02-03-2012 03:07 AM - edited 02-07-2012 04:46 AM
I have the dreaded hum/buzz from my Z-5500 system and I can't stand it any longer. I've put up with it for 2-3 years now. My system was out of warranty when it appeared. I've read thread after thread about it, tried fiddling with cable from control pod, tried loosening and tightening the screws from the wire from the pod, tried tightening the bolt through the ring transformer etc and I can't get rid of it. I've took the system apart and tried eliminating ground loops, plugged out the fridge etc etc
I'm thinking of just buying a new system as I can't enjoy a film anymore as all I can hear is the buzz through the speakers and for quiet bits it's painful
Does anyone know if there's anything else I can purchase to make use of the system? Is there a new control pod I could buy that would sort the problem or is a new sub needed? Is there anything I can do to salvage this without buying a new system?
I paid around €350 for this system and for an action film the sound is fantastic still as it overpowers the hum but for quiet bits it's just too annoying and give me a headache.
04-28-2012 02:42 PM
your closest bet is getting a "Logitech Z-5500 Bypass Cable" which will match your system from ebay.
06-03-2012 12:15 PM
Refer to this Forum, I recently posted my Fix and a detailed solutoin for anyone still trying to fix thier system.
please note, in any attempt to fix your system, please find assistance from a technical person or you yourself need be technical as this is not an easy fix to non technical people.,,
in short, just read the "!!!IN SHORT!!!!" of my response.
Jevie (B. Jevon Davis)
04-06-2013 07:35 AM
I am having the same problem as you, but i still have 1 month of warranty so i'd rather wait to open it up.
Could you send me some pictures of the parts i have to check? You don't have to open your system up for me but some pics of google will do.
Thanks in advance, Robin.
04-06-2013 11:09 AM
Do you have hum or hiss:
Hum: Hum is a continuous low frequency sound, similar to the whirring of a low pitched motor. It has a typical frequency of 40-80 hz. Hum is generally caused by electrical interferences or when the recording equipment is not properly grounded. Cheap audio interfaces and microphones also introduce hum in the recordings
Hiss: In electronic devices, hiss is often caused when random electrons deviate from their intended path under the influence of heat. These deviated electrons manipulate the output signal voltage and thus an audio noise is created. Low quality recording equipment generally results in hiss. Hiss can also be due to environmental factors, like a/c, fans etc.
In magnetic tapes, noise often results because of the granular composition of the medium. The larger is the size of the magnetic particles, the more is the possibility of audio noise to appear in the medium.
Hum can be fixed by soldering main caps (10k uF/ 50V).
Hiss.... you need to look for GROUND short.