RD-500: Checking the ROM version April 14, 2023 08:32 Updated Follow The following procedure can be used to check the ROM version: 1) Power on holding SYNTH, E. GRAND, MKS-20 and NUMBER 8. Related articles Do I need to open the .BIN file when updating the System Program? RD-700GX: Connecting to a Computer JV-80, JV-880: Additional Sounds JV-880: Loading Patches from a SR-JV80 Expansion Board or SO-PCM Card RD-500: Initializing the RD-500 - Restoring the Factory Settings