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How to program the pioneer compact stereo xr p170c and 270c
Press the tuner/band button until an fm or am frequency is showing, whichever band you want to do.
Use the two double arrow buttons just below the tuner/band button to tune in the desired frequency.
Press the big button to the right that is shaped like a baseball home plate.
This button has opposing arrows on it. Press either end; it does not really matter.