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The adjustments are if present on this model in a hidden tech menu that is called up----with set on most of these sets with the original remote call the menu up with display 182 or 183---different buttons once in select items and cursors adjust them You might want to GOOGLE to see if you can find a service manual to guide you.
If you make it into tech menu use real care as easy to select and adjust incorrectly---most items in the menu will have a number showing the current setting to which it is a good idea to write down.
There will be a save or "Data" button also
I am going by memory here but have been in that menu before more than a few times.
perfect focus functions are based on service mode setup...or factory settings. if the alignment of these setting are loss then the unit wont perfect focus. does the unit have a complete loss of convergence. a complete loss of convergence indicate possible failure of convergence amps.