If you're asking questions like this you probably shouldn't be tinkering around inside someone else's radio. Just saying
i was thinking that as well i sure hope you happen to tell the person who's radio your working on that you have never done this type of work on one before and then if they said go ahead with it your not buying someone a radio for breaking there's i'm all about someone learning but buy some junk radio's or even yardsale radio's cheap and start there with your own stuff if you break it oh well start over and try until you figure it out just not on other people's that could get you a bad rap and no one will let you try then just my two cent's worth