To restore the factory settings on the TR-909, first turn off the power, then while holding down the [TRACK #1] and [PATTERN #1] buttons, turn the power on again.
Owner's Manual: https://www.roland.com/us/support/manual_archive/
To restore the factory settings on the TR-909, first turn off the power, then while holding down the [TRACK #1] and [PATTERN #1] buttons, turn the power on again.
Owner's Manual: https://www.roland.com/us/support/manual_archive/