一、J计数器的故障原因及排除方法数字程序控制线切割机的J计数器是采用十进制减法计数器,其二进制编码是采用8421制,即为: 十进制减法计数器,逻辑图见图1: J计数的常见故障为: 1.运算正确,但数字管显示不正确。对于这种故障,往往由于控制数字管阴极的3DK2(或3DG408等)硅三极管损坏所致,只要更换硅三极管即可解决。 First, the J counter failure causes and solutions Digital controller J-line cutting machine is the use of decimal subtraction counter, the binary code is 8421 system, namely: decimal subtraction counter, the logic diagram shown in Figure 1: J count of common Fault: 1. The operation is correct, but the digital tube is not displayed correctly. For such failures, often due to the control of digital cathode cathode 3DK2 (or 3DG408, etc.) silicon transistor damage caused, as long as the replacement of silicon transistors can be solved.