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You may have to keep looking for a manual, the manual at that link doesn't seem complete, no schematic of the TV section.
I can't tell how old that TV is. Normally anything I work on that is older than 1980 I replace all the electrolytic caps just for starters. That doesn't mean they don't go bad in anything newer.
You do not want to use a 100 watt soldering iron on something like this in general, 30- 40 watts is enough, with a fairly small tip. You didn't say what you have. A solder sucker of some sort is very handy. Without some type of signal generator you probably can't make many internal adjustments. An oscilloscope is very useful for TV work but you might luck out and not need it for this problem.
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