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Troubleshooting Integrated Amp

Discussion in 'Electronic Repair' started by RemoGaggi, Mar 18, 2005.

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  1. RemoGaggi

    RemoGaggi Guest

    I just got a used NAD 3155 Integrated Amplifier. It has a main in and a pre
    out so it can also be used separately as a power amp or a preamp. When I
    use it as an intergrated amp, there is no output. If I turn the volume to
    max, I can hear the music very faintly. The same occurs when I plug in
    some headphones in. But, when I use a separate preamp and use the NAD as
    a power amp, it works fine. It appears to me that the problem is with the
    preamp section of the unit. There is only one fuse in the unit and it is
    fine. Can anyone offer a suggestion as to what the problem might be?
    Thanks.
     
  2. CJT

    CJT Guest

    It sounds to me like it's a problem in the switching. Are you sure you
    don't have it on tape monitor or something?
     
  3. Guest

    RemoGaggi:
    Make certain that a "Tape Monitor" or "Adapter" switch is not left on.
    Also try another set of RCA/RCA jumpers from the PREAMP OUT to the
    MAIN AMP IN jacks (Left & Right Channels) If there is a set of adapter
    or equilizer input/output jacks make certain that they are jumpered.
    electricitym
    - - - - - - -
     
  4. RemoGaggi

    RemoGaggi Guest

    The preamp out and main in on the back panel are not "jumped". In this type
    of amp, are they normally jumped? Maybe this is the problem?
     
  5. RemoGaggi

    RemoGaggi Guest

    Thanks electricity, It was missing the jumpers. Thanks for you help!
     
  6. Asimov

    Asimov Guest

    "RemoGaggi" bravely wrote to "All" (18 Mar 05 01:22:28)
    --- on the heady topic of "Re: Troubleshooting Integrated Amp"

    Re> From: "RemoGaggi" <>
    Re> Xref: aeinews sci.electronics.repair:43341

    Re> The preamp out and main in on the back panel are not "jumped". In this
    Re> type of amp, are they normally jumped? Maybe this is the problem?

    Geez, I was going to reply that for the 1,001th time!

    A*s*i*m*o*v

    .... A stereo system is the altar to the god of music.
     
  7. jakdedert

    jakdedert Guest

    You can either use a set of short RCA patch cables or fab your own jumpers
    with a couple of pieces of 10 gauge solid bare wire....

    jak
     
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