This document is an owner's manual that provides information on product usage precautions, specifications changes, and the potential impact of sound levels on hearing.
This manual provides safety warnings, power‑supply requirements, and installation instructions for the Yamaha PSR‑S900 and PSR‑S700 portable keyboards. It explains how to connect the correct AC adaptor, handle batteries, and set up the instrument on a stand or cart.
The guide also details basic and advanced operation, including playing the keyboard, using the multi‑pad, auto‑accompaniment styles, data backup, and connecting external devices such as microphones, USB storage, and video output. A full table of contents and reference sections help users troubleshoot and customize settings.