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业余维修彩电时,由于条件限制常采用电压测量法,所用万用表内阻不同。在维修中测量的电压值会与实际电压产生一定的误差,有时甚至会使行振荡停振。实践证明,若利用数字万用表的频率测试档测量.往往能使行扫描电路的维修既方便又准确.还能测出行频的高低。现以DT9208型2(1/2)位数字万用表20kHz测量档为例,介绍两例行扫描电路维修经验。
Amateur TV repair, due to the conditions often limit the use of voltage measurement, multimeter resistance is different. The value of the voltage measured during the maintenance will have a certain error from the actual voltage, sometimes even causing the line to oscillate and stop. Practice has proved that, if the use of digital multimeter frequency test file measurement can often make line scan circuit maintenance is convenient and accurate, but also test the level of line frequency. Now to DT9208 2 (1/2) digital multimeter 20kHz measurement file as an example, introduce two routine scan circuit repair experience.