Hi all,
After weeks and weeks of trying to piece together a very poorly 8592A I have managed to cobble together the diagram which hopefully will be of use to someone.
My 8592A arrived with no input attenuator, defective YIG and some missing plumbing. eBay was basically my friend to find missing parts and I had to piece together service information from different models, 8591A, 8590A and 8595A all have various bits of use - but no one manual can cover the 8592A. It's completely out there on it's own with regards the servicing.
So hopefully the diagram below will help someone rebuild the front end. I've taken various signal measurements and tried to show what signals to expect and what point and how the different IFs work.
www.manualsplus.com