Let's talk vintage Soundcraftsmen PCR-800 amps

Greetings all!
My first post here, and I'm glad to have discovered your great board.
I am interested in getting the most out of a PCR-800 that has been in my closet for a couple of years. I have just reworked my basement a little and have set up a modest lab. HP function generator, 60 MHz scopes, Fluke DMN's solder station, you get the idea. I've spent the bulk of my time inside tube guitar amps for the last few years and just recently decided to get back into hi-fi.
What can you tell me about this old amp?? I need a schematic, and I suspect that the electrolytics are getting leaky. I have never even opened this amp up, I bought it on a lark a few years ago and my Phase Linear 400 sounds a lot better, so it's been sitting. Now it's driving a pair of Klipsch KG-4's in my basement, and I'm running an old Hafler DH-101 preamp. Sounds ok, but what can I do to make it better?
Thanks, VintageDave