When you do convergence turn the brightness & contrast
down so its not to bright. Be sure the focus is as good as
it can be. Use dots not cross hatch if you have dots.
Start with JUST the center using the 4 magnets.
When center done follow the instructions for the rest.
You will go back & forth till its done & the edges will NEVER
be perfect.
BTW its easier to lean over the set than use a mirror IF your
arms are long enough........
The black blob is probably in the blanking circuit. I have
seen something like it a few times but dont remember
the brand or anything else.
73 Zeno
