Question about Amplifiers & Preamps

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Denon 455 i used to repair t.v`s for a living so i am fairly good with electronics so any help would be nice John

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  • john morgans Jan 27, 2009

    when i plug it in i get a click form the transiformer and the red light comes on apart from that nothing.



    Any help would be really helpfull

  • john morgans Feb 02, 2009

    thanks



    any idea where i start looking??



    johncmorgans@ntlworld.com

  • Scott Frye
    Scott Frye May 11, 2010

    What on the Denon isnt working?

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Typically amps do that for one of two reasons:
1. All the speakers arent connected proper
or
2. One or both of the amplifier output modules have failed.

I dont know if that model uses discrete transistors or STK type units.
Most of those parts are available off the shelf though

Posted on Jan 28, 2009

  • Scott Frye
    Scott Frye Feb 02, 2009

    Hi again,

    There's a heatsink in the unit.
    If there are 1 or 2 black modules mounted to it with 10 or more leads, that right there , is an amplifier module.
    Get the number off that.
    If not , it's power transistors mounted someway to the heatsink.
    Get the numbers off those.

    Please rate my help level too

    Thanks

    Scott


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