Wed Oct 24, 2018 2:45 pm
The SP1200 switches are different from the usual tact switches but they are very easy to clean - use a very small jewellers screwdriver to prise the top of the switch cap off (push the screwdriver down between the switch cap and the black plastic side of the switch and lever the cap off). Be careful not to damage the front panel plastic as it is very soft. below the switch cap is a loose metal contact disk - remove this and clean the underside with fibreglass pen or switch cleaner, also clean the small metal contacts in the base of the switch, one is right in the corner. When all the metal is shiny again replace the disk and push the switch cap back in place, the switch should be good as new. This can all be done without taking anything apart. Occasionally, the contact disk might have got bent from years of use and the switch might still not work reliably, then it has to be replaced.