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RX-V520

ariel_ba

May 19, 2020
2
Joined
May 19, 2020
Messages
2
Greetings to all. I have a Yamaha tuner amplifier model RX-V520.
It does not turn on and everything implies that the microprocessor (UPD78F4218) is burned.
The question is where can I get that spare.
From now on, any help will be welcome.
Best regards.
Leonardo Pucci
BsAs. Argentina
 

ariel_ba

May 19, 2020
2
Joined
May 19, 2020
Messages
2
I checked all voltage at IC pins, and voltage at another parts; everything appears to be fine.
But, i dont have oscillator signal, and a voltage regulator with a little high temperature.
No ligths, no relay's clic, nothing at all.
Regards. Leonardo
 
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