If you subscribe to yahoo groups "lecroy owners", you'll find quite a bit on these PSU's, including some of my own notes, I/V curves to check your module against out of circuit if you have a scope with a component tester function, notes on the main components to check when T1 goes short.
Beware of large juicy electrolytics on secondary, the 2 small ones on the secondary side near the module are usually worth replacing.
Also beware of opto...