Nord User Forum

Hello,

I am looking for a Studiologic SL88 Grand controller as an additional to my NS3C for playing the piano engines. I can get a second hand SL88 at a quite low price but 6 keys are having a malfunction, they either don’t work at all or just sporadically. The keys in question are C#4 to F#4, so 6 keys in a row. Does anyone here have an idea of what’s probably damaged and some experience on how to fix this, and may this a big issue or a relatively simple task for DIY?

Thanks for any kind of response and help

It could be the connectors between the keyboard and mainboard,first of all (I'd suggest to the current owner to unseat and reseat the flat cables on both sides); if still not working then it could be a HW mulfunction at the level of the scanning circuit (not selecting that row of the keyboard diode matrix properly or a broken diode) which requires some electronics repair skills to diagnose and fix.

Thanks Max,

the current owner seems not to have any skills to open it and check the connectors. I do have some electronic skills and think I’m able to repair by myself to some extent - I will think ….

Schorsch wrote:Thanks Max,

the current owner seems not to have any skills to open it and check the connectors. I do have some electronic skills and think I’m able to repair by myself to some extent - I will think ….

You can find the schematic of Fatar TP40/88 at doepefer.de site

https://www.doepfer.de/DIY/Matrix_88.gif

this may help you to focus on the part of the matrix related to the non working keys.