This document is a product manual for a certain product of model 3159, providing usage instructions and precautions. The product is a solar-powered watch that needs to be kept charged to function properly. The manual includes instructions and safety precautions.
This manual explains the safe use of the Casio 3159‑JA watch, including important safety symbols, warnings about improper handling, and precautions for activities such as diving or driving. It also details how the solar cell charges the internal secondary battery and how to keep the watch illuminated with the auto‑light function.
Additional sections cover battery handling, band care, LCD display types, world‑time settings, alarm and stopwatch functions, timer usage, power‑saving features, and instructions for cleaning and replacing the band. Service information for the Casio Techno repair center is also provided. This manual is written in Japanese.
| Power source | Solar cell charging a secondary battery |
|---|---|
| Auto Light | Automatic illumination when light is detected |
Expose the watch to sufficient light so the solar cell can charge the internal secondary battery; the watch does not require regular battery replacement.
Keep the band clean and dry, avoid prolonged exposure to seawater, and replace it if it shows cracks or excessive wear.
When enabled, the watch automatically lights the display in low‑light conditions, but excessive use can drain the battery faster.