Consumer Electronics

BLOCK DIAGRAM OF A VIDEO CASSETTE, RECORDER

Apart from the deck mechanism the recorder consists of an ensemble of printed circuit panels, each dealing with one or more aspects of the machine's operation. A block diagram of a typical basic machine, showing signal paths is given in Fig. 33.34.

During record the VCR's receiver section (tuner, IF and detector) converts broadcast transmissions into baseband sound and vision signals. The sound signal passes to the audio recording head after the addition of a bias signal, which is also fed at high power to the full-width erase head to wipe existing tracks off the tape. The vision signal is split by filters into luminance (black-and-white) and chrominance (colour) components which are dealt separately ...