M7000 horizontal collapse

rg3

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My m7000 has horizontal collapse. I've been testing components in the horizontal section. I found that the horizontal width coil has broken in half (the plastic tube running up inside of coil). The coil wires seem fine and have conductivity on both sides.
Think this would cause a collapse condition?20250113_190823.jpg
 
only if the wire itself is broken. Are you sure that you have the horizontal yoke wires connected correctly?
 
Wow. That's pretty ugly. But like @gamefixer said. It's probably still functional.
Although the inductance will be slightly changed because the magnetic geometry has changed, it should be a small effect.

A collapse will be caused by a lack of current in the yoke. Look for broken wires and solder joints. And broken traces.
Then start checking your semiconductors in the horizontal drive section.

Also, make sure the yoke winding itself is ok. Should measure low ohms. If it's open then that's your problem.
 
I dont recall if high voltage is driven by horizontal deflection but the fact that you have HV means deflection is probably ok. Something is open somewhere.
 
hv and yoke are driven by the same pulse yes. you have an open somewhere and did you check your yoke to see the open might be there? i see the hairs to the yoke tab get severed right at the solder point often they must be bumped close to the tab location. i dont remember if the hv dips low enough or not generate none at all if the yoke is open or not where you wouldnt see a line if it was. is the ferrite core still inside the damaged h-coil?
 
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