Beogram 4002 (5513): Adjusting the Floating Chassis Height

Once the main platter bearing is adjusted in a Beogram 4002 (5513), the floating chassis height needs to be set in a way that the aluminum surface of the platter is flush with the surrounding aluminum panels. This adjustment is done by turning the nuts that define the height of the leaf springs that keep the chassis suspended for vibration insulation. This is best done with a 8 mm hex wrench bit:

Simply turn it CW to lift the chassis or CCW to lower it. This needs to be done repeatedly for all three of the springs until the platter is flush with the aluminum panels all around. I recently made a video that shows this process on a Beogram 4000. The difference here is that the 4002/4004 models do not have a counter nut, i.e.one should put a dab of paint on the nuts to lock them in place once the adjustment is satisfactory. If the platter is not centered in the aluminum panel (do this with the belt in place) then the position of the chassis can be set by bending the threaded rods on which the nuts sit. This is a bit a dicey operation where some relatively brute force needs to be applied with high precision. Nothing for the faint of heart!

This shows the end result. The platter is fully flush and looks just gorgeous!:

Here another angle showing off the lovely restored keypad:

Aren't they beautiful, these babies?? This is Beolove!

Beogram 4000: Adjusting the Platter and the Chassis

After performing all necessary restoration tasks on the Beogram 4000 that I restored during the last few weeks, I put the aluminum panels back on. I quickly realized that the platter was not flush nor centered relative to the surrounding aluminum panel. This meant I needed to adjust the chassis and platter positions. The service manual prescribes to adjust the platter first relative to the chassis, and then adjust the chassis poison relative to the enclosure, i.e. the aluminum platter surrounding the platter to create a situation where the platter is flush with the panel and also centered in the opening. In other words the task was to achieve a Beoloving situation where the Beogram looked just perfect!

I made two short videos describing the the process. Here is the first one, that describes how to adjust the platter relative to the chassis:

After the platter is adjusted the chassis can be aligned. This procedure is shown in the second video:

Well, this pretty much concludes the restoration process. I am almost sad, since I really got used to this most beautiful piece of engineering, and I will have a hard time to let this Beogram 4000 go back to its owner! I am grateful to Jacob Jensen for coming up with such wonderful designs. They enrich my life and they also got me turned on to electronics. It has been a wonderful experience the last few years! Of course I never met him, but it feels like I just lost a friend! Rest In Peace! It is Beolove!