps the spindle hole in the large pulley is worn out of shape from using a wrong belt (too tight)?

Martin

[Dillen]

A wrong belt can indeed mess things up. And it can even damage the delicate sinter bronze motor bearings.
It’s impossible to say if what they sell will work. I have seen countless wrong belts sold everywhere.
Correct belts are available from Danish Sound Parts – also the wedge-shaped one for the carriage motor.

Martin

[Dillen]

Available in polycarbonate, injection molded :
https://www.dksoundparts.com/product/beocenter-5000-7000-7002-spring-holder-for-turntable-dust-cover/

Martin

[Dillen]

Stay with the original and have them refoamed.
They are unique for these models.
6,4 Ohms if I remember correctly.

Size is not everything when it comes to speaker drivers. Look at the list of T/S parameters.

Martin

[Dillen]

There should be no nylon washer – but in some Beocords you will find a bronze spring plate.
Does the large pulley wiggle on the metal spindle?
Has the thread on the spindle been damaged?

Martin

[Author]

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