Following the replacement of the reservoir and motor capacitors on the Beogram 4000, the next stage was to focus on the main and power supply PCBs. It’s recommended to replace the RPM relay and trimmers alongside the electrolytic capacitors due to their susceptibility to corrosion.

The main PCB in its original state can be seen here:

A closer look at the outdated Siemens relay and RPM trimmers:

And the outcome after component replacement:

The Beolover replacement relay offers a direct replacement, sharing the same footprint as the original Siemens design, which was non-standard:

It utilizes a contemporary encapsulated relay, boasting a lifespan exceeding 2 million switch cycles before failure, ensuring its endurance for numerous extended vinyl listening experiences.

The final task involved replacing the two tantalum capacitors on the power supply board. This image showcases the original board:

The two brown and white components on the right are the 1uF capacitors requiring replacement:

With this, the electronic restoration is complete. The next phase is to rebuild the motor.