故障现象来话振铃、复印功能正常，但不能拨号通话和收发传真。分析检修在拿起听筒后听不见拨号音，按下免提键有微弱的拨号音，但拨号时无论制式开关打在P还是T方式均不能拨号。在自动接收状态下，不能自动进行。据此现象，分析故障部位最大可能发生在话音信号处理板上，应检 Failure phenomenon Ringing, copy function is normal, but can not dial and receive and send faxes. Analysis and maintenance After picking up the handset can not hear the dial tone, press the handsfree button has a weak dial tone, but no matter when the dial-up switch in the P or T mode can not dial. In the automatic receiving state, can not be automatically. According to this phenomenon, the analysis of the fault may occur in the largest part of the voice signal processing board, should be seized