To ensure stability after restoring Beograms, I like to test them thoroughly. While playing records on a recently revived Beogram 4000, the sensor arm’s light bulb burned out. This presented a chance to modify my LED assembly design, previously used for the Beogram 4002, to fit the Beogram 4000.

The redesigned Kapton flex board can be folded to fit the sensor arm bulb cavity:

A 3D-printed wedge, attached to the back, positions the LED for optimal light reflection into the arm’s sensor. Its thin leads are threaded through slots in the bulb cabinet:

These leads are soldered to the same pads as the original bulb:

Here it is illuminated:

The ultra-warm white CREE LED provides a warm red glow to the B&O logo, mimicking the original incandescent bulb. Like all Beolover components, this LED replacement is available to fellow enthusiasts. Contact me via email or the contact form if you need one for your Beogram 4000 restoration project.

Any light source in the sensor arm must generate the correct signal at TR14’s collector to activate the record detection circuitry. The Beolover LED replacement achieves this flawlessly:

For reference, here are images of the sensor arm PCB wiring, in case of issues such as broken leads when removing the bulb housing:

This Beogram is shown in operation with the LED replacement:

The record playing is ‘Latin for Lovers’ by Cal Tjader on the Fantasy label (8016), pressed on unique red vinyl. I recently discovered this gem at “End of an Ear,” a record store in Austin, TX. It’s fantastic to witness the resurgence of vinyl records and record stores.