Hello, Thank you for the reply, up until now you are the only one. I have opened it all up and cannot find any damage circuit boards etc. I am conversant with electronics. I do feel that it is some sort of program problem. I have been on youtube and others have had this problem but as yet cannot find an answer. Roland do not want to know and will not help with advice. I am not certain if there is a way to do a factory reset but most of these electronic items have one built in. As I said earlier due to where I live you cannot get anything like this repaired here. It does seem strange that it is exactly two octaves that have failed. If you get any info please share. Thank you.
Most welcome. At the moment, I'm just predicting that it's not a software issue, as when I flick through the user's manual for the F-30/F-30e, there is no indication of a factory reset procedure. Instead, a lot of the information suggests that default settings are restored whenever the unit is turned off, and then switched back on again. That is, the user manual says that users can set transpose, etc etc etc ..... and the setting will remain until the unit is switched off.
Even though it's hard to say if any improvements to the situation can be made easily ------ one easy thing to try at least, is to see if there are any cables/connectors that can be 'carefully' undone ---- disconnected (inside the unit) ----- and reconnecting them.
There doesn't appear to be any service manual seen online for the F-30e, so that we can try to see what multimeter measurements could possibly be made - to check/test for electrical continuity between various points that is expected to have electrical continuity. A service manual could probably provide some clues about whether the key sensor system is arranged in groups --- individual groups --- in modules. So that --- if it's a modular system, one could then see what happens if one an adjacent working module is swapped with the non-working one ------ which could help with figuring out where the issue lies.