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随着有线电视的普及,人们可收视的电视频道越来越多,传统的8至12个预选开关的彩电已远远不能满足人们的需要。这里有一个简便方法,只增加一个电位器就可方便地收看所有频道的电视节目,其改制方法如图。W为一节开关的电位器,可用黑白电视机的推拉开关。改装时,先找到电视机的调谐板,通过电缆将W的一端连到+33V调谐电压上,另一端连至调谐板地端,中心抽头通过开关K连至调谐板去高频头Tu端的接头上,然后将电位器固定于机壳的适当位置,改装即告完毕。
With the popularity of cable television, people can watch more and more TV channels, the traditional 8 to 12 preselection switch color TV is far from meeting people’s needs. Here is a simple way, only adding a potentiometer can easily watch all channels of television programs, the restructuring method shown in Figure. W is a switch potentiometer, available black and white TV push-pull switch. To modify, first find the TV’s tuning board, one end of the cable W will be connected to the + 33V tuning voltage through the cable, the other end connected to the tuning board to the ground, the center tap through the switch K connected to the tuner to Tuner tuner , And then the potentiometer fixed in the appropriate position of the chassis, modification is completed.