| 光接收机电源板原理与故障维修 |
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| 引用本文： | 时晓峰,秦双华.光接收机电源板原理与故障维修[J].中国有线电视,2011(Z1):376-379. |
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| 作者姓名： | 时晓峰 秦双华 |
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| 作者单位： | 涟水县广播电视台; |
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| 摘 要： | 在HFC网络中接地电阻较大或无接地的光接收机,特别是在雷雨季节光接收机供电部分损坏率较高,目前CATV系统的光接收机开关电源大部分采用"UC3842"作场效应型功率晶体管的开关控制电路,只要掌握该种典型电路原理和应用数据,便可以维修由UC3842构成的多种开关电源。根据实物绘出了供电板电源原理图,介绍其工作原理、维修方法。
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| 关 键 词： | 光接收机 开关电源 UC3842 |
Optical Receiver Power Plate Principle and Maintenance |
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| SHI Xiao-feng,QIN Shuang-hua.Optical Receiver Power Plate Principle and Maintenance[J].China Cable Television,2011(Z1):376-379. |
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| Authors: | SHI Xiao-feng QIN Shuang-hua |
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| Affiliation: | SHI Xiao-feng,QIN Shuang-hua(Lianshui Radio and Television Stations,Jiangsu Lianshui 223400,China) |
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| Abstract: | The damaged rate of HFC network system of grounding resistance larger or no grounding of optical receiver,especially the power supply part in the thunderstorm season is higher.Currently CATV system network of optical receiver switching power supply mostly used UC3842 as field effect transistor type power switch control circuit.As long as you learn this typical circuit principle and application data,you can repair switching power supplys composed of UC3842.The article plots electric power plate schematic dia... |
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| Keywords: | optical receiver switching power supply UC3842 |
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