TDK combats one of the irregularties _ resonance noise _ by using advanced thermoplastics and an extra-high-density cassette mechanism.
2.
Similarly, it is recommended that cassettes be handled by the existing outer plastic case and that fingers not be placed anywhere inside the cassette mechanism.
3.
Even though DVDs do not have the problems of tapes, such as breakage of the tape or the cassette mechanism, DVDs can still be damaged by scratches.
4.
The case was somewhat larger because it was originally designed to accommodate a cassette mechanism; the RP77MB Sovereign IV was a radio-only version of the RPC1 radio-cassette recorder.
5.
If they don't there is probably something wrong with your player so it needs repairing; if the others do play ok you could also look for dirt or obstructions fouling the tape cassette mechanism . "'Sp in ni ng Spark "'11 : 59, 13 March 2011 ( UTC)
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