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黑珍珠７３９无绳电话机故障检修王姿顺故障现象主机电源开启后，ＣＡＬＬ指示灯即亮，扬声器中发出连续的“声打电话、对讲均不能工作。分析检修将手机控制开关推向ＴＡＬＫ后，主机”声消失，能听到手机发出的导频信号声，说明主机能接收到手机发出的信号，但不能解调启...
Black Pearl 739 cordless phone troubleshooting Wang Zishun failure When the host power is on, the CALL indicator is lit, the speaker issued a continuous "sound call, intercom can not work. Analysis and maintenance of the phone control switch to TALK, the host Sound disappears, can hear the pilot signal sent by the phone, indicating that the host can receive the signal sent by the phone, but can not be demodulated ...