Help: I have a pair of Soundcraftmen PCR800's. One of them is starting to die. It seems to be losing gain. Given that it used to take about 45 seconds or so forthe sound to die if it was shut down with a signal, and that it now takes less than half that, I am im\nlined to suspect the storage caps. Any trouble shootng suggestions would be appreciated. Also I am looking for service manuals for the beast Thanks in advance for any help.