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che zai dui jiang ji wei xiu shi li
Author(s): 
Pages: 29
Year: Issue:  8
Journal: Family Electronics

Keyword:  维修实例 对讲机 万用表电阻档 天线 接触不良 指示灯 话筒 基站 开关 汽车蓄电池;
Abstract: <正> 一部美国产友利电(Uniden)牌SMS825TS车载对讲机,接收正常,发射时发射指示灯时亮时灭,话音发送不出去,无法与基站联网通信。首先怀疑话筒发射按键PTT开关接触不良,拆下用万用表电阻档检测正常,更换新话筒故障依旧。又怀疑天线存在开路或短路故障,但更换新天线仍不能排除。接着检查从汽车蓄电池两端引出的电源线,也没有发现破损情
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