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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, July 19, 2018

Beomaster 4400 (2419): Reservoir Capacitor Replacement and Transistors Remounted

Last night I installed the two new 0C8 & 0C9 10KuF reservoir capacitors. These are the capacitors for the Beomaster ±35V rail voltages.

The replacement capacitors are a little smaller in diameter and length but I found some 105°C Nichicon capacitors that still fit into the Beomaster 4400 mounting bracket.

I reattached the ±35V rail voltage wires using some small terminals.






















I added some heat shrink tubing for some added protection.






















Here is the completed reinstallation of the reservoir capacitors.






















Now I was able to resecure the main (PC5) board in the cabinet. I am using SilPads for the insulators and thermal exchange between the power transistors and the heat sinks.




































































This Beomaster is now ready for the reinstallation of the small boards.




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