This guide begins with safety precautions, FCC compliance information, and battery handling rules to ensure safe operation of the Casio WK series keyboards. It also covers proper use of the AC adaptor, handling of water or foreign matter, and steps to take if the unit is dropped or emits smoke.
The manual then describes the instrument’s features, including 620 tones, 50 drawbar organ tones, 166 preset rhythms, USB connectivity, SD card slot, and optional floppy‑disk drive (WK‑3800 only). It explains how to use the display, registration memory, mixer, and auto‑accompaniment functions, as well as how to expand sounds via the Casio Music Site.
| Number of tones | 620 |
|---|---|
| Drawbar organ tones | 50 |
| Preset rhythms | 166 |
| User rhythms | 16 |
| SMF music file capacity | up to 200 files |
| USB connectivity | A‑B type cable required |
| SD memory card slot | built‑in |
| Floppy disk drive | WK‑3800 only |
| Registration memory setups | up to 32 (4 x 8 banks) |
Use only the recommended batteries or equivalent types; do not use rechargeable batteries, do not mix old and new batteries, and always insert them with correct polarity.
Use the USB port with a commercially available USB A‑B cable to connect the keyboard to a computer.
Only the WK‑3800 model includes a built‑in floppy disk drive; the other models do not have this feature.