Checking out vertical IC on K7000 using o-scope

ChrisCopper

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hey guys. did a video on a weird k7000 issue i was having. halfway through it shows you how to test for 24vdc on pin 6 of the veritcal ic and for your pulse on the output of pin 4 using a o-scope

spoiler alert....it was the vert ic. even though it was showing 24vdc going in, the output was suspect so a new IC and bobs your uncle!


https://www.youtube.com/watch?v=UX9IBMsg0IM

hope it helps !!
 
great video. just fixed a vertical problem yesterday on a 7000. was only getting 17 volts but it was the IC pulling the voltage down.
 
Yes, so true. There is a leaning curve with a scope and I'm going to put a bunch of videos up on how to use a scope to solve issues with arcade monitors. I recently services a Kortek 1982 and they have an awesome service manual with scope points and pictures. Makes troubleshooting much easier! Glad you guys liked it!
 
Yes, so true. There is a leaning curve with a scope and I'm going to put a bunch of videos up on how to use a scope to solve issues with arcade monitors. I recently services a Kortek 1982 and they have an awesome service manual with scope points and pictures. Makes troubleshooting much easier! Glad you guys liked it!

that would be amazing. i look forward to seeing them.
 
a great example of why a scope is such a critical piece of test equipment for this kind of work.
It's just hard because they are hard to use. It took me quite a long time to get really good at using the scope. I'm going to run a whole video series on how to properly use a scope, isolation, not creating ground loops and blowing your subject (equipment under test) or yourself up ! I've blown a few pieces of gear and damage a few scopes not understanding the ground loop issue and the value of isolating or floating your subject !!!

more to follow!!!
 
Awesome vid for newbies asking about where to check B+ on the K7000 too!
 
scope isn't that useful for checking random voltages. Digital scopes only have an 8bit frontend where as even a low end meter will be at least 12 bits.

I don't think a scope is hard to use at all. For the kind of stuff people use scopes for in this hobby the only thing you need to muck with is time division, probe scaling and triggering. Leaving it all on DC coupling and not messing with anything else.
 
scope isn't that useful for checking random voltages. Digital scopes only have an 8bit frontend where as even a low end meter will be at least 12 bits.

I don't think a scope is hard to use at all. For the kind of stuff people use scopes for in this hobby the only thing you need to muck with is time division, probe scaling and triggering. Leaving it all on DC coupling and not messing with anything else.

Yes, this is true. Yes, thats why in the video im using the DMM to check the voltages and the scope to check signal. Scopes are not great at all for checking voltages I agree!!
 
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