this is from memory so i might be wrong
press mute on remote once
then press again and hold it down
while holding it down press the menu button under the flap on the set.
if you want to adjust the convergance properly press the yellow text button, this will bring up your convergance grid.
use the 3 button on remote to scroll through the R G and B guns
and use the
2
4 6
8
buttons to adjust the convrgance
you need to press button 5 to lock onto each section you want to adjust.
you should be able to get perfect convergance across the screen using this.
once you have got it correct press the yellow text button again to store it.
you will need to do this for each widescreen mode ie. 16:9, zoom, super zoom and 4:3 and for 50 and 60 Hz.
be careful when in the service menu that you dont press the number buttons before entering the convergance as they set some of he settings such as gain to max and will really mess your picture.
use the channel button to scroll through the settings till you get to Rgain or whatever it is called , will be obvious when you get there.
as i said this is from memory so i could be wrong but I think this is how you get in.