Polar Playing out of Tune

[fooloof]

I have a TI2 that has started playing slightly out of tune, a 1/4 flat, to be fairly precise. In other words, it's not quite a half-step flat. The way I work is that I sequence all of my synths through my Akai MPC 3000. I recorded a simple synth melody that has E as the main key. The sequence plays back flat, but not as low as E flat, just in between. I haven't done any major troubleshooting, but when I play the same sequence in another synth (Korg MS 2000B), it plays in the normal pitch. When I turn it off and on, it still is out of tune. how do I correct this? Thanks. I am going to consult the manual, but I wanted to get this post up in order to hopefully get answers as fast as possible. I can't work too well this way. I did record one track with the off-tune, just to have something different; but I need my stuff in key. Thanks.