Help needed, Beogram 6006

[YannChris]

Hello Beoworlders,

The belt of the arm carriage of my Beogram 6006 (type 5625, 1984,  with linear motor) was broken and I replaced it.

Unfortunately, the detection arm was damaged during the disassembly  and I had to fix it by gluing the plastic holder where the arm is screwed on the carriage.

I managed to have it horizontal.

Now, when I play a record, the carriage moves to the beginning of the record (it also makes a complete cycle with speed change if no record is present) and the stylus descends. So it seems that the detection system is OK.

But when the disc reading starts, the arm does not move and the stylus jumps as if with a scratched disc (see attahed video). Same problem if I move the arm in the middle of the record.

What could it be and what can I check?

Thanks by advance,

Yann.

• This topic was modified 3 weeks, 1 day ago by YannChris.
• This topic was modified 3 weeks, 1 day ago by YannChris.
• This topic was modified 3 weeks, 1 day ago by YannChris.
• This topic was modified 2 weeks, 5 days ago by YannChris.

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Location: Brittany, France
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[YannChris]

A little up.

I tried to adjust the tracking arm’s height at 19,5mm as explained in the service manual.

I noticed that a small tap on the tracking arm starts the playback, as if there is a focus issue with the sensor.

What could I do to go further?

Kind regards,

Yann.

Location: Brittany, France
My B&O Icons:

[Mark-sf]

It appears that the arm is being blocked from moving inward once it lowers. I would check with it open and lowering the arm to the right of the platter. It should move freely the 1/2 inch to the sensor arm. Sometimes the optical shutter is sticking or has be rotated so it hits its stop prematurely.

[YannChris]

Hi Mark,

Thanks for your reply.

I’ve ordered a new belt from Beoparts and await for it.

I’ll take back the TT to the bench when I’ll recieve it and let you know.

Kind regards,

Yann.

Location: Brittany, France
My B&O Icons:

[YannChris]

Hi,

Attached a new video with the issue and what happens when I tap slightly the chassis.

You can also note the carriage motor on the right of the video.

It stops moving at 13′ of the video and goes back after the tap. First rather fast, then by steps following the move of the reading arm.

Same issue with my 3 cartidges, so I doubt that the stylus are involved.

Tracking arm set at 19,5 mm from the aluminium part of the platter and tracking weight at 1,2 g.

So I wonder if something is mis-aligned in the carriage, but I don’t know how to remove it from the rails and would avoid to break anything.

May someone explain the process?

Kind regards,

Yann.

 

 

• This reply was modified 1 week, 5 days ago by YannChris.

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Location: Brittany, France
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[Mark-sf]

You need to adjust the aperture (B) so that the arm moves every 2 revolutions. Make sure that stray light does not leak in when doing it.

[YannChris]

Thank you Mark,

I’ll try to make the adjustment, it seems to be rather tricky.

 

Location: Brittany, France
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