Replacing the light bulb tracking sensor on the BG4002

As usual, when repairing the Beogram 4002 I'm replacing the light bulb associated with the tracking sensor. The old light bulb is old and prone to failure. Furthermore, it's glued to the housing and, therefore, hard to replace. To ensure this won't be the point of failure in the future, I've created a replacement PCB which will hold an LED and trimmer, just like Menahem and Rudy (beolover).

On the back of the PCB, I've added a trimmer to adjust the intensity of the LED. This way, it's super easy to adjust the sensitivity and make sure it works just like the original. I've used a Vishay T93, 5kΩ variable resistor, and a Vishay 500mW standard LED in series with a standard 2.5kΩ resistor.

I've also 3D printed a cover that will help the PCB stay in place and remove unnecessary light from external sources. Below are some pictures of the PCB and the finished product.

Update, October 2022:
Just finished another iteration with an updated PCB design with SMD components.

Update Oct 2025:

A new version featuring a ground plane and an updated 3D model is now available. See more here.

Related PCB

Light Bulb Tracking Sensor Replacement