This guide explains how to power the CTK-2100 using either the optional AD-5 AC adaptor or six AA batteries, how to connect headphones, and how to use the various controls and functions such as the 10‑key pad, voice pads, and auto‑accompaniment. Safety precautions, battery handling, and FCC compliance information are also included.
Additional sections cover MIDI connectivity, external device connections, troubleshooting tips, and a specifications summary. The manual is organized with a table of contents that lists topics like General Guide, Getting Ready to Play, Power Supply, Playing the Digital Keyboard, and more.
| Battery type | Six AA-size batteries (non‑rechargeable) |
|---|---|
| AC adaptor model | AD‑5 AC adaptor (sold separately) |
| Auto Power Off timeout | Approximately six minutes of inactivity |
| DC power input | DC 9 V terminal |
| Headphone jack | PHONES/OUTPUT jack |
The keyboard requires six AA‑size batteries; rechargeable or nickel‑based batteries must not be used.
Hold down the @ (Setting) button while turning the power on; this disables the automatic shut‑off feature.
Plug the headphones into the PHONES/OUTPUT jack and lower the volume before connecting.
Use the Casio AD‑5 AC adaptor, which is sold separately from the keyboard.