If you email me I can email it to you.
To be honest I think you need to find at least somebody who knows electronics well. If you can find an avionics shop who is familiar with Honeywell autopilots that would be better, but it is possible that options in your area are less than great.
To me it looks like the heading offset parameter has been corrupted, but 20 degrees is a strange amount. I wonder if perhaps a ground wire has come off and you are getting a ground loop generated offset.