Hello guys,
Thanks to rasputin on this forum who gave us the schematics, i think i may have found the possible malfunctioning chip on my FS1R.
For a long time now, the user memory presets haven't been working well. Even after a factory reset, i get "@@@@@@@@@" for all the presets and after a while (and also randomly) my lcd screen starts blinking, i have problems playing notes, receiving midi information, transpose is at the maximum... Anyway, it's a big mess.
I discovered the service test mode with the schematics and apparently, there is a problem with the RAM (only once was it "NG" as in not good)
Do you think that the problem comes from IC2 (DRAM) and/or IC3 (SRAM) ? Is there a way to change those chips if i can find them ?
Or do you maybe have better ideas ?
I have already changed the battery and bought a EPROM with the OS upgraded but there's no change at all.