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Denon AVC-A1D "crackling" right-rear problem

Discussion in 'AV Receivers & Amplifiers' started by ddlooping, Oct 30, 2003.

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  1. ddlooping

    ddlooping
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    Hi all,

    My recently acquired 2nd-hand Denon AVC-A1D amp is playing up. :(
    It has worked flawlessly for about 2 weeks, but for the past few days the right-rear channel has been "crackling" randomly.

    I can't find a pattern: it works fine for a while, starts crackling for anything from a couple to 30 or more seconds, then stops (then starts again whenever).

    This happens whether I'm using the digital or analog input, when using a multi-channel mode (including DD and DTS).

    Varying the volume does not seem to increase/decrease the crackling
    Turning the volume all the way down does not stop it, but muting does.
    That would tend to point towards a post-amplification problem, right? :confused:

    I have switched the L/R speakers, then the cable, but the problem persists.

    I'd appreciate any suggestion. ;)
     
  2. ddlooping

    ddlooping
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    Any Denon specialist lurking in these forums? :)
     
  3. Jase

    Jase
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    Have you tried a Processor Reset? On the later Denon's it's done by holding down the Stereo & Direct buttons whilst switching the power on. The display will flash and then reset everything. If you do this, write down ALL your settings beforehand, speaker distances, channel levels, digital in assignments etc etc. It will then only take a couple of minutes to re-enter them all. :)
     
  4. ddlooping

    ddlooping
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    Thanks Jase, I'm gonna try that. :)
     
  5. ddlooping

    ddlooping
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    Well, I have reset the processor and the crackling hasn't re-appeared (the amp has been running for about 3 hours now).
    Let's hope it stays that way. :D

    Thanks again for the suggestion, Jase. :)
     
  6. Jase

    Jase
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    Hopefully it won't appear again. :) Handy trick resetting the processor as they do sometimes throw a wobbler!
     
  7. ddlooping

    ddlooping
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    It's started again. :(
    (after about 7 hours use)
     
  8. Jase

    Jase
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    Very odd. Only appears to do it once it's warmed up.:confused: I think your best bet is to get it looked at by Denon (Hayden Labs) and hopefully it will be something simple rather than a duff amp channel. Might be worth giving them a ring as well (ask for Keith Prady) tel 01753 888447.
     
  9. ddlooping

    ddlooping
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    It started doing it as soon as I turned it on this morning, so I'd guess overheating is not the cause.
    Thanks for the number, Jase, I'll give him a call. ;)
    (who's Keith Prady? :))
     
  10. Jase

    Jase
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    He's their Technical guy.:)

    Just another thought. You haven't got anything near it that might be causing interference? Another piece of kit maybe?:confused:
     
  11. ddlooping

    ddlooping
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    Cool, thanks. ;)
     
  12. ddlooping

    ddlooping
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    Sorry, Jase, I don't know how, but I missed your question. :blush:
    I haven't re-arranged my gear in anyway, and the Denon worked fine for 2 weeks.
    Also, this happens even when the amp is the only gear turned on, and nothing is plugged in it apart from the speakers. :confused:
     

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