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巧修Ｊ２４５９型学生示波器康生祥（甘肃省山丹培黎学校，７３４１００）两台Ｊ２４５９型学生示波器，购回第一次使用时便出现故障．现象为开机后在正弦挡检验示波器性能时，发现荧光屏上只有一根竖亮线．在亮线上叠加有一竖长而纹乱、不稳定、不光滑的窄８字形，无正常...
Skillfully repairing the J2459 student oscilloscope Kang Shengxiang (Shandang Peili School, Gansu Province, 734100) Two J2459 student oscilloscopes failed when repurchased for the first time. The phenomenon is that when the oscilloscope checks the performance of the oscilloscope after turning on the power, it is found that there is only a vertical bright line on the fluorescent screen. On the bright line superimposed with a vertical long and disorderly, unstable, non-smooth narrow 8-shaped, no normal...