The final stage of restoring the Beogram 4002 (5503) involved balancing the sub-chassis, setting the correct platter height, and adjusting the tonearm. To ensure the best range of motion, the sub-chassis must be carefully positioned between the transport lock clamps. The platter height and vertical alignment need to be set so that the platter sits level with the Beogram’s aluminum covers. This allows for the arm’s lowering limit to be established and the tracking weight to be calibrated against the adjustment dial located on the arm weight housing.

Here’s an image showcasing the platter after these adjustments, illustrating its centered and flush position within the aluminum plate:

The arm lowering mechanism was fine-tuned so that the stylus narrowly clears the platter’s ribs. This is a crucial safeguard for the cartridge. If the arm is unintentionally lowered without a record on the platter, this adjustment, coupled with the sensor, will prevent damage.

To enhance stability, the original, somewhat fragile circlip securing the counterweight adjustment screw was replaced with a more durable nut. This guarantees that the tracking force calibration remains accurate, even after the unit has been transported.

Below is the counterweight setup in its original form:

And here it is with the newly installed M3 nut:

Finally, the arm was balanced:

For those interested in carrying out these adjustments on their own Beogram, there are video resources available. My YouTube channel provides guidance on adjusting the platter bearing (referencing the Beogram 4000, which shares a similar process) and calibrating the tracking force. Additionally, there’s a video demonstrating the adjustment of lowering limits.

With the mechanical aspects complete, the next phase focuses on the restoration of the electronic components.