Small Amplifier Board Repair Guidance - 20160902

Discussion in 'Technical Repair' started by Fred von Stein, Sep 3, 2016.

  1. Fred von Stein

    Thread Starter New Member

    Sep 2, 2016
    1
    0
    I have a Klipsch Promedia amplifier board that I am repairing.

    It was the EXACT same issue as posted here : http://forum.allaboutcircuits.com/threads/small-amplifier-board-repair-guidance.99973/

    That thread is closed so I am posting my question here. One thing that was mentioned was that on the actual amplifier board R18 and R19 are silkscreened on the board, but empty - they only have a jumper wire. In a schematic that was made way back in 2008/2009, the schematic showed 0 ohm - 5W.

    One comment from the previous linked discussion had a post from a user that said
    Another person said
    Since I am ordering some components from Digikey, I was interested in determine how I would bias the output, and how to determine what I might order to place in this location?
     
  2. ScottWang

    Moderator

    Aug 23, 2012
    4,853
    767
    Normally, the R18, R19 will use as 0.22Ω/5W, if the power of amplifier is more less then it could be 0.5Ω/5W.
    Since the R18, R19 had connected to the jumper, can you find any resistor as 0.22Ω/5W or 0.5Ω/5W?

    You can also to buy the mje3055T and mje2955T to replace TIP41C and TIP42C on this circuit.
     
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