sony reel to reel tc756
Help! I am new to hifi and hope I am in the right place. Recently purchased a Sony tc756. The unit had been in storage a long time. The solenoid mechanism, to bring the tape to the head was frozen. That is fixed. The machine tracks perfectly playing tracks 1 and three for probably, five minutes then suddenly it starts picking up tracks 2 and four playing backwards mixed in with tracks 1 and 3. I don't see the
tape moving up or down on the head. Any ideas on how to fix this would be greatly appreciated.
Have a great day! John