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故障现象:有时正常,有时开机数秒后出现无规则间断关机,或光栅闪烁,随即又恢复正常(行、场幅略有变大)。检修过程:故障现象很像接触不良,但据用户介绍,此机曾送多个维修部修理,但多则半月,少则一二天,又出现相同故障。开机后发现行输出、电源大部分元件均已换过,观察所换元件参数均与原机相符。开机测电容C831两端电压为125V,当故障出现时,电压在80～130V左
Symptoms: sometimes normal, sometimes a few seconds after the boot appeared intermittently shut down without rules, or grating flashes, and then back to normal (line width slightly larger). Maintenance process: the fault phenomenon is like poor contact, but according to the user introduction, this machine has been sent to repair a number of maintenance department, but as many as half a month, ranging from one or two days, and the same failure. Found after the boot line output, most of the power components have been changed, the observation of the element parameters are consistent with the original machine. Power measurement capacitor C831 both ends of the voltage is 125V, when the fault occurs, the voltage at 80 ~ 130V left