[Mark-sf]

You really need to take a look at the service manual in the section that discusses the adjustment of the magnet coil. That is where I would start before investigating failing parts. Rudy’s Beolover site also has a complete 4000 restoration that covers that area well: https://beolover.blogspot.com/2024/02/beogram-4000-full-functional-restoration.html.

[Mark-sf]

No you access it by removing the bottom cover.

[Mark-sf]

There is a sliding shorting switch near the base of the tonearm that is activated when the arm rotates to unshort the + and – leads of each channel.

[Mark-sf]

The issue they are trying to address, is that when the weight is removed, the suspension will be higher on that side and the tonearm will show a great distance from the surface. Simply adjust and place it in but not fully seated so that you can check the height.

[Mark-sf]

No, its L-, L+, R+, R- .

[Mark-sf]

Grab the edge to the silver plate on the rear of the tone arm and lift it out. It fits using friction.

[Mark-sf]

Since the turntable is supposed to be muted at that point, this is a grounding problem. First, I would move the arm over and cue it down before the edge of the record to see if the sound changes when it unmutes. I will bet it does. If so, then your 3rd party DIN cable does not have the ground wire connected properly. It needs to connect only to the DIN connector sleeve. If it is connected properly, then the issue may be on the connector board in the turntable.

• This reply was modified 2 months, 3 weeks ago by Mark-sf.

[Mark-sf]

I’m sorry but there was to much traffic noise in your video to zero in the noise you are referring to. What component are you connecting it to and specifically what cable are you using? If you are not using a DIN to DIN cable are you connecting the phono ground wire?

[Mark-sf]

You have pictures so as long as you don’t break tabs you should be fine.

[Mark-sf]

My approach would be to start disassembling the mechanism to determine when it frees up.

[Mark-sf]

This is very hard to triage remotely. Are you saying that if you attempt the “In/Out travel of the pickup arm” instructions that cam wheel Z (1604) does not rotate? Is Swingring Y frozen as well?

[Mark-sf]

Lift the silver counterweight out of the arm and you will see it.

[Mark-sf]

You are going to need a male din to female rca phono adapter and then connect the TX ground wire to a screw on the 1900.

[Mark-sf]

It’s possible that the cord and spring that causes the arm to move laterally has become disconnected or broken. You will need to open it up to examine,

[Mark-sf]

If you remove the counterweight you will see a screw that adjusts the tonearm height when it is cued up. This should be 5mm above the record surface.

[Mark-sf]

Nope, the bounce is intentional to prevent acoustic feedback. Enjoy your new purchase!

[Mark-sf]

Your cropped closeup had me confused as to where the failure was. It is actually the hinge base not the hinge which has lost its screw. My recommendation would be to epoxy a nut (or if not wide enough add a washer)  to the underside from which a screw from the top can thread.

[Mark-sf]

Did the plastic break off from the lid or the rear where the hinge attaches? Can neither screw attach? Best would be to upload a picture

[Mark-sf]

If you are stating that you have 3 RCA plugs and one just has a ground wire, then you can simply snip it off, strip it and either add a spade lug or attach it directly to your Denton. If this is not what you have please provide a picture.

[Mark-sf]

Welcome back. I’m not sure I understand you issue from your description. Are you say that when you press start the arm moves to the record edge, lowers then comes up and lowers again? Or is it doing something else? When it drops again is the solenoid actuating again? Perhaps you can upload a video.

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