Casio AQ-S820W Series Ana-Digital Tough Solar Watch User Manual

Introduction

This manual provides detailed instructions for the operation and maintenance of your Casio AQ-S820W Series Ana-Digital Tough Solar Watch. Please read this manual thoroughly to ensure proper use and to fully utilize all features of your watch. Keep this manual for future reference.

Key Features

• Tough Solar Power: Equipped with a solar panel that converts light into electrical power, eliminating the need for battery replacement. The watch charges from both sunlight and indoor light sources.
• 100-Meter Water Resistance: Designed to withstand water exposure during daily use, including rain, splashes, and recreational swimming. Not suitable for diving.
• Ana-Digital Display: Features both analog hands for time display and a digital LCD for additional information such as date, day, and various mode functions.
• Multi-Function Capabilities: Includes a 1/100-second stopwatch, countdown timer, multiple daily alarms, and world time for 31 time zones.
• LED Illumination: An amber LED backlight with afterglow provides clear visibility of the digital display in low-light conditions.
• Durable Construction: Resin case and band offer comfort, lightweight wear, and resistance to everyday impacts. The resin glass protects against scratches.

Product Overview

Familiarize yourself with the watch's components and button functions.

Image 1: Front view of the Casio AQ-S820W watch, showing the analog hands, digital display, and button labels (Adjust, Light, Mode, Search). The bezel indicates "Tough Solar" and "Illuminator".

• A (ADJUST): Used to enter and exit setting modes, and to reset values.
• B (LIGHT): Activates the LED backlight.
• C (MODE): Cycles through different operational modes (Timekeeping, Stopwatch, Timer, Alarm, World Time).
• D (SEARCH): Used to change settings or select options within setting modes.

Initial Setup

1. Initial Charging

Your watch is powered by a solar cell. Before initial use, expose the watch face to bright light for several hours to ensure it is sufficiently charged. Avoid covering the watch face during charging. A power indicator on the digital display shows the current charge level.

• High: Fully charged.
• Mid: Sufficient charge for normal operation.
• Low: Charge soon. Some functions may be disabled.

2. Setting Time and Date (Digital Display)

1. In Timekeeping Mode, press and hold button A (ADJUST) until the city code starts to flash on the digital display. This indicates the setting mode.
2. Press button C (MODE) to cycle through the settings: City Code → DST (Daylight Saving Time) → 12/24-hour format → Seconds → Hour → Minute → Year → Month → Day.
3. Use button D (SEARCH) to change the flashing value. For city code, select your home city. For time and date, adjust the numbers up or down.
4. Once all settings are correct, press button A (ADJUST) to exit the setting mode.

3. Adjusting Analog Hands

The analog hands should automatically synchronize with the digital time. If they do not, or if they are misaligned:

1. In Timekeeping Mode, press and hold button A (ADJUST) until the city code flashes.
2. Press button C (MODE) repeatedly until "H.SET" (Hand Set) appears on the digital display.
3. Press button D (SEARCH) to enter the hand adjustment mode. The minute hand will move to the 12 o'clock position.
4. Use button D (SEARCH) to advance the minute hand. Hold it down for high-speed movement. Align the hands to 12 o'clock.
5. Press button A (ADJUST) to confirm the hand position and exit the setting mode. The hands will then automatically move to the current digital time.

Operating Modes

Press button C (MODE) to cycle through the watch's various functions:

• Timekeeping Mode: Displays the current time, day, and date. This is the default mode.
• World Time Mode: Allows you to view the current time in 31 time zones (48 cities). Use button D (SEARCH) to scroll through city codes.
• Stopwatch Mode: Measures elapsed time with 1/100-second accuracy. Press D (SEARCH) to start/stop, and A (ADJUST) to reset.
• Countdown Timer Mode: Set a timer up to 24 hours. An alarm sounds when the countdown reaches zero. Press D (SEARCH) to start/stop, and A (ADJUST) to reset or set the timer.
• Alarm Mode: Set up to 5 independent daily alarms and an hourly time signal. Use D (SEARCH) to select an alarm and A (ADJUST) to turn it on/off or set the time.

Using the LED Light

Press button B (LIGHT) to illuminate the digital display. The light will stay on for a few seconds (afterglow). Note that frequent use of the light will consume more power and may require more frequent charging.

Care and Maintenance

Solar Charging Guidelines

• Regular Exposure: To maintain optimal charge, expose the watch to light regularly.
• Avoid Prolonged Darkness: Storing the watch in darkness for extended periods can deplete the charge and may require a full recharge.
• Charging Environment: Charge the watch in direct sunlight or under strong fluorescent light. Avoid extreme temperatures during charging.

Water Resistance Precautions

• The watch is rated for 100-meter water resistance. This means it is suitable for showering, swimming, and snorkeling.
• Do not operate buttons while the watch is wet or submerged.
• Avoid exposing the watch to hot water or steam, as this can damage the seals.
• After exposure to saltwater, rinse the watch with fresh water and wipe it dry.

Cleaning

Wipe the watch regularly with a soft, dry cloth. For stubborn dirt, use a soft cloth dampened with water and a mild neutral detergent, then wipe dry.

Troubleshooting

• Watch is not charging or power indicator is low: Ensure the watch face is exposed to bright light. Avoid covering the solar panel. If stored in darkness, it may take longer to fully charge.
• Analog hands do not match digital time: Perform the "Adjusting Analog Hands" procedure described in the Initial Setup section.
• Digital display is blank or dim: The watch may be in power-saving mode due to low charge or prolonged darkness. Expose it to light. If the issue persists after charging, contact customer support.
• Buttons are unresponsive: Ensure the watch is not wet. If the problem continues, a reset may be required (refer to advanced manual or contact support).

Specifications

Warranty and Support

Your Casio watch is covered by a manufacturer's warranty. Please refer to the warranty card included with your purchase for specific terms and conditions, including warranty period and coverage details.

For technical assistance, repairs, or further inquiries, please contact Casio customer support through their official website or the contact information provided in your warranty documentation.

For more information, visit the official Casio website: www.casio.com