Roland seems to wants to deal with 'authorized service' shops and not so much with DIY repair. At least with schematics and internal components/parts. So... I ended up with this Alps 7 pos switch from Mouser. Works perfectly.
https://www.mouser.com/ProductDetail/688-SRBV170501
There were also 2 ea 1K ohm 0603 SMD resistors that were open. These were 2 of 8 located on the amp selector baby board that the switch was mounted on. Replaced same and all is well.
Initial problem was only two of the amp select choices was working. The above replacements corrected the issue. But in poking around the rest of the amp I could not help notice the Alps pots are not held together by much. Closer inspection led me to believe that this amp had been dropped on its top or stacked with something on top that placed pressure on the control knobs and pushed the back out of some of the pots (selector switch included). I'll be replacing these Alps with something more robust.
https://www.mouser.com/ProductDetail/688-SRBV170501
There were also 2 ea 1K ohm 0603 SMD resistors that were open. These were 2 of 8 located on the amp selector baby board that the switch was mounted on. Replaced same and all is well.
Initial problem was only two of the amp select choices was working. The above replacements corrected the issue. But in poking around the rest of the amp I could not help notice the Alps pots are not held together by much. Closer inspection led me to believe that this amp had been dropped on its top or stacked with something on top that placed pressure on the control knobs and pushed the back out of some of the pots (selector switch included). I'll be replacing these Alps with something more robust.