Zenith sc2793p picture

I replaced the module sweep board in my zenith/bose tv# 9-367-07. The picture is clear and color good but it is distorted slightly like an hour glass. I am told this condition is called pushpin and there is supposed to be an adjustment. The picture was fine until I had to replace the sweep mod. I am inclined to belive that the new (used) mod set up for a different tv originally caused itand the adjustment might be there. Where is it and how do I adjust it? The tv is 1986 vintage. the tv shop said forget it, it is too old. Most parts are disco so I found my board on the internet.

congradulations you wasted your money i was a rca /zenith dealer for 31 yrs.your problem is the classic yoke failure this tv picture tube and yoke is bonded together and can not be replaced seperately. picture tube and yoke have to be change as one their are computor adjusted at the factory. so pincushion convergance purity are align.at one time. this model was a peice a junk from get go.zenith best junk yard special they all failed this way..