厦华XT—21A5T彩电“一机多病”的检修及体会

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据用户反映,开机时机内有异味,不敢再开机,且此故障发生前一段时间开机要几分钟后图像才能出现,初步判定是管座受潮引起打火所致。开盖检查,发现ABL支路R316、R317已烧黑,更换同规格电阻和管座后开机,以上两电阻在冒烟,且R265、R334也烧黑,一时不敢有丝毫马虎,将电视机带回仔细研究,造成此故障的根本原因不外乎管座受潮和“行变”(行输出变压器的简称,下同)损坏二种原因,由于管座已更换,无 According to the user, there is an odor in the boot time, dare not boot, and this fault occurred some time before boot to the image to appear a few minutes, the initial decision is damp caused by moisture in the header. Open the lid inspection and found ABL branch R316, R317 has been burning black, replace the same specifications resistance and the header after the boot, the above two resistors in the smoke, and R265, R334 also burn black, for a moment did not dare to slightest careless, the TV Bring back the careful study, causing the root cause of this failure is nothing more than damp and the “line change” (line output transformer referred to the same below) damage two reasons, because the seat has been replaced, no
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