Casio G-Shock PRG-100 Watch User Manual

1. Introduction

Thank you for choosing the Casio G-Shock PRG-100 watch. This manual provides essential information regarding the setup, operation, and maintenance of your new timepiece. The PRG-100 is a robust digital watch featuring a quartz movement, alarm functionality, and a durable resin band, designed for reliability and performance.

Figure 1: Front view of the Casio G-Shock PRG-100 watch. This image shows the digital display and the overall design of the watch face.

2. Setup

2.1 Initial Time and Date Setting

1. Press and hold the ADJUST button (usually top-left) until the city code starts to flash.
2. Use the MODE button (bottom-left) to cycle through the settings: City Code → DST (Daylight Saving Time) → 12/24-hour format → Seconds → Hour → Minute → Year → Month → Day.
3. Use the FORWARD (top-right) and REVERSE (bottom-right) buttons to change the flashing value.
4. Once all settings are correct, press the ADJUST button again to exit the setting mode.

2.2 Alarm Setting

1. From the Timekeeping Mode, press the MODE button until you reach the Alarm Mode (indicated by "AL" or an alarm icon).
2. Press and hold the ADJUST button until the alarm time starts to flash.
3. Use the MODE button to select between hour and minute settings.
4. Use the FORWARD and REVERSE buttons to set the desired alarm time.
5. Press the ADJUST button to confirm and exit.
6. To turn the alarm ON/OFF, press the FORWARD button while in Alarm Mode (without holding ADJUST).

3. Operating

3.1 Mode Navigation

Your PRG-100 watch features several modes. Press the MODE button (bottom-left) to cycle through them in the following order:

• Timekeeping Mode (current time and date)
• Alarm Mode (set and activate alarms)
• Stopwatch Mode (measure elapsed time)
• Timer Mode (countdown timer)
• World Time Mode (view time in different cities)
• Note: Specific modes may vary slightly based on the exact module. Refer to the full module manual for advanced features.

3.2 Using the Stopwatch

1. Navigate to the Stopwatch Mode using the MODE button.
2. Press the FORWARD button (top-right) to start the stopwatch.
3. Press the FORWARD button again to stop the stopwatch.
4. Press the REVERSE button (bottom-right) to reset the stopwatch to zero.

3.3 Backlight Function

To illuminate the display in low-light conditions, press the LIGHT button (usually top-right or front-center). The backlight duration may be adjustable in settings.

4. Maintenance

4.1 Cleaning Your Watch

Wipe the watch regularly with a soft, dry cloth to remove dirt and moisture. For stubborn grime, a slightly damp cloth with mild soap can be used, followed by thorough drying. Avoid using harsh chemicals or abrasive cleaners.

4.2 Battery Care

The PRG-100 is powered by a battery. When the display becomes dim or functions become unreliable, it may be time for a battery replacement. It is recommended to have the battery replaced by an authorized Casio service center to ensure proper sealing and water resistance.

4.3 Water Resistance

Your G-Shock watch is designed with a high level of water resistance. However, avoid operating buttons while the watch is submerged in water. After exposure to saltwater, rinse the watch with fresh water and wipe it dry. Do not expose the watch to extreme temperature changes.

5. Troubleshooting

• Display is blank or dim: The battery may be low or depleted. Consider battery replacement.
• Time is incorrect: Re-adjust the time and date settings as described in Section 2.1. Ensure the correct city code and DST setting are selected.
• Buttons are unresponsive: Ensure the watch is not in a locked mode (if applicable). If submerged, dry the watch thoroughly. If the issue persists, a service check may be required.
• Alarm does not sound: Check if the alarm is enabled in Alarm Mode (Section 2.2). Ensure the volume is not set to mute (if applicable).

If you encounter issues not covered here, please contact Casio customer support or an authorized service center.

6. Specifications

7. Warranty and Support

Your Casio G-Shock PRG-100 watch is covered by a manufacturer's warranty. For specific warranty terms and conditions, please refer to the warranty card included with your purchase or visit the official Casio website.

For further assistance, technical support, or service inquiries, please contact Casio customer service through their official website or an authorized service center in your region.

Visit Casio Official Website