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XDI型信号发生器广泛应用于教学科研部门,功率放大器是故障的多发部位,它由两部分组成:放大电路、保护电路。发生故障时,这两部分的现象相互联系。故障的特征是判断故障类型和发生部位的依据。 1 过荷指示灯亮这一故障现象是保护电路的继电器J_2不吸合造成的。当其它电路正常,BG_(20)集电极电压处于正常值18V左右时,是继电器J_2内部损坏断路或外部接线开焊造成,此时应对继电器
XDI-type signal generator is widely used in teaching and research departments, the power amplifier is a fault multiple parts, which consists of two parts: amplifier circuit, the protection circuit. In the event of a breakdown, the phenomena of these two parts are interlinked. The characteristics of the fault is to determine the type of fault and the basis of the site of occurrence. 1 overload indicator light is a failure phenomenon is to protect the circuit relay J_2 do not pull. When the other circuit is normal, BG_ (20) collector voltage is about 18V normal, it is relay J_2 internal damage to open circuit or external wiring open welding caused by this time to deal with the relay