故障分析;开机该机有声音屏幕出现一条水平亮线,初步判断场扫描电路出现故障,检查电压发现,该机场输出集成电路LA7837的(3)脚无电压.3脚的外围元件接有一只6.2V稳压二极管VD560测量发现击穿换后故障排除 |
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