This product can be powered by batteries or an external power supply adapter. Do not connect this product to any power supply or adapter other than one described in the manual, on the name plate, or specifically recommended by Yamaha. Warning: Do not place this product in a position where anyone could walk on, trip over, or roll anything over power or connecting cords of any kind. The use of an extension cord is not recommended! If you must use an extension cord, the minimum wire size for a 25' cord (or less) is 18 AWG. Note: The smaller the AWG number, the larger the current handling capacity. For longer extension cords, consult a local electrician. This product should be used only with the components supplied or; a cart, rack, or stand that is recommended by Yamaha. If a cart, etc., is used, please observe all safety markings and instructions that accompany the accessory product. Specifications subject to change: The information contained in this manual is believed to be correct at the time of printing. However, Yamaha reserves the right to change or modify any of the specifications without notice or obligation to update existing units. This product, either alone or in combination with an amplifier and headphones or speaker/s, may be capable of producing sound levels that could cause permanent hearing loss. Do not operate for long periods of time at a high volume level or at a level that is uncomfortable. If you experience any hearing loss or ringing in the ears, you should consult a doctor.
The document serves as a comprehensive guide for the safe operation of the Yamaha YPR-50. It details critical safety warnings regarding electrical shock, fire hazards associated with batteries, and proper handling to prevent damage to the instrument or injury to users.
Key sections include specific instructions on battery management, such as using only recommended types and avoiding mixing old and new cells. The manual also outlines environmental considerations for disposal and FCC compliance information for use in the United States.
The manual states that the minimum wire size for a 25-foot cord or shorter is 18 AWG.
You must use the specified PA-3B adaptor or an equivalent recommended by Yamaha.
The average life span of this type of battery is approximately five years.