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故障现象 一台奇声HWCD910(12)P/TSDL无绳电话的主机作为普通有线电话使用,各种功能正常,但主机和手机之间对不上密码,导致手机无法使用。 分析检修 无绳电话的手机与主机之间由48/45MHz调频波段进行双工通信,主机和手机对不上密码,可能是主机或手机的发射通道或接收通道不正常造成的。针对这种问题,检修时需要一些特殊仪器,如场强仪、频率计、超高频毫伏表及高频示波器等,业余条件可以利用身边现有的仪器因陋就简进行检修。
Symptom The host of an odd HWCD910 (12) P / TSDL cordless phone is used as a normal wired phone. Various functions are normal, but no password is available between the host and the phone, which makes the phone unusable. Analysis and maintenance of cordless phones between the phone and the host by the 48 / 45MHz FM band duplex communication, the host and the phone can not password, may be the host or cell phone transmitter channel or receiver channel is not caused by abnormal. In view of this kind of problem, the overhaul needs some special instruments, such as the field strength meter, the frequency meter, the ultrahigh frequency millivoltmeter and the high frequency oscillograph, etc., The amateur condition can use the nearby existing equipment because of the simplicity to carry on the overhaul.