Panasonic NV－450 VCR system modification circuit diagram

Published:2011/8/22 3:26:00 Author:Jessie | Keyword: Panasonic , VCR system , modification circuit | From:SeekIC

Panasonic NV－450 VCR system modification circuit diagram is shown as the chart. TA7673P is a special radio frequency modulation integrated circuit, and its sound carrier frequency is 5.5 MHz. T1 and Cllare connected tothe pin 4andpin5 of rf modulation integrated circuits, which can determine the oscillation frequencyof voices. Therefore, the method ofchanging sound carrier frequency from 5.5 MHz to 6.5 MHz is: change C11 of LC resonant circuit from 47p to 27p, then connect VCR with television, let video replay a box of good video, then watch videos as side trimming the magnetic cores of Tl to make the sound best.



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