Yamaha P1600

Transistores originales 993 395 de la etapa de protección queda prendida la luz de protecxion

Donde podría conseguirlos por favor jose de Panamá gracias

Before you replace transistors replace the capacitors in the protection circuit and see if that helps. It happens that they get too weak to supply the circuit.

If that does not help then find the full part numbers of the transistors. If you can then not find them only see if you can find information about replacements.