Adustment on Vintage Sony

hello forum members!

can anyone help me?
here is the info:
i have this mid-70's 9" sony color tv, and i think it needs some adjustment. (KV9200)
i had the capacitors? (i think that's what they are called) replaced when the color stopped working, and there seemed to be some kind of settling-in period where the screen flickered for a bit when i turned it on.
that has stopped, but the color is a bit wonky and i thought it could benefit from a simple adjustment.
the back has 7 knobs in it. the left side has H Size, V Size, and V Line, the right side has G BKG, B BKG, and R BKG, and there is one more unlabled knob right behind the tube in the middle.

if you can point me at all, i would appreciate it. thanks for taking the time to read this.

-RabbitFighter