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日本SOMY公司生产的SEG—1210型特技信号发生器,已在很多单位使用。该机专供多台摄像机工作时产生切换、混合、分画面、键插入及色棚等特技效果。所以其结构庞杂,器件繁多。在维护中,我们发现该机的信号通道加装有一块电路图中未画出的电源保护电路板。为了同有关技术人员进行交流与探讨,我们将此电路介绍如下,仅供参考。 1.电路 SEG—1210型特技器信号通道工作电源由集成电路电子稳压器供给。其稳压器电路如图1所示。图中虚线框内为电源集成块,BG_(43)为电源调整管。
Japan SOMY company SEG-1210-type signal generator, has been used in many units. This machine is designed for multiple cameras work when switching, mixing, sub-screen, key insert and color studio and other special effects. So its complex structure, a wide range of devices. In the maintenance, we found that the signal path of this machine is equipped with a power protection circuit board which is not shown in the circuit diagram. In order to exchange and discuss with relevant technical personnel, we will introduce this circuit as follows, for reference only. 1. Circuit SEG-1210 type trick signal channel power supply by the integrated circuit electronic regulator supply. The voltage regulator circuit shown in Figure 1. Figure dashed box for the power block, BG_ (43) for the power control tube.