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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...

Sunday, March 3, 2024

Beogram 5500 Type 5943: As Received

 I recently opened up and examined a Beogram 5500 turntable audio component that goes with this Beomaster 5500 restoration I did earlier.

This Beogram 5500 does not function and appears to be dead.





























Opening it into the service position I immediately saw a problem with the tangential arm assembly drive...the drive string was not connected.
























































Both ends of the drive string are disconnected and a bit tangled.





























After sorting the drive string out and began to re-install it, I discovered a problem with the common mounting post for the two ends (Point H in the service manual diagram).













































Mounting post "H" is missing.





























It might be possible to make some sort of replacement but I do happen to have a parts unit Beogram 3000 Type 5903. It is in really bad shape and beyond restoration consideration. However, its internal parts are in good shape.

Bang & Olufsen used this same internal Beogram assembly on quite a number of their tangential turntables (including the Beogram 3000 and 5500).  I should be able take the white, plastic tangential arm assembly chassis (1106) from the Beogram 3000 and use it in the Beogram 5500.

Here is a photo of the Beogram 3000 arm drive mount on its 1106 chassis.
It clearly shows the missing mounting post "H".





























On a positive note, I discovered this Beogram 5500 has a blown main fuse.
Replacing it got the turntable to turn on again and its motors run.

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