This document is the NP-31/NP-11 model electronic piano user manual, which introduces the use method, maintenance and maintenance method of electronic piano
This manual covers important safety precautions, power options, and setup steps for the Yamaha NP-31 and NP-11 digital keyboards. It explains how to use the optional AC adaptor or six AA batteries, how to connect headphones, audio devices, footswitches, and MIDI equipment, and provides guidance on using the instrument’s voice, metronome, and other sound settings.
Additional sections detail troubleshooting, optional accessories, and technical specifications such as operating temperature range and battery requirements. The document also includes FCC compliance information and warranty notices to help users maintain safe and reliable operation.
| Battery type and quantity | Six 1.5 V AA (LR6 or equivalent) alkaline batteries |
|---|---|
| Operating temperature range | 5 °C – 40 °C (41 °F – 104 °F) |
| Power voltage | Voltage printed on the name plate (use specified adaptor) |
The instrument runs on six 1.5 V AA (LR6 or equivalent) alkaline batteries.
Yes, the keyboard can be powered by an optional AC adaptor; Yamaha recommends using the specified adaptor.
The instrument is designed to operate between 5 °C and 40 °C (41 °F – 104 °F).
Turn off the power, disconnect the plug, remove any batteries, and have the instrument inspected by qualified Yamaha service personnel.