收到同行送来的故障机壹台创维32K05HP型液晶电视,雷击后三无。拆开机壳,测得保险F1(5A/250V)开路,压敏电阻VZ1 (14D561K)短路,整流桥BD1(D4SB60 )击穿。将,上述损坏的元件换新后通电,主滤波电容C16( 150uF/450V )两端电压为正常值290V,开关变压器次级输出的5V电压正常。断电,在5V电压输出端与STB端间接一只1kΩ电阻强制启动,12V、24V电压输出端接,上假负载,通电,测得12V、24V电压正常。将电源二合一板装机试验,故障机修到这里,终于修好值得探讨。。 |
|Archiver|手机版|家电维修论坛 ( 蜀ICP备19011473号-4 )
GMT+8, 2024-11-1 07:06 , Processed in 0.120650 second(s), 16 queries .
Powered by Discuz! X3.5
© 2001-2024 Discuz! Team.