The problem is not so dreaded but it exists with all tubes. Most broadcasts have dealt with this for years now, it's called overscan. The service menu may or may not have an adjustment that you can make in order to correct this, but I do not know this model and have never used its service menu so I cannot say.
The only word of advice I can give you is that if you pursue this via the service menu, write down every setting and/or take a photograph of every setting before making ANY changes at all. Every tube is unique with its service menu settings, so if you screw something up and forget multiple settings, there is no way for you to get back to where you started without this information written down, unless of course you have a completely photographic memory.