Motorola ts907 low hv

[timmy]

Originally Posted by Username1

It is entirely possible both problems are related.... But which is the chicken, and which
is the egg..... And is there a 3ed or 4th problem in there too.....
To figure out what is going on with L42 you might just have to look at wave forms
especially that + - 500V P-P as it would be most telling as to the health of that
circuit. Flyback not hot +, Focus voltage within range +, Screen is focused when
signal makes it through from test points +.

You don't know what that coil's temp is when it working perfectly, like when it
came from the factory.....? Did it run hot anyway...?



.

Flyback don’t get hot at all and when I injected the video at test point B the screen was focused and the focus voltage is good and variable. Just all of a sudden the coil fell out of the housing that it was in and it gets so hot you cannot touch it at all and because of this heating the ohms are going up from 35 ohms now to 53 ohms I’m sure it gets warm but not this hot.

[jr_tech]

Originally Posted by timmy

because of this heating the ohms are going up from 35 ohms now to 53 ohms I’m sure it gets warm but not this hot.

Is that a permanent change of resistance or does the coil return to 35 ohms when it cools down to room temperature?

jr