Dude,
I used to have a Teac 4340, I couldn't get it fixed to save my life, which ended up being a blessing.
There is much better gear out there, as good as the Teac was, this is a sign that it's time to move on and up.
Take the money that you were going to use to fix the Teac, and get something digital.
You'll be glad you did!!
GT