Hello,
My Beloved Cyrus One Amp (purchased new over 20 yrs ago has, for the first time ever, developed a problem! Intermittently dropping or part-dropping a channel: either left or right, and mostly when set on 'CD-Listen'. The location of this intermittent and variable fault was driving me batty until a lucky observation put me onto the selector switch and dicky contacts. The 65mm long aluminium switch housing is an inverted U in section and Strong. Looking into the open rear end shows a travelling block driven back and forth by the large 35mm diameter rotary finger knob, exposing some contacts when fully forward.
Question: How to get at and clean the contacts? The housing looks un-rip-offable and the two 4mm holes in the top surface do not show mounting screws exposed by any positioning of the slider.
I am reduced to poking alcoholic cotton buds up the back end and I don't expect positive and lasting results, although an enema or colonic cleanse of some sort seems the only option! A contact-cleaning tip from an old-hand mainframe computer tech was to use a lead pencil eraser. But physical access required.
Help Help JohnR
My Beloved Cyrus One Amp (purchased new over 20 yrs ago has, for the first time ever, developed a problem! Intermittently dropping or part-dropping a channel: either left or right, and mostly when set on 'CD-Listen'. The location of this intermittent and variable fault was driving me batty until a lucky observation put me onto the selector switch and dicky contacts. The 65mm long aluminium switch housing is an inverted U in section and Strong. Looking into the open rear end shows a travelling block driven back and forth by the large 35mm diameter rotary finger knob, exposing some contacts when fully forward.
Question: How to get at and clean the contacts? The housing looks un-rip-offable and the two 4mm holes in the top surface do not show mounting screws exposed by any positioning of the slider.
I am reduced to poking alcoholic cotton buds up the back end and I don't expect positive and lasting results, although an enema or colonic cleanse of some sort seems the only option! A contact-cleaning tip from an old-hand mainframe computer tech was to use a lead pencil eraser. But physical access required.
Help Help JohnR