Unloading A Cassette - Sony Digital betacam DVW-707 Operation Manual

Checking the tape for slack
Pressing in the reels lightly, turn them gently with your fingers in the
directions shown below. If the reels will not move, there is no slack.
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Checking the tape for slack

Unloading a cassette

With the power supply on, press the EJECT button to open the cassette
lid, then take out the cassette. If you are not going to insert another
cassette, close the cassette lid.
It is possible to take out the cassette and close the cassette lid unless the
battery voltage drops below about 9 V.
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Chapter 3 Recording and Playback