再谈电话机简易故障的维修陈万复自动话机故障的简易维修有时做起来并不简易。原因在于现在市售的电话机，大多数不附电原理图；下面以拨号故障为例，在没有电原理图的情况下，说明如何力所能及的排除一些故障。１．拨号后拨号音不断这种故障实质上是发不出号，或脉冲幅度... Talking about the maintenance of simple telephone failure Chen Wan Fu Easy maintenance of automatic telephone failure is sometimes not easy to do. The reason is that most of the telephone sets on the market are not equipped with the schematic diagram. The following example takes a dialup fault as an example. In case of no electrical schematic diagram, it shows how to troubleshoot some faults as far as possible. 1. After dialing the dial tone continuously this failure is essentially unable to pronounce the number, or pulse amplitude ...