Hi Tonio,
Thanks for your nice comment.
Sorry to hear you having problems with your Teac.
Is your deck the older model with a slide-switch below the transport-buttons ? (Fast - Pause - Play)
This is the early model of 2340 and can be the problem with weird playfunction.
About the buzz in recording mode, a common thing are the sync-switches on the head-cover, there is a pc-board behind the cover with 4 switches.
Because of the location a small bump from the front, can easy brake the pc-board and create channel-loss, weird buzz sound on record/playback.
Also check all wires going to the board, can be loose or poor solder-joints.
The pot's on these takes alot of time and some are hard to reach.
Line and Mic input control on the left side, have a common thing to get loose in the shaft, usually the outer knob.
If you take the left side-panel off you can check if the small metal-ears are loose on each control, and spray contact-cleaner inside the 2 pot's.
But before you start investing more money and time, be sure the heads are OK.
Re-lap or replacement is not cheap with alignment and adjustment afterwards.
A low hour 2340 machine is not a bad model, the higher speed the better result.
But if you have the older model with the slide-switch as I mentioned, be aware those are trouble-makers Tonio.
Just my 2 cents messing with these.
