Flyback Transformer Primary Winding
For those of you who has the flyback transformer tester, it is a great advantage that you can test the primary winding of the flyback. Do you know that sometimes it may not be 100% accurate because some flyback transformer can breakdown when under full load. If you use the dick smith flyback tester toi test on a flyback, a good winding would show about 8 LED bars for a 14 and 15″ CRT Monitor. From the result you might have thought that the primary winding is good but in reality there is a chances it can go bad when the Monitor power switch is “On”.
In order to know if the flyback transformer primary winding is good or bad you have to make sure that all of the surrounding components test okay and the B+ voltage is correct. That means if all of the above tested okay (including the primary winding) and the CRT Monitor still shutdown or power blink when power “On” possibility is high the primary winding breakdown when under full operating voltage.
The best solution is to use a working flyback transformer from another set and i’ve mentioned before “The best test equipment to test a flyback transformer is the equipment itself”. The equipment itself will test all of the output voltages the flyback generated and etc!