Sony 7182M no power at all

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  • rippergr
    Badcaps Veteran
    • May 2014
    • 345
    • Ελλάδα

    #41
    Re: Sony 7182M no power at all

    I measured PU1 in pin 3 which has 0,3V . PU25 pins 5,6,7,8 still no voltage

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    • rippergr
      Badcaps Veteran
      • May 2014
      • 345
      • Ελλάδα

      #42
      Re: Sony 7182M no power at all

      Originally posted by p1muserfan
      The only other suggestions I have is to check PC25, only 1 side of that capacitor should be short to ground. If that's not the problem follow DC_IN_R off of pin 5 from PQ25 to page 60, "system SCP protect" circuit. Maybe PD8 is blown? If you had an adjustable power supply you could put 2v and 1a to pin 5 of PQ25 and whatever is bad would heat up. That's the quickest way to find a bad component.
      On page 60 I measured PD8 which has no voltage on both sides.
      PD7 no voltage on both sides.
      PQ7 has 19V on 2 pins (I don't knwo which pins are because there is no sign which on is the first pin, I have attached a picture of the two pins) and no voltage on any other pins.
      I think the problem is in one of components on page 60.
      Can someone help me how and what to test ?
      Attached Files
      Last edited by rippergr; 10-04-2014, 05:02 AM.

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      • rippergr
        Badcaps Veteran
        • May 2014
        • 345
        • Ελλάδα

        #43
        Re: Sony 7182M no power at all

        Anyone with an idea?

        Comment

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