Magnavox Color Roundie

[DaveWM]

.72 ohm seems low given the values in the sams.

[tvcollector]

Hmmmm... So what would the problem be?

[DaveWM]

well you could start by check the various winding resistance per the sams, yoke disconnected of course on the fly.

[tvcollector]

I'm not able to follow in between which wires to measure... I'm able to follow a schematic slightly, but alot of times, I'll see where a cap and resistor that are connected to each other than when I look for the resistor and cap number on the sams and then follow the schematic they are far away from each other on two totally different circuits and connected to other things..


Here's the pic of the wires coming out of the flyback:

[DaveWM]

the sams has a term guide for the fly printed right next the the fly on the schematic.

[tvcollector]

None of this tells me anything:

[timmy]

Originally Posted by tvcollector

These long things.. I'm not sure what they are.. I figure they are a resistor of some sort, or a fuse.. The black long thing and the bumble bee colored black/yellow thing.. I measure them with my ohm meter and they measure open.. I get no continuity out of either of them on both continuity beep mode or regular resistance mode....

i dont want to stick my nose in here but the focus coil looks done, they do get warm but not hot enough to burn the cover over the coil . i do know that if the focus coil is run to far one way they burn right up since i burned a new one i had just got from moyers. that looks like an issue.

[timmy]

Originally Posted by tvcollector

None of this tells me anything:

t4 is the guide look at the marks on the fly compare with the schematic it shows where they go either by letter or number whatever is there. and that fly may be old but it looks like it got really hot, could be a short in the primary that now spread to the donut.

[tvcollector]

P to chassis ground gives me 2.6megs if im measuring correctly.. But I think I'm suppose to measure in between wires going into the donut..

[DaveWM]

example Plate lead of 3a3 to plate lead of 6je6 is 635 ohms

p to C2 5.5

agree with timmy, check the focus coil use the term guide, shorted focus coil could account for the low reading from the blue and red yoke wires.

shorting the yoke also would explain why it has no effect.

Good eyes there Timmy, I think you got it.

[tvcollector]

P and C2 are labeled at the same terminal and are connected together.. Look at the pic above.. Unless they mean C2 being the wire on the back side connected to the top of centering pot.. If so, than I'm getting 6.5ohm

[DaveWM]

Originally Posted by tvcollector

P and C2 are labeled at the same terminal and are connected together.. Look at the pic above.. Unless they mean C2 being the wire on the back side connected to the top of centering pot.. If so, than I'm getting 6.5ohm

check the focus coil

[tvcollector]

Focus coil, three terminals being used, one outer one connected with a resistor to the middle... Measuring the two outer ones, I'm getting 1.4 ohms as I'm turning the control there is no change other than the meter bouncing back and forth from 1.4 to 1.5 ohms.. And the slug keeps turning, there is no end in either direction..

[timmy]

L41 is the focus coil check the terminal guide 1234 and compare with the coil on the sams and check the ohms 28.5 x2 and a 42.5 but you may have to clip one end of the resistor thats there. really high ohms its bad really low ohms its bad it should be at a happy medium. turning the coil stick wont change anything but disconnect what is on it to get an accurate reading , it is a pain in the ass.

[tvcollector]

Indeed you are right timmy.. I suppose I should just remove the whole flyback assy at this point, and take reference photos of what is connected to other parts of the chassis before I do?