Domenik,

I have a second hand SG-X Expander from Solton ( SN # : 1202/137), witch with i have some problems.

I have adressed my question to Solton, buth didn't recieve any answer.

Since You are the developer of the SM-X Expander, i ask You :

Wenn i use MIDI IN-1, than lots of notes keep hanging, and lots of notes don't play at all. When playing a midi-file thru MIDI IN-1, than the Expander go totaly crazy.
MIDI IN-2 works normal.

After a quick look inside, i noticed that the MIDI IN-1 signal is routed to the display-panel, where it is handled by microcontroller 89C51 (programmed with V1.03)
On the other hand, the display-panel functions works perfectly.

By replacing jumper JP9 on the mother-board, the MIDI IN-1 is routed directly to SAM9708, pin 29. This way, MIDI IN-1 works normal, but without control of the display-panel.

To me, it looks like the MIDI IN-1 signal is not properly merged with the display-panel signal.

Is this a known problem ?
Is there a solution to solve this problem ?

I hope You answer my question, in meantime, please except my best greetings.

Ketron User