Introduction
This manual provides instructions for the operation and maintenance of your Timex Ironman Shock Endure 42mm Digital Watch. Please read this manual thoroughly to ensure proper use and to understand all features of your watch.
The Timex Ironman Shock Endure is designed for durability and performance, featuring a shock-resistant case, 200m water resistance, a 30-lap memory chronograph, and an INDIGLO backlight.
Setup
Button Functions
Your watch features several buttons for navigation and function control. Refer to the image below for button identification.

Image 1: Watch Face and Button Layout. This image displays the front of the Timex Ironman Shock Endure watch, highlighting the digital display and the six control buttons. The top left button is 'SET/RECALL', the bottom left is 'MODE', the top right is 'INDIGLO', the bottom right is 'STOP/RESET', and the two central bottom buttons are 'START' and 'SPLIT'.
- MODE Button (Bottom Left): Cycles through different watch modes (Time, Chronograph, Timer, Alarm).
- SET/RECALL Button (Top Left): Used to set time/date, and recall chronograph laps.
- INDIGLO Button (Top Right): Activates the INDIGLO backlight.
- STOP/RESET Button (Bottom Right): Stops and resets the chronograph or timer.
- START Button (Center Bottom Left): Starts the chronograph or timer.
- SPLIT Button (Center Bottom Right): Records split times in chronograph mode.
Setting Time and Date
- From Time Mode, press and hold the SET/RECALL button until the display flashes.
- Press the MODE button to cycle through the settings: Seconds, Hour, Minute, Year, Month, Day.
- Use the START or SPLIT buttons to adjust the flashing value.
- Once all settings are correct, press the SET/RECALL button to exit setting mode.
Operating Modes
Time Mode
This is the default display mode, showing the current time, day of the week, and date. Press the INDIGLO button to activate the backlight for visibility in low light conditions.
Chronograph Mode (Stopwatch)
The watch features a 30-lap memory chronograph for measuring elapsed time.
- From Time Mode, press the MODE button until "CHRONO" or a stopwatch icon appears.
- Press the START button to begin timing.
- Press the SPLIT button to record a lap time. The display will show the split time while the chronograph continues to run in the background. Press SPLIT again to return to the running time.
- Press the STOP/RESET button to pause the chronograph. Press START to resume.
- To reset the chronograph, press the STOP/RESET button while it is paused.
- To recall lap times, press the SET/RECALL button while in Chronograph mode. Use START or SPLIT to scroll through recorded laps.
Timer Mode
The timer function allows for countdown timing.
- From Time Mode, press the MODE button until "TIMER" or a timer icon appears.
- To set the timer, press and hold the SET/RECALL button until the display flashes.
- Use the MODE button to select hours, minutes, or seconds, and START or SPLIT to adjust the values.
- Press SET/RECALL to confirm and exit setting mode.
- Press the START button to begin the countdown.
- Press the STOP/RESET button to pause the timer. Press START to resume.
- When the timer reaches zero, an alarm will sound. Press any button to stop the alarm.
Alarm Mode
Set an alarm to sound at a specific time.
- From Time Mode, press the MODE button until "ALARM" or an alarm icon appears.
- To set the alarm time, press and hold the SET/RECALL button until the display flashes.
- Use the MODE button to select hours or minutes, and START or SPLIT to adjust the values.
- Press SET/RECALL to confirm and exit setting mode.
- To turn the alarm ON/OFF, press the START button while in Alarm mode. An alarm icon will appear when the alarm is active.
- When the alarm sounds, press any button to silence it.
INDIGLO Backlight
The INDIGLO backlight illuminates the watch display for easy reading in low-light conditions. Press the INDIGLO button (top right) to activate it. The backlight will remain on for a few seconds.
Water Resistance
This watch is water resistant to 200 meters (660 feet). It is suitable for recreational scuba diving. Do not press any buttons while the watch is submerged to prevent water entry.

Image 2: Watch Caseback. This image shows the stainless steel caseback of the watch, clearly indicating its 200-meter water resistance rating.
Maintenance
Cleaning Your Watch
To clean your watch, wipe it with a soft, damp cloth. For water-resistant models, you can rinse it under tap water. Avoid using harsh chemicals or abrasive cleaners, as these can damage the watch's finish or seals.
Battery Replacement
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 proper sealing and water resistance. Refer to the caseback for battery type (e.g., CR 2016).

Image 3: Angled View of Watch Back. This image provides an angled view of the watch's rear, showing the caseback details and the attachment of the durable resin strap.
Storage
Store your watch in a cool, dry place away from direct sunlight and extreme temperatures when not in use. Avoid exposing it to strong magnetic fields.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is dim or blank. | Low battery. | Replace the battery. |
| Watch not keeping accurate time. | Incorrect time setting; battery low. | Reset time and date; replace battery if issue persists. |
| Buttons are unresponsive. | Watch may be in a locked mode (if applicable); internal malfunction. | Try pressing all buttons to see if any respond. If unresponsive, contact customer support. |
| Water inside the watch. | Buttons pressed underwater; damaged seal. | Immediately take the watch to a qualified service center. Do not attempt to dry it yourself. |
Specifications
- Model Number: TW5M648009J
- Case Size: 42mm
- Case Material: Resin
- Strap Material: Resin
- Display Type: Digital
- Water Resistance: 200 meters (660 feet)
- Chronograph: 30-lap memory
- Backlight: INDIGLO
- Shock Resistance: Yes
- Battery Type: CR 2016

Image 4: Watch on Surface. This image shows the Timex Ironman Shock Endure watch from an elevated perspective, resting on a dark, textured surface, emphasizing its sturdy construction.
Warranty and Support
Your Timex watch is warranted against manufacturing defects for a period of one year from the original date of purchase. This warranty does not cover normal wear and tear, battery, crystal, watch case, strap, or bracelet. Damage resulting from improper handling, lack of care, accidents, or unauthorized repairs is not covered.
For warranty service or technical support, please visit the official Timex website or contact their customer service department. Keep your proof of purchase for warranty claims.

Image 5: Watch on Wrist. This image illustrates the Timex Ironman Shock Endure watch being worn on a person's wrist, providing a perspective on its size and how it appears when worn.





