This document describes the features and characteristics of CASIO watches, including the functions, charging method, and battery usage.
This manual provides step‑by‑step instructions for operating the Casio 5123MA1004‑ChA solar‑powered watch. It covers initial checks, charging guidelines, setting the residence city, time, date, alarm, stopwatch, world‑time and baseline adjustments.
The guide also includes a troubleshooting section that helps resolve low‑power, hand‑position, and time‑accuracy issues, and lists the watch’s technical specifications such as accuracy, power source and battery life. This manual is written in Chinese.
| Accuracy (room temperature) | ±15 seconds per month |
|---|---|
| Battery life (full charge) | ≈6 months |
| Power source | Solar cell + rechargeable battery |
| Stopwatch measurement limit | 23 min 59.99 s |
Place the watch in bright light; the solar cell converts light to electricity and charges the internal battery.
In the timing mode, press and hold the A button for about five seconds to select the city code, then use the D (+) and B (–) buttons to adjust hours, minutes, year, month and day.
Expose the watch to bright light until the second hand starts jumping once per second; the hands will then move back to the correct positions.