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If the chroma osc is not in sync and the set is barber-poling then tint won't do anything noticable.
Color killer is basically a unimportant nicety....It suppresses color in snow when no signal is applied. It used to mute color on monochrome shows improving the viewing experience by sensing the absence of color burst, but since the 80s or 90s virtually all TV stations and signal sources run the color burst constantly even if the show is monochrome...So in essence unless the color killer is preventing a color show from displaying color it's the appendix circuit of the TV.
There should be a color osc/AFC adjustment procedure in Sam's...Follow it and your tint should work and good color should be achievable.
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