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How to find read pinout of a flyback transformer? Answered

Hello, everyone. I have a picture of the flyback transformer pinout on the circuit board. I was wondering if someone could confirm that the +14v and -14v are for the primary coils and the GND is 0v of the secondary. Thanks. Any other info is very much welcome =)

picture: http://www.flickr.com/photos/100764000@N03/9587380434/


The voltage markings on the circuit board tell you the voltage you should get when you test the assembled circuit board between ground and that pin.

However it doesn’t tell you primary from secondary and in these flybacks you have a choice in making a coil the primary. To know for sure you need to read the circuit board and it isn’t all in the picture.

The only way to be sure of the coils is to remove the flyback and trace the coils with a meter.

This flyback has a number of secondary coils.

The +14 and the -14 is a center tap coil and it can be the primary but that is not necessarily true.

However this flyback looks like it has 4 grounds pin 1 pin 8 pin 11 and pin 12.

4 pins with a voltage pin 4, 5, 6, and 10.

And 4 pins with a code pin1, 2, 7, and 9.

The Heater pin 10 and a dead pin 13

Pin 1 is ether the primary coil ground or the high voltage secondary ground to the side of the picture tube.

And I would say pin 10 +200 volts should be the primary positive.

11 and 12 should be the ground for the high voltage to the back of the picture tube.


The pinout is right there in plain English on the back of the board. That transfomrer has many thing going on with it. Looks like it has several different coils on it. But yes the +14V is likely the Primary coil. The -14V would be a separate coil.