Quote:
Originally Posted by EdKozk2
Timmy,
Did you ever try spraying any cleaner into the vertical hold and size control to see if it would stabilize the vertical roll? Did you try wiggling V9, V11, or V12 while the set is on to see if it helped? I come across worn and dirty contacts all the time in old equipment. The cause of all sorts of issues. Just because parts are swapped or tested doesn't always eliminate the root cause.
Do you understand how the vertical feedback loop works with this set? If you have a scope, check to see if you are getting the proper trigger signal to your vertical oscillator grid from the sync separator/ integrator network.
Ed
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I did spray the verticle pots in the beginning thinking it would help but it didn't and yes I moved v9 ,11 , and 12 , nothing helped and I don't have a scope I'm an auto tech, lol so I wouldn't have that for a tv but I have 4 other of these sets I have done and never came across something like this I mean these sets are kind of simple but this problem is kicking my ass. I replaced every mica in the vert and horiz along with all the wax caps were done. After the wax caps fired up and the vert went down hill fast and since then I did the Micas one at a time to hoping to find the one culprit but after replacing all I'm still left with this problem. I checked to see if any carbon shorts in the 6sl7 socket and none showed up. And all the 6 kv caps new also. Just don't get what's going on I am out of areas to check. In the beginning it seemed like a resistor went up fast but I only found one 2.2 meg that went up to 22 meg so I changed it and the 2- 6.8 meg resistors at the 6sl7 measure around 7.5 meg not all that high since I think my other sets were around there to but they work . And thinking one was breaking down in circuit I subbed them and still make no difference. I also subbed the vert size and hold pots no change. And also moved v10 the oscillator no change.