I have a Marantz 2265b and after repairing the amplifier, I tried to correct the needle location to match the radio frequency. However while removing the drum from the tuner, 2 small pieces fell out. After reassembling them, the needle does not travel from 88 to 108 on the FM scale. The two pieces I put back in set the physical stops of the tuner. Can anyone tell me how to properly assembly these pieces?