From ChristianH Sent Fri, Jan 26th 2018, 10:03
From ChristianH Sent Fri, Jan 26th 2018, 10:03
That button looks suspiciously similar to this one: https://www.reichelt.de/Eingabetaster-Digitast-/DT-6-SW/3/index.html?ACTION=3&LA=2&ARTICLE=7241&GROUPID=7589&artnr=DT+6+SW&trstct=pol_10 The data sheet shows that there are different caps available (however not from this seller). However, I remember them as not being overly reliable (which would make them an appropriate replacement ;-) When I used one of those some 30 years ago, the mechanical click became softer over time, which didn't feel good. And I didn't find anything on contact material in the data sheet, but I remember them being silver plated, which will tarnish over time. The very short travel doesn't do much self-cleaning. Chris On Thu, 25 Jan 2018 22:29:50 +0100 Florian Anwander <xxxxxxxxx@xxxx-xxxxxx.xx> wrote: > Hello Peter > > On 25.01.18 00:00 , Peter Forrest wrote: > > I just heard from the tech who is looking at this Pearl SC40. > > > > "Very unfortunately although the pcb footprint looks like a normal Omron > > tactile switch from behind they turn out to be some cheap nasty carbon puck > > on a silicone dome type switch with a snap on custom cap (heck, even the > > CASIO CZ1000 uses Omron switches!). > this made me nervous, so I disassembled my SC40 - unfortunately not > completely, because the frontpanel is partially very tricky to > disassemble. But I took a picture from the rearside of the panel pcb; > and appearently these switches are in fact soldered parts; they are not > rubber stamp on printed pcb contact areas as we know it from keyboards. > Then I went to my workshop and found immediately a momentary switch, > which would fit the pcb. I can't tell you the brand or type, but it > exists. It should not be too diffcult to mount / glue the switch caps on it. > > Maybe a brave soul recognizes the type of switches, the distance of the > solder points is appearently 0.2 inches. > > pictures are here: > http://www.florian-anwander.de/pearl_sc40/pearl_sc40_panelpcb.jpg > http://www.florian-anwander.de/pearl_sc40/pearl_sc40_switchreplacement1.jpg > http://www.florian-anwander.de/pearl_sc40/pearl_sc40_switchreplacement2.jpg > > Florian