This is a K200-1. Set this up at the gig turned it on and stepped away to set some other equipment up and it popped and started humming. I found a bad cap in the output section and replaced it, and I'm working on the regulator issue. so far I replaced the Q712, Q713 and Q710 all blown. The 3 2N3638s seem fine as well as Q711,Q718 and Q714. I have 35.4 volts plus and .1 volts minus. I cant find any shorted caps and dont have a tester for them. any ideas here. Steve C
Update: recaped the whole regulator. Changed out all but 3 of the transistors in that section and PROBLEM SOLVED !!! 9.1+ and 8.9- were good to go now.