To clear the internal memory and reload the factory settings on the TR-505, power on while holding down MODE and PATTERN GROUP KEY A.
Owner's Manual: https://www.roland.com/us/support/manual_archive/
To clear the internal memory and reload the factory settings on the TR-505, power on while holding down MODE and PATTERN GROUP KEY A.
Owner's Manual: https://www.roland.com/us/support/manual_archive/