Realistic STA-720 troubles...

Discussion in 'Solid State' started by huntrb1, Feb 8, 2018.

  1. huntrb1

    huntrb1 New Member

    Messages:
    5
    On my model the tr807 mosfet burned out, but i cant find the specs. Anyone know about it?
     
  2. eizner23

    eizner23 Active Member

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    419
    Location:
    Madison, WI
  3. huntrb1

    huntrb1 New Member

    Messages:
    5
    Unfortunately not, but I'm guessing I miss-read it. It probably TR-801, which in a sanyo 2SD600 I believe.
     
  4. eizner23

    eizner23 Active Member

    Messages:
    419
    Location:
    Madison, WI
    Can you describe the symptoms the unit was experiencing. That transistor resides in the power supply board. Did you check voltage on coming out of power supply? Service manual shows this for voltages:

    20180208_142236.png

    My guess is you want to get readings from pins 5-9
     
  5. huntrb1

    huntrb1 New Member

    Messages:
    5
    The unit turns on but doesn't output sound. I've already acquired myself a replaced part, but I'll see if I can get a reading.
     

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