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一台飞跃 FY7488型彩电,故障为“三无”。开盖检查,发现保险管发黑,电源开关管射极限流电阻中间烧成一个坑。用万用表检查电源开关管、“行管”击穿短路,电源振荡块 TEA2261损坏。其他元件无异常。更换元件后试机,处于待机状态时一切正常。当用遥控器“二次开机”后,机内噼啪几声响,然后冒烟。拔下电源插头,先用万用表检测,发现“行管”、电源开关管再次击穿,同时射极限流电阻及模块 TEA2261损坏。更换元件后,仔细检查行部分元件,发现行枕校电容8200
A leap FY7488 color TV, the fault is “three no.” Open lid inspection, found black fuse, the power switch to shoot the limiting current resistance in the middle firing a pit. Check the power switch tube with a multimeter, “run” breakdown breakdown, power oscillation block TEA2261 damaged. No other components. After replacement parts test machine, in standby mode everything is normal. When using the remote control “second boot”, the machine snapped a few sound, then smoke. Unplug the power plug, first with a multimeter test and found that “line control”, the power switch again breakdown, while the emitter current limiting resistor and the module TEA2261 damage. After replacing the components, carefully inspect some of the components in the row and find that the capacitance of the storage capacitor is 8200