Question about Sony STR-DE685 Receiver

2 Answers

I have a hum or buzz on AM and FM bands only.

All other inputs are fine, with no buzz or hum. Any ideas?

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  • Ed Misanko
    Ed Misanko Mar 25, 2009

    same problem for me also no color with s-video cord output to TV

  • Scott Frye
    Scott Frye May 11, 2010

    Electrical interference from somewhere outside the box.
    Is it next to a motor or transformer or fan?


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I had the same problem, but it is not the tuner module! An exchange of capacitor C899(100μF/35V) on the standby board has resolved the problem. Under a dollar from an electrical store and you are all sorted. 10 minute fix for those with a soldering iron.

Posted on Apr 05, 2009

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Thanks

Posted on Apr 05, 2009

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My portable Bose speaker has just started to buzz a few times in quick succession, then stop for half an hour or so (whilst not in use). I have unplugged it from mains power and disconnected the iPod but...


This may be caused by external interference.

If you have an AM radio available, turn it on and tune to mid-band (1000kHz for example) and leave it on.

If there is a strong source of static (table saw or other motor-driven AC device) it will show up at the same time as your buzz.

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I had the same problem and was able to repair it quite easily. Only thing needed is some basic soldering skills.

Problem description:

  • Suddenly a quite loud and disturbing (scratch/screech/buzz) noise appears.
  • Sometimes the noise is gone but it reappears sooner or later.
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Cause:

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Solution:

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In my case afterwards the problem was gone and the device is working properly again.

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Possible that the band knob has slipped on it's shaft or has become out of line or loose. Try pulling the knob off, making not of the position and see if the shaft is loose. Try to get back to me on this.....

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1 Answer

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