CLA, as a term, probably comes from Hasselblad basic service - which involves taking the camera apart. There is nothing you can do without taking the camera apart. It could also come from basic large format shutter service, which involves taking the shutter apart, It could come from basic Leica thread-mount service - which requires the camera be taken apart. That is, if it's meaningful at all, it should be cleaning the old lubricant and internal gunk, lubricating where required, adjusting the mechanism to establish spec. Frankly, it doesn't apply too easily to a camera like a Contax 139, which is not made in a way to be pleasantly serviced. Replace this, replace that, reassemble - once parts dry up, throw the thing away.
So people can use the term to mean SFA or they can use it in a more meaningful way. The majority of people seem willing to think it means SFA. Maybe people aren't familiar with SFA??
So people can use the term to mean SFA or they can use it in a more meaningful way. The majority of people seem willing to think it means SFA. Maybe people aren't familiar with SFA??