收到同行送来的故障机壹台长虹PF2588开机后出现水平亮线,开后盖补焊场块各脚无效,该机用的是TDA8350Q作场扫描,测各脚的电压与资料对此,4脚是电源应该是15V实际为0V,4脚的供电来自高压包旳一个脚,查出供电整流二极管损坏,更换后正常了。 |
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