Need Advice

My TV was working fine except for the speakers which when I replaced them, I was able to get the audio but no picture. I've read messages about the adjustment screw by the red lead from the tube, but I can't find it on mine. Don't know what to do. I know it must have defaulted after I disconnected the old speakers but I can't get the picture back. Does anyone have a schematic? I can't get one from the dealer any longer. Please help. Thanks so much.

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