YK Thom Posted June 10 Share Posted June 10 Good morning, last evening we noticed a faint high pitched ring/whine sound in our condo. Initially thought it might be from upstairs but discovered it was coming from our speakers. I use what is now an older Marantz SR5008. It was most noticeable coming out of my Klipsch rears which I disconnected but inspection found it coming from my Ohm fronts as well. I turned off and unplugged everything in case it was electrical. That seemed to do the trick...until I rehooked the rears and then it returned. I disconnected the rear speakers again and left the entire system unplugged overnight. For now any way it seems to be gone. Does this sound like a wiring problem/electrical ( I have a cat that sometimes sneaks behind the equipment), or perhaps is the AVR preparing to depart this mortal coil? Any thoughts or similar experiences would be appreciated. 1 Quote Link to comment Share on other sites More sharing options...
billybob Posted June 10 Share Posted June 10 That AVR isn't that old but yes. It is old enough to have accumulated dust hair through vents on top if applicable. SR-7500 had, cat liked lying on top of. May not be your situation but, sound could come back, or not. A look around connections may not help. Others may have a say. 1 Quote Link to comment Share on other sites More sharing options...
YK Thom Posted June 10 Author Share Posted June 10 It is too smoky today to do much outside so I'm going to pull the cabinet out from the wall and check all the connections this afternoon. 1 Quote Link to comment Share on other sites More sharing options...
YK Thom Posted June 10 Author Share Posted June 10 Going to pick up a can of compressed air for dust removal this afternoon as well. She can't get to the receiver but general dust and hair floating around may be an issue. I think perhaps she may have jostled the wires in the back. With three channels and the sub going all is fine...at the moment. 1 Quote Link to comment Share on other sites More sharing options...
billybob Posted June 10 Share Posted June 10 You know and maybe getting along now in age, use so yes. Quote Link to comment Share on other sites More sharing options...
billybob Posted June 10 Share Posted June 10 Maybe you can determine which side rear by unhooking one and then the other, while happening again. Unless both. 1 Quote Link to comment Share on other sites More sharing options...
OO1 Posted June 10 Share Posted June 10 5 hours ago, YK Thom said: Good morning, last evening we noticed a faint high pitched ring/whine sound in our condo. Initially thought it might be from upstairs but discovered it was coming from our speakers. I use what is now an older Marantz SR5008. the Marantz SR5008. has an internal fan , clean the fan , make sure it spins freely , check the wiring for dry ends , remove the cover . blow the internals with air , DO NOT USE a cold compressed air can as it can damage electronics , spray DeoxIT D5 on potentiometers , spray DeoxIT on a rag and wipe the connectors for a clean contact . 1 Quote Link to comment Share on other sites More sharing options...
YK Thom Posted June 10 Author Share Posted June 10 1 hour ago, billybob said: Maybe you can determine which side rear by unhooking one and then the other, while happening again. Unless both. The first time it happened last night it was all speakers including the centre. 1 Quote Link to comment Share on other sites More sharing options...
billybob Posted June 10 Share Posted June 10 13 minutes ago, YK Thom said: The first time it happened last night it was all speakers including the centre. Maybe an anomaly that won't happen again. Yet, think it wise while blowing off the dust, debris outside to look at unit for anything eye visible. Condition may have been at a certain temp. for instance. So, yes by all means be certain runs cooler and can breathe, just in case. Sure most could think this, so maybe you can get more out of the Marantz. If a faulty resistor or broken solder joint, hard to find. Since think most are 8Ohm nominal, including the Walsh, leads back to your unit AVR unless, some interference occurred. 1 Quote Link to comment Share on other sites More sharing options...
YK Thom Posted June 10 Author Share Posted June 10 2 minutes ago, billybob said: Maybe an anomaly that won't happen again. Yet, think it wise while blowing off the dust, debris outside to look at unit for anything eye visible. Condition may have been at a certain temp. for instance. So, yes by all means be certain runs cooler and can breathe, just in case. Sure most could think this, so maybe you can get more out of the Marantz. If a faulty resistor or broken solder joint, hard to find. Since think most are 8Ohm nominal, including the Walsh, leads back to your unit AVR unless, some interference occurred. Fingers crossed! 1 Quote Link to comment Share on other sites More sharing options...
HiFi Heaven Posted June 10 Share Posted June 10 Try an extension cord plugged into a laundry circuit near your electrical panel. If that helps, the noise is conducted from the source onto your power line. Quote Link to comment Share on other sites More sharing options...
YK Thom Posted June 10 Author Share Posted June 10 I don't have anything that goes that far. I am in a condo tower in a city with a massive amount of power outs, the odd surge and brown out. My surge protectors might be toast as well. I'll have to go with the process of elimination. At the moment it is fine. No ryhme or reason for this . 1 Quote Link to comment Share on other sites More sharing options...
billybob Posted June 10 Share Posted June 10 5 minutes ago, YK Thom said: I don't have anything that goes that far. I am in a condo tower in a city with a massive amount of power outs, the odd surge and brown out. My surge protectors might be toast as well. I'll have to go with the process of elimination. At the moment it is fine. No ryhme or reason for this . That was going to be next... Quote Link to comment Share on other sites More sharing options...
YK Thom Posted June 12 Author Share Posted June 12 I seem to have cured the problem. Cleaned the entire back of the avr, checked all connections - one of the rca cables to the CD player was loose. Pulled out and re-plugged all HDMI cables. Whatever it was it seems to be gone! 1 Quote Link to comment Share on other sites More sharing options...
billybob Posted June 12 Share Posted June 12 Cool... 1 Quote Link to comment Share on other sites More sharing options...
YK Thom Posted July 30 Author Share Posted July 30 Update Well I thought I had corrected the problem of the high pitched test tone sound that was being emitted. Turns out I had accidentally partially corrected it. The sound returned Thursday night. This time I discovered the true cause - the speaker connection to the centre channel! A couple of the small wires in the cable were slightly loose and touching the casing, causing a short like effect. I don't use banana plugs and will likely pick some up. Twisted the wires tight, reconnected them and it is now permanently gone. I'm amazed I didn't spot this the first time. When I was working on it last time I must have inadvertently moved the wire back into position with out realizing it. 2 Quote Link to comment Share on other sites More sharing options...
Moderators dtel Posted July 30 Moderators Share Posted July 30 On 6/10/2023 at 10:34 AM, YK Thom said: Good morning, last evening we noticed a faint high pitched ring/whine sound in our condo. Initially thought it might be from upstairs I was going to ask if the upstairs tenant had an annoying whiney wife or partner but that wouldn't be PC so I didn't. Glad you got it worked out, well done. 1 Quote Link to comment Share on other sites More sharing options...
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