Sony TRV312 Operating Instructions Manual page 20

Checking the recorded picture
To go back to the last recorded point after edit search
Press END SEARCH. The last recorded point is played back for about 5 seconds if the
tape was recorded in SP mode, or 10 seconds if the tape was recorded in LP mode,
and stops. Note that this function does not work once you eject the cassette after you
recorded in the tape.
To begin re-recording
Press START/STOP. Re-recording begins from the last recorded point or the point
you released EDITSEARCH. Provided you do not eject the tape, the transition
between the last scene you recorded and the next scene you record will be smooth.
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