Casio W-735H-8A2VDF Digital Wristwatch User Manual

1. Introduction

This manual provides detailed instructions for the operation and maintenance of your Casio W-735H-8A2VDF Digital Wristwatch. This timepiece is designed for durability and functionality, featuring a 10-year battery, 100-meter water resistance, and a vibration alarm. Please read this manual thoroughly to ensure proper use and to maximize the lifespan of your watch.

Image 1.1: Front view of the Casio W-735H-8A2VDF Digital Wristwatch. The watch features a grey resin case and strap, a black digital display with time, date, and mode indicators, and buttons labeled 'ADJUST', 'MODE', 'LIGHT', 'SPLIT', and 'START'. The bezel is marked 'VIBRATION ALARM' and 'SUPER ILLUMINATOR'.

2. Setup

2.1 Setting Time and Date

1. In Timekeeping Mode, hold down the ADJUST button (top left) until the seconds begin to flash, indicating the setting screen.
2. Press the MODE button (bottom left) to cycle through the settings: Seconds → DST (Daylight Saving Time) → Hour → Minute → Year → Month → Day.
3. Use the START button (top right) to increase the flashing value or the SPLIT button (bottom right) to decrease it. For seconds, pressing START resets them to 00.
4. Once all settings are correct, press the ADJUST button to exit the setting screen.

2.2 Setting the Alarm

1. From Timekeeping Mode, press the MODE button until you reach the Alarm Mode (indicated by 'ALM' on the display).
2. Hold down the ADJUST button until the alarm hour digits begin to flash.
3. Use the START and SPLIT buttons to set the desired alarm hour and minute.
4. Press the MODE button to toggle between setting the hour and minute.
5. Press the ADJUST button to exit the alarm setting screen.

2.3 Activating Vibration Alarm and Hourly Time Signal

• In Alarm Mode, press the START button to toggle the alarm ON/OFF. An alarm indicator will appear when active.
• Press the SPLIT button to toggle the Hourly Time Signal ON/OFF. A signal indicator will appear when active.
• To activate the vibration for the alarm, press and hold the START button in Alarm Mode until 'VIB' appears on the display. Repeat to deactivate.

3. Operating Instructions

3.1 Mode Navigation

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

• Timekeeping Mode (current time, date)
• Stopwatch Mode ('ST')
• Countdown Timer Mode ('TR')
• Alarm Mode ('ALM')

Image 3.1: Side view of the Casio W-735H-8A2VDF Digital Wristwatch. This image highlights the four operational buttons on the watch's sides, labeled 'ADJUST', 'MODE', 'SPLIT', and 'START', which are used for navigating modes and setting functions.

3.2 Stopwatch Function

1. Enter Stopwatch Mode ('ST').
2. Press START (top right) to begin timing.
3. Press START again to stop timing.
4. Press ADJUST (top left) to reset the stopwatch to zero.
5. To record split times, press SPLIT (bottom right) while the stopwatch is running. The display will show the split time. Press SPLIT again to return to elapsed time.

3.3 Countdown Timer Function

1. Enter Countdown Timer Mode ('TR').
2. Hold down the ADJUST button until the timer settings begin to flash.
3. Use the START and SPLIT buttons to set the desired countdown time (hours, minutes, seconds).
4. Press ADJUST to exit the setting screen.
5. Press START to begin the countdown. Press START again to pause/resume.
6. When the countdown reaches zero, the watch will emit an alarm or vibrate (if set). Press any button to stop the alert.

3.4 Using the Illuminator (LED Backlight)

Press the LIGHT button (bottom center) to illuminate the display for easy viewing in low-light conditions. The backlight duration is preset.

4. Maintenance

4.1 Cleaning Your Watch

Regularly wipe your 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.

4.2 Water Resistance Precautions

Your Casio W-735H-8A2VDF is rated for 100-meter water resistance. This means it is suitable for swimming and snorkeling. However, avoid operating the watch buttons while it is submerged in water. Do not use the watch for scuba diving or other types of diving that require air tanks.

4.3 Battery Replacement

The watch is equipped with an LR44 battery designed for approximately 10 years of operation. When the display becomes dim or functions become erratic, it indicates that the battery power is low. Battery replacement should be performed by a qualified technician to ensure proper water resistance and function. Do not attempt to replace the battery yourself.

Image 4.1: Back view of the Casio W-735H-8A2VDF Digital Wristwatch. The stainless steel case back is visible, engraved with 'CASIO', 'WATER RESIST 10BAR', 'STAINLESS STEEL BACK', and 'SHOCK RESIST', along with the model number.

5. Troubleshooting

• Time/Date is Incorrect: Re-enter the Timekeeping Mode and adjust the time and date settings as described in Section 2.1. Ensure DST (Daylight Saving Time) is set correctly for your region.
• Alarm Not Sounding/Vibrating: Check if the alarm is activated in Alarm Mode (Section 2.3). Verify that the vibration alarm is enabled if you prefer vibration over sound.
• Display is Blank or Faint: This usually indicates a low battery. Contact a qualified watch technician for battery replacement.
• Buttons Are Unresponsive: If the watch is unresponsive, try pressing all four buttons simultaneously for a few seconds to perform a soft reset. If the issue persists, the battery may be completely depleted or there may be an internal malfunction requiring professional service.

6. Specifications

Image 6.1: The Casio W-735H-8A2VDF Digital Wristwatch displayed on a wrist, illustrating its size and fit for daily wear.

7. Warranty and Support

For detailed information regarding the product warranty, please refer to the warranty card included with your purchase or visit the official Casio website. For customer support, service, or inquiries about replacement parts, please contact Casio customer service directly through their official channels.

Casio Official Website: www.casio.com