hifi engine

Teac 4070 Question

I'm new to the forum and I just got a teac 4070 open reel machine. Mechanically everything seems to be working fine. The tapes load and play fine. However, I am only getting sound from the right channel. The left one can be heard when the output level is up all the way but it is very quiet and distorted. The VU meter for the left side is also unresponsive during playback. I know there is a long signal chain to trace but are there any areas I should check first? Any information anyone can provide? Anything I should check and/or clean right away? As I mentioned this is my first reel to reel.