Hello, I have a Harman Kardon 930 receiver in which the tuner string was very loose and rotation of the wheel didn't move the pointer. So I removed the string and tighten it up a little bit where it contacts the dial spring; however, I can't put the whole thing back. I have a SM and routed the string the proper way but if I put the dial spring into the drum where it was the pointer can't be moved more than 2/3 of the scale. To allow it to be moved the whole scale that little black dial spring should be completely removed from the drum. Please help, I really don't know what to do. Thank you.