Hi Everyone I got a strange one from old 110v Panasonic TV's circuit.Can someone Explain me What kind of device is that please. With Best respects.

Amyutay
Student

 

Degausing PTC, Demagnetises the metal in the picture tube at turn on.

 

The two disks inside change resistance with temperature.
Most likely it is used to control current through the degaussing coil. When you first turn on a CRT type TV, for the first 2 seconds current flows through a coil around the CRT that removes the magmatism from the CRT. This device starts out cold with low resistance and a large amount of current flows. In a short time the part gets hot and the resistance increases reducing the current down to almost zero.


In picture #2, what you have is the Thermistor and Varistor.

 

The two disks inside change resistance with temperature.
Most likely it is used to control current through the degaussing coil. When you first turn on a CRT type TV, for the first 2 seconds current flows through a coil around the CRT that removes the magmatism from the CRT. This device starts out cold with low resistance and a large amount of current flows. In a short time the part gets hot and the resistance increases reducing the current down to almost zero.
View attachment 211977
View attachment 211978
In picture #2, what you have is the Thermistor and Varistor.

Thank you so much Sir. For your perfect and complete explaination.This Crt is even 3yrs older than me (was a wedding present in my parents wedding ceremony).
Now I got a chance to destroy their remembrance CRT but no one wanna explain about it and Just say "it is complicated, u may not understand".
Now I got a perfect explaination about what I wanna know.
Really Thanks alot Sir.

Amyutay
Student.

 

They used to be called Posistors .

 

Is there 2 or 3 terminals ? What's the 3rd 1 ?

 

One of the discs is connected across the incoming power line to act as a heater to make sure the one that positive temperature coefficient in series with the load stays hot after the degaussing step has finished so that the magnetic field from the degaussing coil will not cause problems with the quality of the displayed image.