"Dave Plowman (News)" wrote in message
...
This is the correct usage though. My Naim amps work fine at the moment
but could probably do with a service (re-cap etc.) to bring them back
to their best.

I'd call that a repair.

They are not damaged.
Capacitors wear out, they are a consumable. No difference from spark plugs
in a car being replaced. Part of a service to get it's best performance.