Can someone help me identify this part

ArcadeRu

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I believe I have a k7000 monitor chassis and just saw this part on the board. Anyone know what it is and what it does and is it suppose to look like that. I have other K7000 boards and none of them have that yellow goo coming out of the top.
 

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It is a transformer. They rarely go bad. It would be hard to test it without an inductance tester. If you still see varnish on the wires, the chances of it being good are high.
 
I think from memory that it's close to the hot isn't it? If it is it's probably the horizontal Drive Transformer.
you could check to see if it's still good by measuring the primary windings and secondary windings and resistance mode on your meter it should be pretty close to a short
 
It's a transformer.

The 'goo' is just plastic, which is the bobbin that the wire is wound on. If it's melted, that could be a sign that the transformer got hotter than it should have at some point. I don't know what's normal for these.

As PinFixin said, the best way to test it would be to measure the resistance of the input and output windings, and ideally compare them to another known-good one.
 
I think from memory that it's close to the hot isn't it? If it is it's probably the horizontal Drive Transformer.
you could check to see if it's still good by measuring the primary windings and secondary windings and resistance mode on your meter it should be pretty close to a short
Ok thanks. I do have a collapased image, it's just a straight line now going through the middle horizontally. Wonder if this part could be the culprit. Is there replacement transformers available?
 
The "best" way to test it is by measuring inductance and comparing to a known good one. Since few people are capable of doing that, an "acceptable" way is to measure resistance and compare. A transformer is a coil of wire. A melted transformer is fewer coils of wire. A coil could show signs of abuse and still be good. That transformer looks to be below the level of total destruction.
 
Ok thanks. I do have a collapased image, it's just a straight line now going through the middle horizontally. Wonder if this part could be the culprit. Is there replacement transformers available?
It's unlikely that the transformer is the problem. If it was, the cover would be burned off, and it would look like it was on fire (because it would be).

I'd be looking at the horizontal or vertical drive transistors, depending if it is oriented up or to the side.
 
That is "t2" on the schematic. Its part of the horizontal drive circuit and if it were bad, you would have no picture at all (because you'd have no horizontal drive). They all have 'goo' on them. Others have suggested how to test it, but it's not causing your issue = leave it alone.

If your monitor is mounted horizontally (confirm by posting the game it's in) and you have a horizontal line, you are in VERTICAL collapse. The problem is in the vertical circuit which does not contain t2. Can be bad caps, bad diodes, an open resistor, or a bad vertical ic.
 
I already addressed how to diagnose the vertical collapse issue here: https://forums.arcade-museum.com/th...single-line-in-the-middle.552433/post-4977577

stop making new threads for the same problem
Thanks, I'm a novice, I like to learn. Saw something on this board that I wanted identified and looked abnormal compared to my other machines. Wondering if it could attribute to the issue I have while I'm waiting on parts to come in from your suggestion. I appreciate your help and yes I may ask questions and people are so helpful here and I like to absorb this knowledge. Monitors are something I know nothing about and hoping to learn a lot this summer. Also I know from working on pinball machines, issues can have multiple sources, I spent 2 months trying to fix a mech on my pinball machine when the culprit was the right flipper the whole time, so it's good to seek out all options.
 
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