Casio G-Shock GA-100WD-1AJF Watch Instruction Manual

Introduction

This manual provides detailed instructions for the operation and maintenance of your Casio G-Shock GA-100WD-1AJF watch. Designed for durability and functionality, this timepiece features shock resistance, 20 ATM water resistance, world time, stopwatch, timer, and alarm functions. Please read this manual thoroughly to ensure proper use and to maximize the lifespan of your watch.

Image 1: Front view of the Casio G-Shock GA-100WD-1AJF watch, showcasing its black case and brilliant white dial with analog and digital displays.

Setup

Initial Time Setting

1. Enter Time Setting Mode: Press and hold the ADJUST button (top left) until the city code starts to flash.
2. Select City Code: Use the FORWARD (bottom right) and REVERSE (top right) buttons to select your home city code.
3. Adjust Daylight Saving Time (DST): Press the MODE button (bottom left) to cycle through settings. When DST is flashing, use FORWARD or REVERSE to toggle ON/OFF.
4. Set Time and Date: Continue pressing MODE to move between hour, minute, year, month, and day settings. Use FORWARD and REVERSE to adjust values.
5. Exit Setting Mode: Press the ADJUST button to save settings and exit.

Analog Hand Alignment

If the analog hands do not match the digital time, perform the following adjustment:

1. Enter Hand Setting Mode: In the Timekeeping Mode, press and hold the FORWARD button for approximately 5 seconds until the digital display shows "H.SET" and the hour hand moves.
2. Adjust Hour Hand: Use the FORWARD and REVERSE buttons to align the hour hand to the 12 o'clock position.
3. Adjust Minute Hand: Press the MODE button. The minute hand will move. Use FORWARD and REVERSE to align the minute hand to the 12 o'clock position.
4. Exit Setting Mode: Press the ADJUST button to save and exit. The hands will automatically move to the current digital time.

Operating Modes

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

• Timekeeping Mode: Displays current time and date.
• World Time Mode: Displays the current time in 48 cities (29 time zones).
• Stopwatch Mode: Measures elapsed time, split times, and lap times.
• Timer Mode: Countdown timer.
• Alarm Mode: Set up to 5 daily alarms and an hourly time signal.

World Time Mode

In World Time Mode, use the FORWARD (bottom right) and REVERSE (top right) buttons to scroll through different city codes and view their current times. Pressing ADJUST (top left) will toggle Daylight Saving Time (DST) for the currently displayed city.

Stopwatch Mode

The stopwatch measures in 1/1000-second increments up to 100 hours. It also features speed measurement.

1. Start/Stop: Press the START/STOP button (bottom right).
2. Split/Reset: While the stopwatch is running, press the SPLIT/RESET button (top left) to record a split time. Press again to release the split. When stopped, press SPLIT/RESET to reset to zero.
3. Speed Measurement: After starting the stopwatch, press ADJUST (top left) to input a distance value (e.g., 1.0 km). The watch will calculate and display speed (MAX1998 unit/h).

Timer Mode

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

1. Set Timer: In Timer Mode, press and hold ADJUST (top left) until the current timer setting flashes. Use MODE to select hours or minutes, and FORWARD/REVERSE to adjust the value. Press ADJUST to save.
2. Start/Stop: Press START/STOP (bottom right) to start or stop the countdown.
3. Reset: While the timer is stopped, press SPLIT/RESET (top left) to reset to the initial set time.

Alarm Mode

The watch features 5 daily alarms and an hourly time signal.

1. Select Alarm: In Alarm Mode, use FORWARD (bottom right) to cycle through AL1 to AL5 and SIG (hourly time signal).
2. Set Alarm: For an alarm (AL1-AL5), press and hold ADJUST (top left) until the hour setting flashes. Use MODE to switch between hour and minute, and FORWARD/REVERSE to adjust. Press ADJUST to save.
3. Turn Alarm/SIG On/Off: While an alarm or SIG is displayed, press START/STOP (bottom right) to toggle it on or off. AL1 has a snooze function.

LED Light

Press the A.LIGHT button (top left, usually labeled "LIGHT") to illuminate the display. The watch features an Auto LED light function, which can be enabled or disabled. When enabled, tilting your wrist towards you will automatically activate the light. The afterglow duration can be set to 1.5 seconds or 3 seconds.

Maintenance

Water Resistance (20 ATM)

Your G-Shock GA-100WD-1AJF is water resistant to 200 meters (20 ATM). This means it is suitable for showering, swimming, and recreational scuba diving. Do not operate buttons while the watch is submerged in water. Avoid exposing the watch to extreme temperature changes while wet, as this can affect the seals.

Shock Resistance

The watch features a robust shock-resistant construction designed to withstand impacts and vibrations from daily use and sports activities. While highly durable, avoid unnecessary severe impacts.

Anti-Magnetic Watch (JIS1 Type)

This watch is designed to be less affected by magnetic fields, conforming to JIS1 type standards. However, strong magnetic fields can still cause temporary inaccuracies. Keep the watch away from strong magnets when possible.

Battery Replacement

The watch is powered by a Lithium Metal battery. When the display becomes dim or functions become erratic, it is time to replace the battery. Battery replacement should be performed by a qualified technician to ensure water resistance and proper function are maintained. Refer to the specifications for battery type.

Cleaning

Wipe the watch with a soft, dry cloth to remove dirt and moisture. 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.

Troubleshooting

• Incorrect Time Display:
  • Check if the home city code is correctly set.
  • Verify Daylight Saving Time (DST) setting.
  • Perform analog hand alignment if analog and digital times do not match.
• Buttons Not Responding:
  • Ensure the watch is not in a mode that locks button operations (e.g., during certain setting procedures).
  • If submerged in water, do not press buttons.
  • Low battery may affect button responsiveness.
• Display is Dim or Blank:
  • The battery may be low and require replacement.
  • Ensure the watch is not exposed to extreme cold, which can temporarily affect LCD visibility.
• Inaccurate Stopwatch/Timer:
  • Reset the stopwatch/timer to ensure it starts from zero.
  • Ensure no other functions are interfering with the timing operation.

Specifications

Warranty and Support

For warranty information, please refer to the warranty card included with your purchase or visit the official Casio G-Shock website. Casio provides specific warranty terms and conditions that vary by region.

If you require technical assistance or have questions not covered in this manual, please contact Casio customer support through their official website or the contact information provided in your product packaging. When contacting support, please have your model number (GA-100WD-1AJF) and purchase details ready.

Online Resources: For the most up-to-date information, FAQs, and additional support, please visit the official G-Shock website: www.gshock.com