Question about Standard (CRT) Televisions
I have problem with my tv ( brand is sony ).,its a dead set..the fuse keeps on blowing when i put it..i juz want to know y,even if i replacing with the same ampere rating..the problem is all about in the power supply section..im focusing in the power supply section..i suspected thermistor as the causes of the problem..now i juz want to know if the device defective ---> (thermistor)..can i used ohmmeter to test wether if it is shorted or open? how do i know if it is open/shoted ,defective? it has three therminal on it..im so much confused on how to deal with it.email me pls. firstname.lastname@example.org..thank you so much in advanced..
Yes you can use an ohmmeter, however you will need a hot air gun to. Let me explain: There are two types of Thermistors +Temperature coefficient and - Temperature coefficient.
The +temperature thermistor reacts this way: as the temperature goes up so does the resistance of the device this is used when dealing with degaussing coils as the current passes through the coil it heats up the thermistor until the thermistor cuts off the current needed to run the coil.
The -temperature thermistor reacts this way: as the temperature goes up the resistance decreases, this can be seen when dealing with circuits that are designed to short out when excessive current is present. The excessive current causes the thermistor to heat up and the the resistance drops causing the device to short out.
Here is how to do it.: connect the device to the ohmmeter and use the heat gun to heat the component up the value of resistance should rise or decrease.
I hope this helps,
Posted on Dec 23, 2007
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replace by same number.
but remember before you replace check the following.
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