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RX-V520

Discussion in 'Troubleshooting and Repair' started by ariel_ba, May 19, 2020.

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  1. ariel_ba

    ariel_ba

    2
    0
    May 19, 2020
    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
     
  2. Martaine2005

    Martaine2005

    3,671
    1,002
    May 12, 2015
    What implies this?
    Is it dead, no lights etc?
    Have you checked voltages to the unit?

    Martin
     
  3. ariel_ba

    ariel_ba

    2
    0
    May 19, 2020
    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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