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Beolover SyncDrive: DC Platter Motor Replacement for Beogram 4002 and 4004 (Type 551x and 552x)

Late Beogram 4002 and the 4004 (Types 551x and 552x), which have DC platter motors instead of the earlier synchronous AC motors usually suff...

Thursday, October 8, 2015

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!


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