Beomaster 4400 Type 2419: Front Panel Wiring & Reassembly

The last post left off with the Beomaster 4400 ready to have its front panel wired back up to the rest of the Beomaster electronics.

Part of the wiring from the Beomaster 4400 front panel components (switch assembly, PCB 6 and PCB 9) is accomplished with wire harnesses and connectors. Unfortunately there are a few wire connections that B&O left as hard wired. That is what makes the front panel disassembly such a chore.

The task becomes even more difficult if it is necessary to disassemble the switches...like I did in this restoration. That is because wires from the harnesses must be desoldered along with the removal of PCB 6 and PCB 9 to get access to the switches.

Now it is time to put everything back.

One wire re-connection task that does not have a harness or connector is for the speaker selection switches.  The Beomaster 4400 speaker connectors are on the rear panel of the Beomaster cabinet while the speaker select switches are on the front panel.  That is how they should be of course but it means the wiring must travel to and from the switches and connectors.

Here is a photo of the speaker wiring (including the headphone jack wires) and the switch panel board (PCB 9).

Here is a diagram that shows how the wires need to be connection on PCB 9.

This is a photo of the speaker and headphone jack before connecting the wires.

Here is everything wired back up.

Continuing down the front panel from the speaker wiring towards the FM tuning dial assembly I connected the various wire harnesses and individual board to board wires.

This wire harness connects the front panel tone control switches (Mono, Linear, Loudness, Lo Filter, Hi Filter) to the main board tone controls circuitry.
The photo shows the harness before and after being re-connected.

The next series of photos show details of the remaining loose wires that had to be connected.
That includes the wires that are part of the main, PCB 5 harness with the front panel lamps.

Next, I installed the harness with the slider controls (Volume, Bass, Treble, Balance).

Last, I re-installed the main FM tuning assembly.

Here is the Beomaster 4400 with the front panel assembly back in place.

In the next post I will re-mount the output amplifier transistors to the heatsinks, re-install the other PCBs (FM boards and preamplifier board) and re-connect the wires for powering up the Beomaster 4400.