Citizen Skyhawk Eco-Drive Manual: A Comprehensive Guide
This manual provides detailed instructions for Citizen Skyhawk Eco-Drive watches, covering time setting, chronograph use, alarm functions, and troubleshooting procedures.
It includes information on Eco-Drive technology, charging, power reserve, and essential handling precautions for optimal performance and longevity.
The Citizen Skyhawk Eco-Drive represents a pinnacle of Japanese watchmaking, blending advanced technology with robust design. These timepieces are renowned for their Eco-Drive technology – a revolutionary system powered by any light source, eliminating the need for traditional battery replacements.
The Skyhawk series, particularly models like the JY0040-59L and JY8128-56L (Blue Angels editions), are celebrated for their radio-controlled time synchronization, ensuring exceptional accuracy worldwide. This manual serves as a comprehensive guide to understanding and maximizing the features of your Skyhawk watch, from basic time and calendar adjustments to utilizing the chronograph and alarm functions.
Whether you’re a seasoned watch enthusiast or a new Skyhawk owner, this resource will empower you to fully appreciate the sophistication and reliability of your Citizen timepiece.
Understanding the Eco-Drive Technology
Citizen’s Eco-Drive technology is a groundbreaking innovation in watchmaking, harnessing the power of light – both natural and artificial – to generate energy. Unlike traditional quartz watches relying on batteries, Eco-Drive converts light into electricity, storing the excess power in a rechargeable capacitor.
This sustainable system offers several advantages, including eliminating battery changes and reducing environmental impact. The Skyhawk Eco-Drive benefits from this, providing consistent and reliable timekeeping.
Understanding the charging process and power reserve is crucial for optimal performance. Regular light exposure ensures continuous operation, while the power reserve indicates how long the watch will run without light. This technology is a core feature of the Citizen experience.
Key Features of the Skyhawk Series
The Citizen Skyhawk series is renowned for its advanced functionality and robust design, appealing to aviation enthusiasts and watch connoisseurs alike. Key features include radio-controlled time synchronization, ensuring atomic clock precision across multiple time zones.
A prominent chronograph function allows for accurate time measurement, with lap time recording capabilities. The series also boasts a versatile world time function, displaying times in various cities simultaneously.
Furthermore, the Skyhawk incorporates a reliable alarm function and benefits from the Eco-Drive’s light-powered technology; Its durable construction and stylish aesthetics make it a standout timepiece, offering both practicality and sophistication.

Time and Calendar Setting
This section details procedures for accurately setting the time and calendar on your Citizen Skyhawk Eco-Drive, both manually and via radio synchronization.
Learn to adjust the date and time effectively for reliable performance and to utilize the watch’s full capabilities.
Setting the Time Manually
To set the time manually on your Citizen Skyhawk Eco-Drive, begin by gently pulling the crown out to the first click. This action allows adjustment of the time. Rotate the crown to move the hands to the desired hour and minute markings, ensuring accuracy. Pay close attention to the AM/PM indicator if your model features one.
Once the correct time is set, carefully push the crown back to its original position. It’s crucial to ensure the crown is fully seated to maintain water resistance. Manual setting is ideal when radio signal reception is unavailable or for initial setup. Remember to synchronize with radio signals when possible for continued accuracy.
Refer to your specific model’s diagram for precise crown operation details.
Using the Radio-Controlled Time Synchronization
Your Citizen Skyhawk Eco-Drive features radio-controlled time synchronization, automatically receiving time signals from atomic clocks. To initiate synchronization, ensure you’re in an area with a strong signal – typically at night. Pull the crown out to the second click, then slowly push it back in.
The watch will then begin searching for a signal. Successful synchronization is indicated by the hands rapidly moving to the correct time. This process may take several minutes. If unsuccessful, try moving to a different location or repeating the process.
Regular synchronization ensures exceptional accuracy, minimizing time drift. Note that signal reception can be affected by location and atmospheric conditions.
Calendar Adjustment Procedures
Adjusting the calendar on your Citizen Skyhawk Eco-Drive requires careful attention. First, pull the crown out to the second click. Then, rotate the crown to select the desired calendar function – date or month. Use the crown to set the correct day and month, ensuring the date is accurate.
Avoid adjusting the calendar between 9 PM and 1 AM, as this could damage the movement during automatic time synchronization. If adjustments are necessary during these hours, manually disable the radio signal reception first.
Always double-check the date and month after adjustment to ensure accuracy and prevent future complications.
World Time Function Overview
The Citizen Skyhawk Eco-Drive’s World Time function allows you to display the time in various cities around the globe. To access this feature, typically, you’ll need to pull the crown out to a specific position – often the first or second click – depending on the model.
Rotate the crown to select a city representing a desired time zone. The watch will then display the corresponding local time for that city.
Ensure the 24-hour indicator is correctly aligned for accurate time representation. This function is particularly useful for travelers or individuals needing to track times in multiple locations simultaneously.

Using the Chronograph Function
The Skyhawk’s chronograph accurately measures elapsed time. Utilize the pushers to start, stop, and reset measurements, recording both total and lap times with precision.
Starting, Stopping, and Resetting the Chronograph
To initiate the chronograph, press the top right pusher; the seconds hand will begin sweeping to indicate elapsed time. Pressing the same pusher again will halt the timing, freezing the seconds hand to display the measured duration. The minute and hour sub-dials will simultaneously track longer intervals.
For lap time recording, utilize the bottom right pusher while the chronograph is running. This momentarily stops the seconds hand, allowing you to note the lap time before resuming the measurement with another press. To completely reset the chronograph and return to zero, fully depress the top right pusher when the timing is paused. Ensure the chronograph is fully reset before initiating a new measurement for accurate results.
Lap Time Recording
The Citizen Skyhawk chronograph excels in lap time measurement. While the chronograph is actively timing, pressing the lower-right pusher momentarily pauses the seconds hand, allowing precise lap time observation. This function doesn’t reset the overall timer; it merely freezes the seconds hand for a quick reading.
Repeatedly pressing the lower-right pusher during a timed event records multiple lap times without interrupting the total elapsed time. The seconds hand will resume sweeping with each subsequent press. This feature is invaluable for tracking splits in races or other timed activities, providing detailed performance data. Remember to reset the chronograph fully after the event;
Chronograph Accuracy and Maintenance
The Citizen Skyhawk’s chronograph function offers impressive accuracy, inherent to the Eco-Drive’s quartz movement. However, consistent accuracy relies on proper care. Avoid subjecting the watch to strong shocks or magnetic fields, as these can temporarily affect timing precision.
Regular cleaning is crucial; gently wipe the case and crystal with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners. While the Eco-Drive requires no battery changes, ensure sufficient light exposure for optimal chronograph performance. Periodic resetting of the chronograph to zero can help maintain its long-term reliability.

Understanding the Alarm Function
The Skyhawk’s alarm feature allows setting a second time alert. Learn to activate, deactivate, and reset the alarm, utilizing repeat options for convenient daily use.
Setting the Alarm Time
To set the alarm on your Citizen Skyhawk Eco-Drive, begin by pulling the crown out to the second position – this is typically indicated in your watch’s specific manual. Once in this mode, the alarm hand will become active. Rotate the crown to adjust the hour and minute settings for the desired alarm time.
Pay close attention to the AM/PM indicator, ensuring the correct time of day is selected. Some models may require pressing a button to cycle through the settings. After setting the desired time, push the crown back into its normal position to save the alarm setting. Verify the alarm hand points to the correct time to confirm successful programming.
Remember to consult your model’s manual for precise instructions, as slight variations may exist between different Skyhawk versions.
Activating and Deactivating the Alarm

Activating the alarm on your Citizen Skyhawk Eco-Drive usually involves pressing a dedicated alarm button, often located on the side of the watch case. A confirmation signal, such as a beep or a hand movement, will indicate successful activation. To deactivate the alarm, simply press the same button again.
Some models feature a sliding switch for alarm control, offering a visual indication of the alarm’s status. Ensure the alarm is deactivated when not in use to conserve power. The alarm will sound at the pre-set time, and can typically be stopped by pressing any button on the watch.
Refer to your specific model’s manual for detailed instructions, as button functions can vary.
Alarm Reset and Repeat Options
Citizen Skyhawk Eco-Drive alarms often offer a ‘snooze’ or ‘reset’ function. After the initial alarm sound, pressing a designated button typically silences the alarm for a few minutes, allowing for a brief respite before it sounds again. Alternatively, a full reset deactivates the alarm entirely.
Many models include repeat options, enabling the alarm to sound daily, on weekdays, or on specific days of the week. These settings are usually adjusted through a combination of button presses and crown manipulations.
Consult your watch’s manual to understand the specific reset and repeat functionalities available on your particular Skyhawk model, ensuring optimal alarm usage.

Eco-Drive Specific Considerations
Citizen’s Eco-Drive technology relies on light for power. Understanding charging habits, checking the power reserve, and recognizing low-charge indicators are crucial for reliable operation;
Charging and Light Exposure
The Citizen Eco-Drive Skyhawk utilizes any light source – natural sunlight, fluorescent, or even indoor lighting – to generate power. Direct sunlight provides the fastest charging, but consistent exposure to ambient light will maintain the watch’s operation.
Avoid prolonged exposure to extremely intense light sources, as this won’t further enhance charging and isn’t necessary. Charging time varies depending on light intensity and the watch’s current power reserve.
Regular wear is often sufficient to keep the watch fully charged. If the watch has been stored in darkness for an extended period, expose it to bright light for several hours to restore full functionality. Remember, Eco-Drive eliminates the need for traditional battery replacements!
Checking the Power Reserve
Your Citizen Skyhawk Eco-Drive features a power reserve indicator, typically displayed on the dial. This indicator shows the current energy level stored within the watch.
The indicator usually consists of several segments or a hand that moves across a scale. A full charge is indicated when all segments are illuminated or the hand points to the ‘H’ or ‘Full’ mark.
As the watch discharges, the segments will decrease or the hand will move towards the ‘Low’ or ‘E’ mark. Regularly monitoring the power reserve helps ensure your watch remains operational. If the reserve is low, expose the watch to light to recharge it.
Low Charge Indicator and Recovery
A low charge indicator signals that your Citizen Skyhawk Eco-Drive requires light exposure. Typically, the seconds hand will move in two-second intervals instead of the usual one-second ticks. This indicates insufficient power to operate all functions optimally.
Prolonged low charge can lead to the watch entering ‘Power Save’ mode, where certain functions are disabled to conserve energy. To recover, expose the watch to bright light – sunlight, fluorescent, or incandescent – for several hours.
Consistent charging ensures reliable operation. Avoid prolonged periods of darkness. Regularly checking the power reserve and addressing low charge promptly will maximize your watch’s lifespan and functionality.

Troubleshooting Common Issues
This section details solutions for typical problems, including correcting the reference position, resolving synchronization errors, and addressing general operational difficulties.
A symptom and remedies guide is provided for quick diagnosis and effective resolution of issues with your Citizen Skyhawk Eco-Drive.
Symptom and Remedies Guide
Problem: Watch not keeping accurate time. Remedy: Ensure radio signal reception is possible; check the reference position and correct if needed. Verify daylight saving time settings are accurate for your location. If issues persist, attempt a manual time synchronization.
Problem: Low charge indicator displaying. Remedy: Expose the watch to sufficient light – natural or artificial. Avoid prolonged periods in darkness. A full charge may take several hours depending on light intensity.
Problem: Chronograph not functioning correctly. Remedy: Reset the chronograph to zero. Confirm the chronograph buttons are functioning properly; If the issue continues, a service appointment may be necessary.
Problem: Alarm not sounding. Remedy: Verify the alarm is activated and the set time is correct. Ensure the watch has sufficient charge to power the alarm function. Check for any accidental deactivation.
Checking and Correcting the Reference Position
The reference position is crucial for accurate radio-controlled time synchronization. Your Skyhawk needs to establish a connection with a time signal transmitter. Ensure you are in an area with good reception, away from obstructions like tall buildings or dense foliage.
To check: Initiate a time synchronization attempt. If unsuccessful after several tries, manually adjust the watch’s position – try different orientations and locations. The watch automatically searches for a signal at night.
Correction: If consistently failing, verify your location settings within the watch are correct. Some models allow manual selection of the transmitter. A stable signal is indicated by a successful synchronization.
Resetting the Watch to Factory Settings

Resetting your Citizen Skyhawk to factory settings should be a last resort, used only when experiencing persistent, unresolvable issues. This process erases all personalized settings, restoring the watch to its original out-of-the-box configuration.
Procedure: The exact method varies by model. Typically, it involves holding specific buttons simultaneously for a prolonged period – consult your specific model’s manual for precise instructions.
Caution: This will clear world time settings, alarm configurations, and any customized preferences. Be aware that you will need to re-enter your location and preferences afterward.
Recommendation: Before resetting, attempt simpler troubleshooting steps. Back up any important settings if possible, and ensure sufficient charge before initiating the reset.

Watch Handling and Precautions
Proper care ensures longevity. Avoid harsh chemicals, extreme temperatures, and strong impacts. Regularly clean with a soft cloth to maintain its appearance and function.
Water resistance is crucial; adhere to the specified depth rating for your model to prevent damage.
Water Resistance Information
Citizen Skyhawk Eco-Drive watches offer varying degrees of water resistance, indicated by ATM (atmospheres) or meters. Understanding these ratings is vital for preventing water damage. A rating of 3 ATM or 30 meters signifies resistance to splashes and light rain, but is not suitable for swimming or showering.
Watches rated 5 ATM or 50 meters can withstand brief immersion in water, like showering or swimming in shallow water. However, prolonged exposure or high-impact water activities are not recommended. 10 ATM or 100 meters provides suitability for swimming, snorkeling, and water sports, but avoid diving.
Higher ratings, such as 20 ATM or 200 meters, are designed for scuba diving. Regularly inspect the crown and seals for proper function. Note that water resistance is not permanent and can diminish over time due to wear and tear. Have your watch professionally checked periodically.
Cleaning and Maintenance Tips
To maintain your Citizen Skyhawk Eco-Drive’s appearance and functionality, regular cleaning is essential. Use a soft, damp cloth to wipe the case and bracelet, removing dirt and grime. Avoid harsh chemicals, solvents, or abrasive cleaners, as these can damage the finish. For stubborn stains, a mild soap solution can be used, followed by thorough rinsing with clean water.
Pay attention to the bracelet links, ensuring they are free of debris. Periodically check the crown and pushers for smooth operation. Avoid exposing your watch to extreme temperatures or strong magnetic fields. Professional servicing every few years is recommended to ensure optimal performance and water resistance.
Proper care extends the life of your timepiece, preserving its accuracy and aesthetic appeal. Store your watch in a cool, dry place when not in use.
Battery Life and Replacement (if applicable)
The Citizen Skyhawk Eco-Drive, as the name suggests, is powered by light, eliminating traditional battery replacements. However, it contains a rechargeable lithium-ion capacitor that stores energy converted from light. This capacitor’s lifespan is substantial, typically lasting for many years with proper care and sufficient light exposure.
If the watch’s power reserve consistently remains low, despite adequate light exposure, it may indicate a problem with the capacitor or charging system. In such cases, professional servicing is recommended. Citizen service centers can assess and replace the capacitor if necessary.
Unlike quartz watches with conventional batteries, the Eco-Drive doesn’t require periodic battery changes, offering a sustainable and convenient ownership experience.

Resources and Further Information
Access the official Citizen website for comprehensive manuals, FAQs, and support. Downloadable PDFs and online resources provide detailed assistance with your Skyhawk Eco-Drive.
Explore online forums and communities for user tips and troubleshooting advice regarding your specific Citizen watch model.
Official Citizen Website and Manual Downloads
Citizen’s official website is the primary source for all Skyhawk Eco-Drive related documentation. You can find a vast library of downloadable manuals, categorized by model number, ensuring you access the correct instructions for your specific watch.
These manuals typically cover every aspect of operation, from basic time and calendar setting to advanced features like the chronograph, alarm, and world time functions. Furthermore, the website offers detailed explanations of the Eco-Drive technology, including charging procedures and power reserve indicators.
Direct links to manual downloads are often available through the support section of the site, or by searching using your watch’s model number (e.g., JY0040-59L). Citizen also provides FAQs and troubleshooting guides to address common user issues, offering a self-service approach to resolving problems.
Frequently Asked Questions (FAQ)
A common question is regarding the watch’s charging process; Skyhawks require light exposure to function, but direct sunlight isn’t necessary – bright indoor light suffices. Users often inquire about the power reserve, typically lasting several months with a full charge.
Another frequent concern involves radio-controlled time synchronization, and why it sometimes fails – obstructions or distance from a signal tower can be factors. Regarding the chronograph, questions arise about lap time accuracy and resetting the function correctly.
Many ask about water resistance, and whether it’s safe for swimming or diving. Finally, troubleshooting issues like a non-responsive display or incorrect time settings are common, often resolved by a reset or checking the reference position.