Hola esta es la respuesta de Mc, menuda coña
Hi Chuck,

I have never heard of this. I can understand how it can happen. With the MC205 turned off, it will place an excessive and probably a nonsymmetrical load on the Yamaha. This will cause the Yamaha preamp to output DC. This DC is amplified by the power amplifiers, producing DC at the amplifier output and causing the protection circuit to trigger.

Possible Remedies:

1. Can the Yamaha power amplifier be disabled by setup options? If so, it should prevent it from turning off.
2. If the Yamaha power amplifiers are to be functional when the MC205 is turned off, then even if the Yamaha does not turn off, the sound will be very distorted.
a. Make a cable to connect the Yamaha RCA Outputs to the MC205 Balanced inputs. This will significantly reduce distortion and probably prevent the Yamaha from shutting off. The sensitivity of the MC205 will be reduced by 6dB, so the system gain may not be sufficient.
b. Make a cable to connect the Yamaha Speaker Outputs to the MC205 Balanced inputs. A resistor divider is required to reduce the Yamaha Speaker output to a safe level for the MC205. The divider should reduce the output to about ¼ to maintain good S/N.

If we have more details of how the system is being used with the MC205 power on and off, maybe there are other options to suggest.

Ron Evans