Does anybody can help me with information, how to initiate (reset, start-up) mentioned Roland -D50. I heared that few keys should be presed togedher, but that is all I know.
Many thanks for help
Best regards

In most synths there are a few hidden functions that are used for
repairs.
The keys must be pressed first then turn the synth on after...

D-50: SPACE + DECREMENT : Test mode. You can test all buttons,
foot switch
and notes (for velocity + pressure) Also
checks
memory and a card...
" + INCREMENT : Gives credits and ROM version.....
" + WRITE : Tests L.A. Chip. You choose exact test
by hitting
UPPER(Audio test), LOWER(D/A test??), VAL
(mute) and
LOCAL(exit!).
" + DATA TRANS: Initilize global paramaters such as
tuning, patch
number for startup etc....


Please note, this will not set the D-50's patches back to factory settings, you'll need to laod them via MIDI, or use the original Roland ROM data card.

Many thanks for Your great support
Best regards