The indicator lamps are now all replaced on this Beomaster 2400. The old lamps (except for one) were still working but the age of the lamps is unknown so with this restoration it will be documented when they were changed.
The only lamps I converted to LEDs are the three lamps for the Bass, Treble and Balance position indicators. Those lamps have no function in the circuit except to illuminate the slider positions when the Beomaster is on. From past Beomaster 1900/2400 projects I like using two LED devices per lamp position here to give the light coverage on the indicator masks. The reason to change these three incandescent lamps is because the give off the most heat which I have seen cause damage to the indicator masks. You can also see in the photos that the center of the red indicators lenses on these three lamps is faded white due to the heat. The replacement LEDs will run much, much cooler.
So I will replace those using replacement lamps the Beomaster owner sourced from Martin Olsen.
Here are the Volume Control and Source Select lamp boards with their new lamps.
I am now ready to recheck the service manual adjustments again before playing some music through this receiver.