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Technics SU-V470 Power on, but no Current drive Light

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    Technics SU-V470 Power on, but no Current drive Light

    Hello, I'm tinkering with this amplifier. The 'Current Drive' light doesn't come on, and the relay doesn't power on either.

    I've identified a possible issue—I think—where Pins 3, 6, 12, 13, 15, and 16 have a positive voltage of 22V. However, Pin 18 shows 0 voltage, and Pin 17 registers -1V.

    I'm considering replacing the SVI 3205 IC, but it costs 50 pounds. Therefore, I want to make sure it's actually dead before purchasing a replacement.

    Any suggestions would be greatly appreciated.
    Attached Files

    #2
    check power supply first and any fuse resistors .

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