Hi and welcome to this forum

Those boards are out of production for a while. Is it completely fried? If not then it may be easier to have it repaired by your local repair shop than to find a spare one.

Esta bastante fastidiada por eso lo del repuesto completo, necesitaría conseguir una fuente nueva o de segunda mano en perfectas condiciones. la compre en 2017 y creo entender que el fabricante debe de tener repuestos en torno a 10 años. por lo visto Presonus no esta interesado en mantener a los clientes

Hay alguien que tenga el esquema de esta placa?

She is quite annoyed about the complete replacement, she would need to get a new or second-hand source in perfect condition. I bought it in 2017 and I understand that the manufacturer must have spare parts for around 10 years. Apparently Presonus is not interested in keeping customers

Does anyone have the schematic for this board?

You might want to read the "EOS" note for the Classic mixers:

https://support.presonus.com/hc/en-us/a ... -2-Classic