雷击V511 3C1015/V581 2SC2688/N770 HS0038/V110 2SD400/D701 CH04001雷击直接损坏.自搜手搜不能搜出正常图象及声音.用微调能调出正常图象但无声音,恢复正常收看状态只显蓝屏.AV状态下图声均无.CH04001/24C02/LA7680/LC4066均已换新.将检查数据传上,高频头AFC电压4V左右基本正常,V730 BLK30A的S1.25V /D1.25V/G0.1V. V780 C0.1V E0V B0.65V V740 C12V B0.3V E1.25V LC7680 43/6V 44/0.5V 现主要44脚电压不正常应为8V左右.LC7680,V005及V048已检查没有问题. 最后将CH04001再次换新故障排除. |
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