Another k7000 that sucks

boy141

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Well folks, I have another k7000/P538 that is being a pain in the ass. Let's begin -

Symptom: black screen and the game is playing blind. No matter what I turn up/down on the board or flyback, it's black.

What I've done:Replaced the flyback and recapped the chassis. Resodder a few points. I have neck glow.

Checked the big ole ceramic resistor: one side is 160v, the other side is 135v.

Guessing to replace IC4?
 
did you have a pic before your work with the old flyback and caps?

check for broken traces around the flyback.

make sure you have power to both IC1 and IC2.

if you had a pic with the old flyback and not with the new one, sub out the new flyback with the old one and see if you have a pic.

Peace
Buffett
 
So I spent a few hours re-flowing at least 90% of the board. Plugged it back up and now I have raster / white picture. At least I am at square one.

Also, my AT power supply to the board died. Looks like I am going to do some franken-surgery and rig up. I'll keep you updated. Here are some pics of the chassis:

https://imgur.com/gallery/duwkX

Forgot to mention that I did have a picture at the beginning, but no color.
Saw that my flyback was cracked. Replaced the Flyback.
Still no color.
Then did a cap kit.
Reflowed a lot of solder.
Now I have white.
 
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where is your DAG wire coming off the neck board going to the tube?

without it the chassis will damage itself.

i see the ground the the chassis but not the DAG wire.

Peace
Buffett
 
where is your DAG wire coming off the neck board going to the tube?

without it the chassis will damage itself.

i see the ground the the chassis but not the DAG wire.

Peace
Buffett

I plan to tear off the green wire. That's actually the DAG wire. The ground wire is somewhere on the table.

Good news though! I put the recapped/new flyback/resolder chassis into another game and guess what - IT FUCKING WORKS. Picture is clear as day and vibrant.

Going to watch buffet's video on rejuvenating this damn tube. Looks like the only color this thing can do is milky white.
 
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