To complete the remaining service manual adjustments, the platter motor connector needs to be disconnected for both the tracking force and tracking sensor adjustments.

To adjust the tracking force, an MMC phono cartridge is required, and it’s recommended to set the sliding tracking force knob to 1 gram.

With the platter motor disconnected, the tonearm can be placed over the stationary platter. A tracking force scale is used to measure the cartridge’s tracking force, aiming for a reading of 1 gram. If the measurement differs from the slider setting, the tonearm counterweight needs adjustment.

The tonearm counterweight, located on the back of the tonearm assembly, is adjusted by loosening its screw and sliding it forward or backward to increase or decrease the tracking force.

Achieving the correct 1-gram measurement may require a few adjustments.

After securing the counterweight, the next step, with the platter motor still disconnected, is to adjust the record tracking sensor.

When in Play mode and the tangential arm assembly is moved towards the platter, the tracking sensor lamp should glow.

The sensor’s adjustment screw is located on the side of its housing. To adjust it, place the tonearm with a cartridge on a record. While a specific Bang & Olufsen test record is recommended, any vintage record can be used. Manually rotate the platter and adjust the screw until the servo motor starts advancing the spindle within 2 ± 1 revolutions, and then continues advancing with each revolution.

Finally, the forward and reverse scanning LDR devices require adjustment.

The service manual recommends a 620mVDC reading on each LDR after five minutes of operation, but a setting of 650mVDC is preferable.

In this Beogram 8002, the two LDRs were reading slightly over 700mVDC. While this is still functional, adjustments were made to bring them closer to 650mVDC.

After adjustments, all functions, including the Pause, were tested and worked as expected.

However, the scanning LDR devices posed a concern. While adjustable to the desired values, the two LDRs have significantly different settings.

As shown in the photo, one LDR’s adjustment screw is much higher than the other.

Although not expected to be identical, the LDR settings should be closer. The higher screw appeared to be at its limit.

Further inspection confirmed that one of the LDR adjustment screws had reached its limit, leaving no room for future adjustments as the sensor lamp ages.

This situation is not ideal, as it restricts future adjustments. While the lamp appears to function correctly, the large discrepancy in LDR settings requires attention.

The scanning sensors operate by using the lamp to illuminate each LDR through separate metal apertures controlled by the scanning buttons. Pressing a button closes the aperture, changing the LDR’s resistance, and directing more voltage to the corresponding side of the servo motor, moving the arm.

When neither button is pressed, the LDRs are in a neutral state, ideally within the 620mVDC to 700mVDC range. The two large black screws regulate the amount of light reaching the LDRs in this neutral state.

To test the LDRs’ response, both adjustment screws were opened fully to maximize light exposure.

With +15 VDC applied to the lamp and the scanning buttons in neutral, the resistance on each LDR was measured. The readings were around 16kΩ and 43kΩ, indicating a significant difference.

While some variation is expected, this discrepancy is too large. The LDR measuring 43kΩ is the one requiring adjustment to its limit during the previous procedure.

The next step is to find a matching pair of LDR devices with closer readings.

Additionally, it’s advisable to replace the sensor lamp while replacing the LDR, ensuring optimal performance.