This wiring diagram is taken from an 1983 Rainbow II. It should also work with the Prestige 150 and 250 as they have the same controls (3 way switch, 2 volume and 2 PEQ tone controls).
- The volume pots are 500K log/audio
- Capacitors C1 and C2 are 0.022 microfarad Mylar
- The PEQ tone pots were specially made for, and patented by, Matsumoku. They are not a standard part and there is no commercially available equivalent today.
1 – these ground/shield cables are soldered to the body of the pickup selector switch
2 – for clarity these wires are shown as blue on the diagram, on the guitar they are white