| 摘要 |
<p>On the inlet lines of the primary colours (1, 2 and 3), the video signal reaches a device of three pre-amplifiers (4) which carry out an amplification to regulate by means of the contrast check. When getting out, the signals arrive at another analogous device, also consisting of three amplifiers (5) carrying out an additional amplification of the signals to arrive to levels apt to control the kinescope (6), while also the chromatic temperature of the white colour are regulated too. The adoption of pre-amplification (4) and amplification (5) devices, which work with D.C. couplings, excludes the presence of anomalies in the video signal and temporization faults, due to the absence of black reference during the horizontal flyback.</p> |
