Hello.
Yes there is two thoughts on this. I have to agree with Richard though, why keep dismantling a set when you can do the full job at one time?
Some people stress changing the Audio coupling cap and stopping there, but as Paul so rightly says caps on AGC lines are also known to give trouble, tone correction, frame oscillators, line o/p coupling, boost and boost decoupling caps etc.
I'm sure it must be easier to do it all in one go then once you have boxed up your radio or tv when there's a collectors gathering you know that you can switch on your prized items and they will work!
Trevor