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故障现象:一台GW-200彩色显示器工作中,屡次发生黑屏、指示灯灭故障,打开机壳检查,均为保险管烧断。 故障分析与维修:每次换上保险管,显示器通电正常,工作一段时间后,故障重现。故障现象表明,显示器工作以后,主要是机内温度发生变化,随着时间延长,机内温度不断升高,这时发生故障可能是由于受温度变化影响,机内某些元器件的参数改变,导致电路短路、熔断保险。初步判断故障元件
Symptoms: A GW-200 color monitor work, repeated black screen, light off failure, open the case check, are fuse blowout. Failure Analysis and Maintenance: Each replaced fuse, monitor power is normal, after a period of time, the fault recurrence. Fault phenomenon shows that after the display work, the main machine temperature changes, with the extension of time, the temperature inside the machine continues to rise, then the failure may be due to temperature changes, some of the parameters of the machine changes, Lead to short circuit, fuse insurance. Preliminary judgment of fault components