Beogram 4000: Installation of Beolover RIAA Pre-Amplifier

I am making good progress with the restoration of the Beogram 4000 from Australia that is currently on my bench. This post reports on the installation of the Beolover internal RIAA pre-amplifier for Beogram 4000 in this unit. This shows the board before installation:

The red wire is for making the connection to the 24V power rail.

For more information about the performance and measurement data on the Beolover RIAA circuit, please, visit this post. The Beogram 4000 RIAA uses the exact same circuit like the discussed Beogram 4002/4004 version in the above post.

This shows the original setup around the output terminal where the DIN5 cable connects to the tonearm wiring:

The installation of the Beolover RIAA for Beogram 4000 is pretty straight forward. Just unsolder the output cable and use a solder sucker to clean the terminals:

The RIAA board bolts directly ontop of the original output terminal using its screws:

Use the elongated mounting holes to push the RIAA board input pads as far as possible towards the terminals:

If necessary bend the terminals to be close to the pads. Then solder the terminals directly to the input pads using a generous amount of solder:

The next step is to feed the red power wire along the keypad cluster, underneath the strobe light assembly and then up to the main PCB next to the red wire that is already soldered to its solder side:

Then connect the RIAA red power wire to the same terminal where the other red wire is already connected:

This connects the RIAA board to 24V.

Then the output cable can be reconnected to the RIAA board output pads. They are spaced exactly like the solder fins on the original output terminal, i.e. the wiring setup does not need to be changed at all:

This shows the entire board as installed:

The final step is to pull the output cable a bit out of the enclosure to compensate for the depth of the RIAA board. For this the cable retainer at the feedthrough needs to be unbolted:

After pulling a couple inches of the cable though the opening, the retainer is bolted back into place to secure the cable in its new position:

And this concluded the installation. On to some final adjustments and a first test spin with this lovely Beogram 4000!