The following procedure can be used to check the ROM version:
1) Power up the JV-90 while holding NUMBER 1, 8 and PCM CARD B.
2) Press BANK 8.
3) Press EXIT twice to return to play mode.
1) Power up the JV-90 while holding NUMBER 1, 8 and PCM CARD B.
2) Press BANK 8.
3) Press EXIT twice to return to play mode.