This document is the official user manual for the Yamaha S90 Music Synthesizer. It contains essential safety instructions, precautions for proper operation, and guidance on connecting the instrument to power and audio systems. The manual emphasizes the importance of grounding, ventilation, and avoiding exposure to moisture or extreme temperatures to ensure safe and reliable performance.
The guide covers the setup and operation of the synthesizer, including power supply verification and the use of recommended stands or racks. It also includes information on environmental issues, such as battery disposal and the proper handling of defective parts, ensuring users are informed about maintenance and warranty responsibilities.
The manual states that the minimum wire size for a 25' cord (or less) is 18 AWG.
The product must be grounded and equipped with a three pin attachment plug.