QSC CX702 Loud Humming |
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micky7850
Registered User Joined: 04 June 2015 Location: scunthorpe UK Status: Offline Points: 11 |
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Posted: 24 December 2016 at 1:06pm |
Hi All,
I have just aquired a CX 702 power amp. Bought it cheap, It has a loud humming on both channels,when connected to speakers. The humming is a continuous volume regardless of gain settings on amp. I have not had time as yet to connect up mixer. ANY IDEAS.
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simonp1100
Young Croc Joined: 01 September 2008 Location: Bristol Status: Offline Points: 1103 |
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Sounds like the one off of Ebay.
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micky7850
Registered User Joined: 04 June 2015 Location: scunthorpe UK Status: Offline Points: 11 |
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Hi, Yes just got to find the problem
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vertx
Young Croc Joined: 14 March 2012 Location: Sydney Status: Offline Points: 578 |
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I've had a loose/unsecure AC cable/plug connection do that, one of the 3, maybe the earth? was loose in the back of the plug.
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micky7850
Registered User Joined: 04 June 2015 Location: scunthorpe UK Status: Offline Points: 11 |
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Will check It out. Thanks. I think it is probably on the power supply, as its affecting both channels.
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Pinyorouk
Young Croc Joined: 31 January 2011 Status: Offline Points: 550 |
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Deffective power suppy capacitor? |
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micky7850
Registered User Joined: 04 June 2015 Location: scunthorpe UK Status: Offline Points: 11 |
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Hi Thanks for that, I have schematic and will check that, as its christmas i have put it on hold at the moment. Will put mixer through it and check for any distortion ect. Merry Xmas Mick.
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micky7850
Registered User Joined: 04 June 2015 Location: scunthorpe UK Status: Offline Points: 11 |
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Hi All I put signal through mixer still humming at all volumes. The humming is same volume whatever gain is applied. Both Channels are working ok with no distortion. Just the constant loud hum.
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Micky
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