一、邮票出售机:1.开机后,首先对鉴币板进行测试,拔下鉴币器上的保险灯,分别投1、2、5分硬币,用万用表测F_1(或F_2、F_5)通道的整流输出电压。若均在4伏以上,说明三通道均好。同时还需测量三组射耦双稳电路三极管集电极电压,若测量结果是;二分、五分的射耦双稳电路能够翻转,而且收币电路的三极管集电极 First, the stamp vending machine: 1. After boot, first test the coin plate, unplug the lamp on the coin detector, respectively, vote 1,2,5 cents coins, with a multimeter to measure F_1 (or F_2, F_5) channel Rectifier output voltage. If more than 4 volts, indicating the three channels are good. At the same time also need to measure three sets of emitter-to-collector bistable transistor collector voltage, if the measurement result is; two points, five points of the flip-flop bistable circuit to flip, and sink circuit transistor collector