1. Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
    Dismiss Notice

Yamaha Sub-Woofer -Model YST-SW320

Discussion in 'Repairing Electronics' started by RaimonAu, Aug 18, 2016.

  1. RaimonAu

    RaimonAu New Member

    Joined:
    Aug 10, 2016
    Messages:
    4
    Likes:
    0
    Hi Guys......Sub is switching itself off during quite passages of music or movies. Also makes a large thump when switching on or off !!...... Can anyone shed some light on what the cause maybe ?......Cheers RaimonAu
     
  2. crutschow

    crutschow Well-Known Member Most Helpful Member

    Joined:
    Mar 14, 2008
    Messages:
    10,624
    Likes:
    479
    Location:
    L.A., USA Zulu -8
    Is this new behavior in the operation of the sub?
    I would think the two problems are unrelated.
    So the sub has no switch to shut off the automatic-off mode?
     
  3. Tony Stewart

    Tony Stewart Well-Known Member Most Helpful Member

    Joined:
    Aug 31, 2012
    Messages:
    3,152
    Likes:
    282
    Location:
    Richmond Hill , ON Canada near Toronto
    Ther must be leakage in a large E-Cap or input stage transistor causing a large DC offset and some protection circuit detecting the DC offset.
     
  4. dave

    Dave New Member

    Joined:
    Jan 12, 1997
    Messages:
    -
    Likes:
    0


     
  5. RaimonAu

    RaimonAu New Member

    Joined:
    Aug 10, 2016
    Messages:
    4
    Likes:
    0

    Thanks Tony ..... I'll begin my diagnosing along those lines .....It seems I have 2 faults possibly at play here......Cheers Again Raimon
     

Share This Page