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Reged: 29/05/06
Posts: 7905
Loc: northampton uk
Marshall MG30DFX (fixing of)
      22/04/11 06:59 AM
Son lugged one of these home in the early hours of Wed am.

Reported fault: Sound fades but can be reinstated by a big "clang" on the geetar.

I checked for drys around the TDA2050 power op chip but the problem turned out to be a poor contact thru' the headphone jack earth path. This carries the 0V speaker return current and thus effects speaker kill for headphone operation. This is it seems a very common failing of the design.

A re-tension and clean has it working fine but son will convey the message that if wonga is available(unlikely!) dad will fit a new jack, otherewise he can have it back pro bono..THIS time!


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Subject Posted by Posted on
* Marshall MG30DFX (fixing of) ef37a 22/04/11 06:59 AM
. * Re: Marshall MG30DFX (fixing of) _ Six _   04/05/11 10:01 PM
. * Re: Marshall MG30DFX (fixing of) ef37a   05/05/11 07:43 AM
. * Re: Marshall MG30DFX (fixing of) sszdl   28/04/11 11:32 AM
. * Re: Marshall MG30DFX (fixing of) ef37a   28/04/11 12:22 PM
. * Re: Marshall MG30DFX (fixing of) 4TrackMadman   26/04/11 03:48 PM
. * Re: Marshall MG30DFX (fixing of) ef37a   27/04/11 01:14 PM
. * Re: Marshall MG30DFX (fixing of) Folderol   28/04/11 06:33 PM
. * Re: Marshall MG30DFX (fixing of) Dave B   22/04/11 05:47 PM
. * Re: Marshall MG30DFX (fixing of) Dave B   22/04/11 11:07 AM
. * Re: Marshall MG30DFX (fixing of) ef37a   22/04/11 11:16 AM
. * Re: Marshall MG30DFX (fixing of) Folderol   22/04/11 06:30 PM

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