I've just been through the original TR-909 service manual and it looks like all of the applicable mods have been already been applied to the BOM.
One less thing to worry about.
TR-909 Service Manual Mods
the voice changes would be subjective, some prefer the older serial sounds.
toms would changed in attack and the rimshot sound too .
but i like the Rimshot from the last series much better . ( what this nava clone have. )
tr-909 service pdf file can u reading online . which parts on the mainboard changed .
http://manuals.fdiskc.com/flat/Roland%2 ... Manual.pdf
but i like the Rimshot from the last series much better . ( what this nava clone have. )
tr-909 service pdf file can u reading online . which parts on the mainboard changed .
http://manuals.fdiskc.com/flat/Roland%2 ... Manual.pdf