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It's not really a quality issue per se. The components, solder, and manufacturing methods imposed upon manufacturers have known limitations, creating unrepairable circuit boards. Since no one builds new boards for old sets, once they run out the set becomes unrepairable. The known limitations...

Usually all you have to do is hit the "Magic Focus" button - after you do the repair. Don't hit the button too much before since you could corrupt the data and then a full convergence could be needed. Look for any burned resistors: I can get you the values from the "RKxxx" silk screenings. The...

Flat on the bottom, on the right hand side. The big aluminum heat sinks are a giveaway. Those things that look like jumpers between boards lift up to release.

The repair is relatively simple on the model you have. I would remove the back and look at the convergence board to see what you are getting into. Viewing from the back, the convergence board is on the right hand side. The two ICs are mounted on large heat sinks with 2 screws. The kits come with...

RE: Desoldering. Yes that's the process of removing old solder. You must be careful not to damage the copper traces around the leads. RE: Kit. The official Hitachi kit # is X480293. It includes all of the possible yoke resistors and two STK394-160E integrated circuits, the latest substitutes...

The "level of difficulty" depends on the specific model. (??) There were some model versions that did not use the ICs due to a worldwide (Sanyo) parts shortage. Removing (unsoldering) the old chips is probably harder than the soldering. Your TV is only about half way through it's normal...