Casio G-Shock GD400-1CR Men's Grey Sport Watch Instruction Manual

Introduction

Thank you for choosing the Casio G-Shock GD400-1CR Men's Grey Sport Watch. This manual provides essential information regarding the watch's features, setup, operation, and maintenance to ensure optimal performance and longevity. The G-Shock GD400-1CR is engineered for durability and reliability, featuring shock resistance and 200-meter water resistance, making it suitable for various demanding activities.

Key Features

• Shock Resistant: Designed to withstand impacts and vibrations.
• 200M Water Resistant: Suitable for professional marine activity and serious surface water sports, but not for diving.
• LED Backlight: Provides illumination for easy reading in low light conditions.
• Auto Light Switch: Automatically illuminates the display when the watch is tilted towards your face.
• World Time: Displays the current time in 48 cities (31 time zones) around the world.
• 5 Daily Alarms: Set up to five independent daily alarms.
• Hourly Time Signal: An audible alert every hour on the hour.
• Countdown Timer: A timer that counts down from a specified time.
• Stopwatch: Measures elapsed time, split time, and two finishes.
• Full Auto Calendar: Pre-programmed until the year 2099.
• Low Battery Warning: Indicates when the battery needs replacement.
• Selectable Flash Alert: Flashes the display for alarms, hourly time signals, and countdown timer end.

Setup

1. Initial Power-On and Time Setting

Upon first use or after a battery replacement, you may need to set the current time and date. Refer to the "Timekeeping Mode" section for detailed instructions on adjusting these settings.

2. Setting Your Home City (Time Zone)

1. In the Timekeeping Mode, press and hold the ADJUST button until the city code starts to flash.
2. Use the FORWARD and REVERSE buttons to select your desired city code.
3. Press the MODE button to cycle through other settings like Daylight Saving Time (DST) and 12/24-hour format.
4. Use FORWARD or REVERSE to change these settings.
5. Press ADJUST to exit the setting screen.

Image: The Casio G-Shock GD400-1CR watch displayed on a wrist, showing its digital display and robust design.

Operating Instructions

1. Navigating Modes

Press the MODE button (bottom left) to cycle through the different watch modes:

• Timekeeping Mode
• World Time Mode
• Alarm Mode
• Stopwatch Mode
• Countdown Timer Mode

2. Timekeeping Mode

This mode displays the current time, day of the week, and date. To adjust the time and date:

1. In Timekeeping Mode, press and hold ADJUST until the city code flashes.
2. Use FORWARD and REVERSE to select your Home City.
3. Press MODE to move to the DST setting. Use FORWARD to toggle DST on/off.
4. Press MODE again to move to the 12/24-hour format setting. Use FORWARD to toggle.
5. Continue pressing MODE to cycle through seconds, hour, minute, year, month, and day settings. Use FORWARD and REVERSE to adjust values.
6. Press ADJUST to save settings and exit.

3. World Time Mode

This mode allows you to view the current time in 48 cities (31 time zones). To view different city times:

• In World Time Mode, use the FORWARD and REVERSE buttons to scroll through city codes.

4. Alarm Mode

The watch has 5 daily alarms and an hourly time signal. To set an alarm:

1. In Alarm Mode, use FORWARD or REVERSE to select the alarm number (AL1 to AL5) or the Hourly Time Signal (SIG).
2. Press and hold ADJUST until the alarm time starts to flash.
3. Use MODE to move between hour and minute settings. Use FORWARD and REVERSE to adjust the time.
4. Press ADJUST to save the alarm time.
5. To turn an alarm or the Hourly Time Signal on/off, select it and press FORWARD.

5. Stopwatch Mode

The stopwatch measures elapsed time up to 23 hours, 59 minutes, 59.99 seconds.

• In Stopwatch Mode, press START (top right) to start and stop the stopwatch.
• Press REVERSE (bottom right) to reset the stopwatch to zero.

6. Countdown Timer Mode

The countdown timer can be set from 1 minute to 24 hours.

1. In Countdown Timer Mode, press and hold ADJUST until the current countdown start time flashes.
2. Use MODE to move between hour and minute settings. Use FORWARD and REVERSE to adjust the time.
3. Press ADJUST to save the setting.
4. Press START to start and stop the countdown.
5. Press REVERSE to reset the timer to its start time.

7. LED Backlight and Auto Light Switch

• Press the LIGHT button (top right) to illuminate the display.
• To enable/disable the Auto Light Switch, hold the LIGHT button in Timekeeping Mode for about three seconds. An indicator will appear/disappear on the display. When enabled, tilting your wrist towards your face will automatically activate the backlight.

Maintenance

1. Water Resistance

The GD400-1CR is water resistant to 200 meters (660 feet). This rating means it is suitable for showering, swimming, and snorkeling. However, it is not suitable for scuba diving. Avoid operating buttons while the watch is wet or submerged to prevent water ingress.

2. Cleaning

Wipe the watch with a soft, dry cloth. For stubborn dirt, use a soft cloth dampened with water and a mild neutral detergent, then wipe dry. Avoid using volatile agents like thinner or benzine, as they may damage the resin components.

3. Battery Replacement

The watch uses one CR2032 battery, with an approximate life of 3 years. When the low battery warning appears, it is recommended to have the battery replaced by an authorized Casio service center to ensure proper water resistance and functionality.

Image: The G-Shock watch presented in its durable metal tin, highlighting its robust packaging.

Troubleshooting

• Display is blank or dim: The battery may be low or depleted. Replace the battery (CR2032).
• Time is incorrect: Ensure your Home City setting is correct and DST is properly configured. Re-adjust time and date as per "Timekeeping Mode" instructions.
• Auto Light Switch not working: Check if the Auto Light Switch feature is enabled (hold LIGHT button for 3 seconds). Ensure the watch is tilted sufficiently (approx. 40 degrees) in a dark environment.
• Buttons are unresponsive: Ensure the watch is not in a setting mode where buttons are locked. If submerged, ensure it is dry before operating buttons.

Specifications

Image: A detailed view of the G-Shock GD400-1CR watch face, showing the digital display and button labels.

Warranty and Support

Your Casio G-Shock GD400-1CR watch is covered by a manufacturer's warranty. For specific warranty details, including coverage period and terms, please refer to the warranty card included with your purchase or visit the official Casio website. For technical support, repairs, or inquiries, please contact Casio customer service or an authorized service center.

Proposition 65 Warning: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.