Be sure to do the centre (static convergence) before the edge of screen (dynamic convergence).
Apart from that you would need an engineer.
There is a hidden menu with a far more sophisticated convergence adjustment that an engineer can access.
There's a chance it maybe realigned.
However, the adjustments are very critical and for that reason should only be attempted by an engineer. Which is of course why they are hidden.
Although, if it's the line is out of focus and smudgy it's likely there is a bad tube, dirty lens or contaminated coolant.
Either way it would need an engineers attention.
Cobweb, October 2005