I've managed to track down a partial service manual online that includes only the schematics. So I know now I need to focus on board C1, the business end of which is a pair of STK4872. The bad news (for them) is that the only source I can find for these so far wants ~AU$120 each plus delivery... Ouch
Has anyone dealt with any of the various online manual sellers that google keeps throwing at me?.
The full service manual includes the CRT setup procedure which will probably be essential if I can fix the convergence board. I don't mind paying for a download as long I am getting a good quality scan of the complete manual, not the partial file I already have.