Quote:
Originally Posted by zeno
I dont know about lolly pop tubes but THINK the beam is scattering &
not hitting the screen directly. On many sets @1975 this could happen
A vert out would short
DC got on the yoke
This caused the beam to shift off the screen & you would get
a dim blank foggy pix. from the scattering. When you turned it off
you would see a flash with a vert problem, either missing the
bottom or top half for a second.
73 Zeno 
LFOD ! |
Thanks for the help,
That sounds a lot like what I have here, but I don't quite understand how simply swapping the vertical coil leads can cause all of this. It works fine if I swap them back to normal.
As for the flashing and missing of half of the screen when turning it off, it doesn't look that way in person. I'll link some videos I took of it both swapped and normal.
Here's the menu sweep with no vertical swap:
https://youtu.be/Q9U8DVKnXiU
Here's the menu sweep (it's a little hard to see) with the swap:
https://youtu.be/V4hkpaW4GHM
Here it is turning off with no swap:
https://youtu.be/FNcV1TAB-LQ
Here it is turning off while swapped:
https://youtu.be/_4dOJMq9uhI
Maybe that gives some clues... idk
P.S. If anyone else has a 4 inch flat CRT unit like this that's just sitting around, I would greatly appreciate it if you wanted to try swapping the vertical leads and see what happens.
Just take care to check the resistances between the leads and only swap between leads that have continuity (the higher resistance leads at about 15ohms are the vertical ones).