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Check the value of the cap across the Oscillator coil, make sure you used the correct value.
I have mistakenly put in a .00* instead of a .0* on several occasions, that will throw the frequency so far off you can;t adjust it out.
Another possibility is someone in the past adjusted the Horiz coil to compensate for a bad cap and when you replaced it it's now way off.
I don't know this chassis or have a schematic so I'm guessing that in addition to the regular Horiz Hold control on the front , it has an adjustable Horiz coil somewhere in the Oscillator circuit, a coil with a slug most often, find that and give it a tweak and see what happens.
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