I am assuming you are able to hear the TT, through the speakers, when playing vinyl? For testing purposes, please try the TUNER source, by changing the record selector switch to TUNER.
If you were to listen to the source you wished to record, and were not using an external processor, you could use the external processor output, to ensure everything is correct on your tape decks and that your RCAs are in good shape.
Please follow up with me at customerservice@outlawaudio.com .