Re: Onkyo TX SV727: Found bad transistors, what else?
You should check the idling bias by measuring the Vdrops on the Emitter resistors you just replaced, once you have the Voltage (it will be in mV range) then you calculate the idling current through the output power transistor.
You can also check the DS offset at the speaker terminal since it sounds like the speaker protection relay (the one with delayed on) does come on.
You should check the idling bias by measuring the Vdrops on the Emitter resistors you just replaced, once you have the Voltage (it will be in mV range) then you calculate the idling current through the output power transistor.
You can also check the DS offset at the speaker terminal since it sounds like the speaker protection relay (the one with delayed on) does come on.
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