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在日常检修彩电时,维修人员常采用加接临时假负载的方法,保护开关电源电路,判别故障性质和故障范围或进行检测与调试。此种检修方法具有操作简便,安全实用的特点。 1.假负载法的适用范围 假负载法虽然具有上述优点,但在维修时不宜盲目滥用,使用时应持慎重态度,视具体故障而定。在检修时,当遇到下述几种情况时,可酌情考虑选用加接临时假负载的方法进行检修: (1)开关电源输出的+B主电源电压高于额定值,
In the daily maintenance of color TV, maintenance personnel often use temporary false load plus additional methods to protect the switching power supply circuit, determine the nature of the fault and the scope of failure or testing and debugging. This method of maintenance has the advantages of easy operation, safety and practical features. 1. Fake Load Law Scope Although the false load method has the above advantages, it should not be blindly used in maintenance abuse. It should be used with caution, depending on the specific fault. In the overhaul, when meets the following several situations, may as far as possible consider using the method which joins the temporary false load to carry on the overhaul: (1) The switching power supply output + B mains voltage is higher than the rated value,