The paper introduces the principle of switch power which is composed by current control type PMW UC3842 and analyzes the shortage of protective circuit and proposes an improving idea.
The third chapter mainly introduces the hardware design of soft starter, including the main circuit, control circuit, drive circuit, and protect circuit and auxiliary switched power design.
3
介绍了彩显电源电路的基本原理及故障的分析和维修实例，对维修其它开关电源电路具有借鉴作用。
The working principle of colour TV supply source circuit and fault analysis were described. Some maintenance examples are helpful for repairing other switch supply source circuits.
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