Hi Per,
Yes, my method is to re-center the tracking sensor control where it is as close to the ideal position and all of the adjustment screws are at their centered positions (so they have room for adjusting).
link of mine on the Beoworld Workbench Forum that shows the components involved. A repost of one of the photos is here (please excuse that I mispelled "diaphragm" in the picture :-) ).
I begin these adjustments with the platter removed.
A first thing to try is to just see how much out of position the tracking sensor is.
You might get lucky and all it needs is a quick adjustment of diaphragm eccentric adjustment screw (B).
First loosen the locking screw (C). Then see if you can turn screw (B) such that the arm does not advance by itself when lowered.
Screw (B) has limited range so if you rotate it to where it stops (DO NOT OVER TORQUE IT) and the tonearm tracking still advances the arm by itself then you will have to move to a more in depth resetting of the tracking sensor assembly.
Hopefully your Beogram only needs a little adjustment of screw (B). Perhaps screw (C) had come loose.
If the quick adjustment of screw (B) could not solve the problem then it is likely that your Beogram shipping incident caused the diaphragm to shift where it mounts onto the tonearm base. That means you will have to reset the diaphragm position on the base first.
My method for this case is to loosen the diaphragm height adjustment screw (A). The height of the diaphragm is shown in the service manual but there is also a left and right rotation of the diaphragm that defines where slit in the diaphragm rests over the tracking sensor (inside the black box).
In addition to screw (A) I loosen locking screw (C) then rotate the eccentric adjustment screw (B) where it is centered...meaning I can rotate it left or right if I need to later.
With those initial adjustments made I slowly and carefully try to adjust the diaphragm by pivoting it until I have the tracking sensitivity almost where it needs to be (per the service manual). Note that pivoting (rotating) the diaphragm means that you also need to be aware that the diaphragm height doesn't get off where it needs to be.
So the process is with the Beogram 4000 platter removed, make an adjustment, press the ON button and let the arm move and lower...check to see how sensitive the tracking is. I consider the initial position good when the arm lowers, the arm does not advance on its own but I can get it to move with a light nudge to the side of the tonearm. When that point is reached I gently tighten screw (A) being careful that the diaphram position does not change as I tighten the screw.
Now the tracking should be at the starting position I like it to be for the final tracking adjustment as spelled out in the service manual.
That is where you put the platter back on the Beogram but do not install the platter belt.
You are going to rotate the platter by hand.
A record is placed on the platter (the service manual calls for a B&O test record that I have never been able to find).
The Beogram is turned on and you scan the tonearm forward to the middle area of the record.
When the arm lowers onto the record it will just sit in the selected groove.
Manually rotate the platter and observe how many revolutions of the platter before the Beogram servo motor begins to advance the arm.
It should being within two revolutions then advance the arm every revolution after that.
If the servo does not advance then this is where you begin to use the diaphragm eccentric adjustment screw (B) to fine tune tracking sensitivity.
Screw (B) has a limited range of adjustment left and right. That is why it is important to have screw (B) in a centered starting position so you have room to make the fine adjustment.
Once the tracking sensitivity is correct you gently tighten the adjustment locking screw (C). Later you can apply a dab of removable glue to screw (C) so it can't easily come loose. However, I recommend you not do that until you have tested record playing on the Beogram for a while.
As on the other adjustments, be patient and take your time.
-sonavor
