Sanyo RP-7220 Schematic needed

[powerking]

All,

If someone has a copy of the schematic for this radio, I'd like to see it. It is ~~ 1972 vintage and covered the Am/Fm/Sw bands; with a front tuning meter and it ran on 4-C-cells. I need to replace the volume pot/switch and don't know the original resistance value of the thing.

Thanks,

Tom (PK)