Introduction
Thank you for choosing the Timex Sport 52mm Digital Watch, Model TW5M634009J. This manual provides essential information for the proper setup, operation, and maintenance of your new timepiece. Please read these instructions carefully to ensure optimal performance and longevity of your watch.

Front view of the Timex Sport 52mm Digital Watch, showcasing its digital display and black resin strap.
Setup
1. Initial Activation
Your Timex Sport watch is powered by a pre-installed lithium-metal battery. The watch should be operational upon removal from its packaging. If the display is blank, ensure no protective plastic tabs are present under the crown or buttons, which might prevent battery contact during shipping.
2. Setting Time and Date
The Timex Sport digital watch typically features multiple buttons for setting functions. While specific button labels may vary, the general procedure involves:
- Press and hold the MODE button (usually on the bottom left) until the time display begins to flash, indicating setup mode.
- Use the SET or ADJUST button (often top left or right) to cycle through hours, minutes, year, month, and day settings.
- Use the START/STOP or LIGHT button (often top right or bottom right) to increase the flashing value.
- Once all settings are correct, press the MODE button again to exit setup mode and save your changes.
3. Adjusting the Strap
The black resin strap is designed to fit wrists from 150mm to 205mm. To adjust, simply use the buckle closure to select the appropriate hole for a comfortable and secure fit. Ensure the watch is snug but not overly tight to allow for proper circulation.

Side view of the watch, illustrating the button placement for various functions.
Operating Instructions
1. Time Display
The watch primarily displays the time and date in a digital format. The default display shows hours, minutes, and seconds, along with the current date.
2. Using the Night Light
Your watch includes a night light feature for visibility in low-light conditions. Press the LIGHT button (refer to your watch's specific button layout) to illuminate the display. The light will typically stay on for a few seconds before automatically turning off.
3. Water Resistance
This watch is water resistant up to 200 meters (660 feet), making it suitable for swimming and recreational diving. Important: Do not press any buttons while the watch is submerged in water, as this can compromise the water resistance seal and cause damage.
Maintenance
1. Cleaning Your Watch
To clean your watch, wipe it with a soft, damp cloth. For stubborn dirt, a mild soap solution can be used, followed by rinsing with clean water and drying thoroughly. Avoid using harsh chemicals or abrasive materials, which can damage the resin case, strap, or acrylic lens.
2. Battery Replacement
The watch uses one lithium-metal battery (CR2025 cell). When the display dims or functions become erratic, it may be time to replace the battery. Battery replacement should ideally be performed by a qualified watch technician to ensure the water resistance seal is properly maintained. Attempting to replace the battery yourself may void the warranty or compromise the watch's water resistance.

Rear view of the watch case, showing the battery type (CR2025 cell) and water resistance rating.
3. Water Resistance Precautions
- Avoid exposing the watch to extreme temperature changes (e.g., hot showers followed by cold water).
- Do not operate buttons while the watch is wet or submerged.
- After exposure to saltwater, rinse the watch with fresh water and dry it thoroughly.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or dim. | Low battery or battery depletion. | Replace battery (CR2025). Consult a professional for replacement. |
| Time is incorrect. | Time settings need adjustment. | Refer to the "Setting Time and Date" section to reset the time. |
| Water inside the watch. | Buttons pressed underwater or seal compromised. | Immediately take the watch to a qualified service center. Do not attempt to dry it yourself. |
Specifications
- Model Number: TW5M634009J
- Case Diameter: 52 mm
- Case Thickness: 11 mm
- Case Material: Resin
- Strap Material: Resin
- Strap Width: 20 mm
- Band Length: 205 mm (fits wrists 150-205 mm)
- Crystal Type: Acrylic
- Movement Type: Quartz
- Display Format: Digital
- Water Resistance: 200 Meters (suitable for swimming/recreational diving)
- Power Source: 1 Lithium-metal battery (CR2025)
- Special Features: Night light, Date and Time display
- Closure Type: Buckle
- Weight: 120 g
Warranty Information
Your Timex Sport 52mm Digital Watch comes with a limited warranty. Please refer to the warranty card included with your purchase for specific terms, conditions, and duration of coverage. The warranty typically covers manufacturing defects but does not cover damage resulting from improper use, accidents, or unauthorized repairs.
Support
For further assistance, technical support, or service inquiries regarding your Timex Sport watch, please visit the official Timex website or contact their customer service department. Contact information can typically be found on the Timex website or in the packaging materials.