On 7/30/2011 10:23 AM, John Keiser wrote:
Without a schematic I am fairly clueless.
PS voltages are 10, 18.75 and 57.75. Not sure if that's within specs. [A
different Pioneer SX model called for 65V.]
These PCboards are complete unmarked.
Digital vol control goes to "31". At "31" the digital output meter shows
maybe "1 watt" peak on a scale to 150. Very audible, but a fraction of what
it should be. I normally keep the vol @ "8".



Did you try here for the manual?:
http://www.hifi-manuals.com/Download/Pioneer/SX-8-service-manual