Audio Amp ground.. which one?

Discussion in 'The Projects Forum' started by 1-3-2-4, Oct 24, 2012.

  1. 1-3-2-4

    Thread Starter Senior Member

    Dec 26, 2008
    198
    1
    This is from a Logitech Z680 amp

    The pins are labeled

    SHIELD
    VREGSS
    SGND
    VREGDD
    MUTE AMP
    STANDBY AMP
    SGND
    SUB AMP
    SGND
    CENTER AMP
     
  2. kubeek

    Expert

    Sep 20, 2005
    5,292
    995
    I guess that all the SGNDs should be tied to ground. Try checking with a meter if they are connected together.
     
  3. 1-3-2-4

    Thread Starter Senior Member

    Dec 26, 2008
    198
    1
    I will check when I get my replacement IC chip, One thing I have to ask say if one one end was connected to ground (RCA cable) that would not be a reason for the chip to open up and smoke would it?
     
  4. wayneh

    Expert

    Sep 9, 2010
    14,968
    5,434
    FWIW, "SGND" on my LabJack data acquisition device is connected to ground via a self-reseting thermal fuse.

    I guess my point is, read the documentation.
     
  5. 1-3-2-4

    Thread Starter Senior Member

    Dec 26, 2008
    198
    1
    You don't get docs like that on a consumer device ;)

    Anyways shield and Sgnd are both connected together.
     
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