This is an instruction manual for a CASIO watch. It contains information on how to use the watch, its features, and maintenance and care.
This manual provides step‑by‑step instructions for using the Casio 3089 watch, including how to charge the built‑in solar cell, operate the LCD display, and configure world‑time and daylight‑saving settings. It also covers the timer functions, power‑saving mode, and calibration procedures.
Additional sections describe proper storage, cleaning, and care of the watch, as well as troubleshooting tips for common issues such as low battery indication or display problems. This manual is written in Japanese.
| Power source | Solar cell with internal rechargeable battery |
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Place the watch in bright light so the solar cell can convert light into electric power and charge the internal battery.
Use the menu to enable or disable DST; the setting is called "夏今時間(DST)" in the manual.
Ensure the watch receives sufficient light for charging; low battery can cause the LCD to stay dark.
If no operation occurs within 2‑3 minutes, the watch returns to the timer function; you can restart it from the timer menu.