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Sony STR-V444ES

Discussion in 'Electronic Repair' started by Guest, Nov 13, 2006.

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  1. Guest

    Guest Guest

    Sony STR-V444ES speakers audio isnt kicking in.
    Good audio to the Headphones is fine.
    Scoped audio up to relays is fine.
    but still 27 Volts across relay coil. No signal to drop one side low and thus kick in the relay.
    WHY ??? ayone run into this before?
     
  2. boardjunkie

    boardjunkie Guest

    Bad transistor responsible for switching the gnd path for the relay
    coil.
     
  3. Arfa Daily

    Arfa Daily Guest

    No DC offset on the audio up to the relay on either channel ? If there is
    any, the protect circuit will inhibit the relay.

    Arfa
     
  4. boardjunkie

    boardjunkie Guest

    Ahhh...good point. Yes, look for any DC at the output.
     
  5. I think I've seen bad 1 ohm resistors in the power supply cause this. In the
    rear corner of the machine.

    Mark Z.
     
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