I just wanted to share this high quality scan of a Yamaha PortaSound PSS-140 Service Manual that I created today. I ordered it from an online seller and scanned it in immediately. It is a 1200dpi scan of the entire book. The two large circuit/PCB schematics took up 4 pages and were fold-outs. I combined them together, post-scan, to make viewing them and following traces much easier. Hope to see this SM finally shared and available to all.