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• The use of a cassette with more than 90 minutes of play time is not recommended except for long, continuous recording or playback. If you have questions or problems concerning your player, please consult your nearest Sony dealer. 3-228-217- 11 (1) Radio Cassette-Corder Operating Instructions Owner’s Record The model number is located at the bottom, and Record these numbers in the spaces provided below. dealer regarding this product. Model No. ____________ Serial No. ___________ _ CFM-20/30TW S