Glai,
Connect Track 1 and 3 outputs to your preamp if you are playing a two-track tape on four-track heads. Leave 2 and 4 open. If that doesn't work try using Track 2 and Track 4 outputs only. See if that remedies the problem. Often it is not "print-through" but simply the manner in which the tracks were recorded on the specific tape, or more accurately, the width of the track on the tape.
Connect Track 1 and 3 outputs to your preamp if you are playing a two-track tape on four-track heads. Leave 2 and 4 open. If that doesn't work try using Track 2 and Track 4 outputs only. See if that remedies the problem. Often it is not "print-through" but simply the manner in which the tracks were recorded on the specific tape, or more accurately, the width of the track on the tape.