BG4002 PCB adapter for reservoir capacitors

BG4002 PCB adapter for reservoir capacitors

I am currently restoring a BeoGram 4002 type 5513, and even though the reservoir capacitors usually are within specifications, I replace them to avoid impending issues. 

The setup in the 5513 is relatively unique since it consists of a dual capacitor with values of 1000uF & 4000uF. The 1000uF is meant for the CD4 modulator, and the 4000uF is intended for the mainboard. The dual capacitor is no longer available, so I usually print a 3D adapter to hold two new capacitors of 1000Uf and 4700uF, respectively.
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I am not keen on directly soldering all these dangling wires to the capacitor feet, so to further optimise the installation, I created a PCB with some advantages over the original setup. 

  • To ease the installation, the PCB comes with wire markings.
  • A bleeder resistor is part of the circuit. The resistor slowly discharges the capacitors when the BeoGram is unplugged.
  • An LED gives visual feedback on when the BeoGram is turned on and when the capacitors are discharged, making the BeoGram safe to work with.
  • It uses the original holder for the capacitor, removing the need for a 3D-printed adapter. The 1000uF capacitor rests on the bottom of the cabinet.


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Related PCB

Reservoir PCB

Reservoir PCB