调高加速极电压,一条亮线。场输出无故障,LA7687场输出脚坏。更换。又搜索不存台,且有跑台的现象。LA7687无中周,AFT脚正常。CPU的AFT脚为5V,已坏,换LC864512 -5D18。故障排除。 |
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