Roland JC-120 cleaning Volume pots?

[mark bond]

Maybe you can help me. I have an older solid state amp. I bought it new in late 70's mine has the metal jacks. The controls are starting to get quite scratchy. Can the control pots be cleaned on an USA made ROLAND JC-120 SN#344466? Or are they sealed? Seen videos on youtube of the Japanese made ones and the control pots are square and sealed. This amp is 40 yrs. old and has been very dependable. Is there no way to get to the wipers to spray them? If I can't spray them myself I just as soon not take it apart. Does anyone know anything about the older Roland JC-120s? Thank you, Mark

[J M Fahey]

That amp was made for many years, changing along the way.

"Square and sealed" sounds like modern ones, in that case replacement is advised, now 40 y.o. hints at regular metallic case pots, those have a narrow notch where the cleaner sopray nozzle may fit.

Only way is to take a couple pictures, no need to remove the board but probably the pots mounted at the ends may be seen.