Casio F91WG-9 Digital Watch Instruction Manual

Introduction

This manual provides detailed instructions for the proper use and care of your Casio F91WG-9 digital watch. Please read this manual thoroughly to ensure optimal performance and longevity of your timepiece. The Casio F91WG-9 is a classic digital watch featuring a micro-light, daily alarm, 1/100 second digital stopwatch, hourly time signal, and auto-calendar.

Getting Started: Button Functions and Time Setting

Your Casio F91WG-9 watch typically features three buttons:

• Light Button (Top-Left): Activates the micro-light for display illumination.
• Mode Button (Bottom-Left): Cycles through different modes (Timekeeping, Alarm, Stopwatch).
• Adjust/Start/Stop Button (Bottom-Right): Used for setting values, starting/stopping the stopwatch, and toggling features.

Setting the Time and Date

1. In the Timekeeping Mode, press the Mode button three times to enter the Time Setting Mode. The seconds digits will begin to flash.
2. Press the Adjust/Start/Stop button to reset the seconds to 00.
3. Press the Mode button to move the flashing selection to the hour digits.
4. Use the Adjust/Start/Stop button to increase the hour. Hold the button to rapidly advance the digits.
5. Press the Mode button to move the flashing selection to the minute digits.
6. Use the Adjust/Start/Stop button to increase the minutes.
7. Continue pressing the Mode button to cycle through the year, month, and day settings, adjusting each with the Adjust/Start/Stop button.
8. Once all settings are correct, press the Light button to exit the Time Setting Mode and return to Timekeeping Mode.

12/24-Hour Format Selection

While in the Timekeeping Mode, press the Adjust/Start/Stop button to toggle between 12-hour and 24-hour (military) time formats.

Operating Modes

Using the Alarm

1. From Timekeeping Mode, press the Mode button once to enter Alarm Mode. The alarm time will be displayed.
2. Press the Adjust/Start/Stop button to set the alarm hour.
3. Press the Mode button to move to the minute setting.
4. Press the Adjust/Start/Stop button to set the alarm minutes.
5. To turn the alarm ON or OFF, press the Light button while in Alarm Mode. An alarm indicator will appear on the display when the alarm is active.
6. To return to Timekeeping Mode, press the Mode button.

Using the Stopwatch

1. From Timekeeping Mode, press the Mode button twice to enter Stopwatch Mode. The display will show "00:00:00".
2. Press the Adjust/Start/Stop button to start the stopwatch.
3. Press the Adjust/Start/Stop button again to stop the stopwatch.
4. To reset the stopwatch to "00:00:00", press the Light button while the stopwatch is stopped.
5. To return to Timekeeping Mode, press the Mode button.

Hourly Time Signal (Chime)

While in Alarm Mode, press the Adjust/Start/Stop button to toggle the Hourly Time Signal ON or OFF. An indicator will appear on the display when the hourly chime is active.

Using the Micro-Light

Press the Light button at any time to illuminate the display for a few seconds, allowing you to read the time in low-light conditions.

Maintenance and Care

Battery Information

Your Casio F91WG-9 watch is powered by a CR2016 battery, which has an approximate life of 7 years. When the display becomes dim or functions become erratic, it may be time to replace the battery. It is recommended to have the battery replaced by a qualified watch technician to ensure proper sealing and water resistance.

Water Resistance

This watch is rated for 30 meters (3 ATM) water resistance. This means it is suitable for everyday use and can withstand splashes or brief immersion in water. It is not suitable for swimming, diving, or showering, as prolonged water exposure or high-pressure water jets can compromise the water resistance.

General Care

• Clean the watch regularly with a soft, dry cloth. For stubborn dirt, use a slightly damp cloth and then dry thoroughly.
• Avoid exposing the watch to extreme temperatures, direct sunlight for extended periods, or strong magnetic fields.
• Protect the watch from strong impacts or shocks.
• Avoid contact with solvents, detergents, perfumes, or other chemicals, as they can damage the resin materials.

Troubleshooting

• Display is blank or dim: The battery may be low or depleted. Replace the battery.
• Time is incorrect: Re-set the time and date following the instructions in the "Setting the Time and Date" section.
• Alarm or Hourly Time Signal not sounding: Ensure the alarm/chime is activated in the Alarm Mode. Check for the corresponding indicator on the display.
• Light not working: This could indicate a low battery. If other functions work, the light may be the first to be affected by low power.
• Buttons are unresponsive: Ensure the watch is not exposed to extreme cold or heat. If the issue persists, a professional inspection may be required.

Specifications

Warranty and Support

Your Casio F91WG-9 watch comes with a standard limited warranty. For specific warranty terms, service, or additional support, please refer to the warranty card included with your purchase or visit the official Casio website. Keep your proof of purchase for warranty claims.

For further assistance, you may contact Casio customer support through their official channels.