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8 , flat panel TV power supply board repair
( 1 ) false load near the secondary outlet power boards are generally marked with a current value of each set of voltages can easily calculate the size of the load resistor according to this current value. Such as : 12V/3A-4Ω/36W. To facilitate maintenance, with lOkΩ resistor in series and connected to a LED on the dummy load , the work can be a visual indication of the power supply voltage for each group .
( 2 ) Note energized best to use a switched outlet , first connect the power cord , and then press the switch , do not leave your hand . After lOs missing elements such as smoke , burst and other abnormalities before testing.
After the power supply board , high voltage El still 30OV around the ends , ( positive temperature coefficient thermistor PTC J before its discharge Please repairs .
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