Bosch Plena PLE-2MA240 schematic

[Andrei Preoteasa]

Hi, I've got one of them public address amplifiers, as a free giveaway for parts, I have looked into it, it seems that the amplifier stage is working, what I also found is that is a mono amp, with 10 x 2sc5200, on a single 50Vdc power supply, and has a transformer output. I could not find any schematic over the internet, I'm thinking if there is any way to remove the transformer output, I will post some pictures later on.

 

[PRR]

It is surely a 24V internal supply, since it meets-spec with a 24V battery backup.

This suggests the internal amplifier is aimed at about 0.4 Ohms; maybe 1.6 Ohms if BTL.

Use the 4 Ohm taps and be happy.

 

[Andrei Preoteasa]

Pictures

I have attached some pictures. What tap to use? I have only the output stage, power supply and the output transformer.
A schematic will be usefull.