CASIO 5728 Watch with Digital Display Installation Guide

CASIO 5728 Watch with Digital Display

Specifications

• Model: MA2403-EA
• Operation Guide: 5728
• Water Resistance: Up to 20 Atmospheres

Product Usage Instructions

Precautions

Operating Precautions

Ensure you understand the water resistance level of your watch and follow the guidelines provided for daily use.

User Maintenance

To maintain water resistance, replace gaskets every two to three years and have the watch inspected by a trained technician when replacing the battery.

Battery

Always request battery replacement from your original retailer or an authorized service center to ensure water resistance is maintained.

Before Getting Started…

General Guide

Familiarize yourself with the watch face items and how to use the crown for adjustments.

Charging

Understand the movement of the watch and learn how to charge it effectively for optimal performance.

Linking with a Phone

Learn how to link your watch with a phone for various features like auto time correction and phone finder.

Time Correction

Understand the different methods for time correction using time signals and watch operations.

Adjusting Hand and Day Indicator Alignment

Use CASIO WATCHES to adjust hand and day indicator alignment as needed for accurate timekeeping.

Other Information

Refer to the City Table and Summer Time Table for additional information on supported phones and specifications.

FAQs

• Q: How often should I replace the gaskets for water resistance?
  • A: It is recommended to replace the gaskets every two to three years to maintain water resistance.
• Q: Can I wear the watch during swimming activities?
  • A: Depending on the water resistance rating, you can wear the watch for activities like swimming, but avoid diving with air\ tanks.

MA2403-EA

© 2024 CASIO COMPUTER CO., LTD.
Watch Operation Guide 5728

OPUM-I

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Watch Operation Guide 5728

Precautions

Operating Precautions

Water Resistance
The information below applies to watches with WATER RESIST or WATER RESISTANT marked on the back cover.

Water Resistance Under Daily Use

Marking on watch front or on back cover
Example of Daily Use

No BAR mark

Hand washing, rain

Yes

Water-related work, swimming

No

Windsurfing

No

Skin diving

No

Enhanced Water Resistance Under Daily Use 5 Atmospheres

Marking on watch front or on back cover
Example of Daily Use

5BAR

Hand washing, rain

Yes

Water-related work, swimming Yes

Windsurfing

No

Skin diving

No

10 Atmospheres

Marking on watch front or on back cover
Example of Daily Use

10BAR

Hand washing, rain

Yes

Water-related work, swimming Yes

Windsurfing

Yes

Skin diving

Yes

20 Atmospheres

Marking on watch front or on back cover
Example of Daily Use

20BAR

Hand washing, rain

Yes

Water-related work, swimming Yes

Windsurfing

Yes

Skin diving

Yes

Do not use your watch for scuba diving or other types of diving that requires air tanks.
Watches that do not have WATER RESIST or WATER RESISTANT marked on the back cover are not protected against the effects of sweat. Avoid using such a watch under conditions where it will be exposed to large amounts of sweat or moisture, or to direct splashing with water.
Even if a watch is water resistant, note the usage precautions described below. Such types of use reduce water resistance performance and can cause fogging of the glass. Do not operate the crown or buttons while your watch is submersed in water or wet. Avoid wearing your watch while in the bath. Do not wear your watch while in a heated swimming pool, sauna, or any other high temperature/high humidity environment. Do not wear your watch while washing your hands or face, while doing housework, or while performing any other task that involves soaps or detergents.
After submersion in seawater, use plain water to rinse all salt and dirt from your watch.
To maintain water resistance, have the gaskets of your watch replaced periodically (about once every two or three years).
A trained technician will inspect your watch for proper water resistance whenever you have its battery replaced. Battery replacement requires the use of special tools. Always request battery replacement from your original retailer or from an authorized CASIO service center.
Some water-resistant watches come with fashionable leather bands. Avoid swimming, washing, or any other activity that causes direct exposure of a leather band to water.

The inside surface of the watch glass may fog when the watch is exposed to a sudden drop in temperature. No problem is indicated if the fogging clears up relatively quickly. Sudden and extreme temperature changes (such as coming into an air conditioned room in the summer and standing close to an air conditioner outlet, or leaving a heated room in the winter and allowing your watch to come into contact with snow) can cause it to take longer for glass fogging to clear up. If glass fogging does not clear up or if you notice moisture inside of the glass, immediately stop using your watch and take it to your original retailer or to an authorized CASIO service center.
Your water-resistant watch has been tested in accordance with International Organization for Standardization regulations.
Band
Tightening the band too tightly can cause you to sweat and make it difficult for air to pass under the band, which can lead to skin irritation. Do not fasten the band too tightly. There should be enough room between the band and your wrist so you can insert your finger.
Deterioration, rust, and other conditions can cause the band to break or come off of your watch, which in turn can cause band pins to fly out of position or to fall out. This creates the risk of your watch falling from your wrist and becoming lost, and also creates the risk of personal injury. Always take good care of your band and keep it clean.
Immediately stop using a band if you even notice any of the following: loss of band flexibility, band cracks, band discoloration, band looseness, band connecting pin flying or falling out, or any other abnormality. Take your watch to your original retailer or to a CASIO service center for inspection and repair (for which you will be charged) or to have the band replaced (for which you will be charged).

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Watch Operation Guide 5728

Temperature
Never leave your watch on the dashboard of a car, near a heater, or in any other location that is subject to very high temperatures. Do not leave your watch where it will be exposed to very low temperatures. Temperature extremes can cause your watch to lose or gain time, to stop, or otherwise malfunction.
Impact
Your watch is designed to withstand impact incurred during normal daily use and during light activity such as playing catch, tennis, etc. Dropping your watch or otherwise subjecting it to strong impact, however, can lead to malfunction. Note that watches with shock-resistant designs (GSHOCK, BABYG, GMS) can be worn while operating a chain saw or engaging in other activities that generate strong vibration, or while engaging in strenuous sports activities (motocross, etc.)
Magnetism
The hands of analog and combination (analog-digital) watches are moved by a motor that uses magnetic force. When such a watch is close to a device (audio speakers, magnetic necklace, cell phone, etc.) that emits strong magnetism, the magnetism can cause timekeeping to slow down, speed up, or stop, resulting in the incorrect time being displayed.
Very strong magnetism (from medical equipment, etc.) should be avoided because it can cause malfunction of your watch and damage to electronic components.
Electrostatic Charge
Exposure to very strong electrostatic charge can cause your watch to display the wrong time. Very strong electrostatic charge even can damage electronic components.

Chemicals
Do not allow your watch to come into contact with thinner, gasoline, solvents, oils, or fats, or with any cleaners, adhesives, paints, medicines, or cosmetics that contain such ingredients. Doing so can cause discoloration of or damage to the resin case, resin band, leather, and other parts.
Storage
If you do not plan to use your watch for a long time, thoroughly wipe it free of all dirt, sweat, and moisture, and store it in a cool, dry place.
Resin Components
Allowing your watch to remain in contact with other items or storing it together with other items for long periods while it is wet can cause color on resin components to transfer to the other items, or the color of the other items to transfer to the resin components of your watch. Be sure to dry off your watch thoroughly before storing it and make sure it is not in contact with other items.
Leaving your watch where it is exposed to direct sunlight (ultraviolet rays) for long periods or failure to clean dirt from your watch for long periods can cause it to become discolored.
Friction caused by certain conditions (strong external force, sustained rubbing, impact, etc.) can cause discoloration of painted components.
If there are printed figures on the band, strong rubbing of the printed area can cause discoloration.
Leaving your watch wet for long periods can cause fluorescent color to fade. Wipe the watch dry as soon as possible after it becomes wet.
Semi-transparent resin parts can become discolored due to sweat and dirt, and if exposed to high temperatures and humidity for long periods.
Daily use and long-term storage of your watch can lead to deterioration, breaking, or bending of resin components. The extent of such damage depends on usage conditions and storage conditions.

Leather Band
Allowing your watch to remain in contact with other items or storing it together with other items for long periods while it is wet can cause the color of the leather band to transfer to the other items or the color of the other items to transfer to the leather band. Be sure to dry off your watch thoroughly with a soft cloth before storing it and make sure it is not in contact with other items.
Leaving a leather band where it is exposed to direct sunlight (ultraviolet rays) for long periods or failure to clean dirt from a leather band for long periods can cause it to become discolored.
CAUTION: Exposing a leather band to rubbing or dirt can cause color transfer and discoloration.
Metal Components
Failure to clean dirt from metal components can lead to formation of rust, even if components are stainless steel or plated. If metal components exposed to sweat or water, wipe thoroughly with a soft, absorbent cloth and then place the watch in a well-ventilated location to dry.
Use a soft toothbrush or similar tool to scrub the metal with a weak solution of water and a mild neutral detergent, or with soapy water. Next, rinse with water to remove all remaining detergent and then wipe dry with a soft absorbent cloth. When washing metal components, wrap the watch case with kitchen plastic wrap so it does not come into contact with the detergent or soap.
Bacteria and Odor Resistant Band
The bacteria and odor resistant band protects against odor generated by the formation of bacteria from sweat, which ensures comfort and hygiene. In order to ensure maximum bacteria and odor resistance, keep the band clean. Use an absorbent soft cloth to thoroughly wipe the band clean of dirt, sweat, and moisture. A bacteria and odor resistant band suppresses the formation of organisms and bacteria. It does not protect against rash due to allergic reaction, etc.
Note that CASIO Computer Co., Ltd. assumes no responsibility for any damage or loss suffered by you or any third party arising through the use of your watch or its malfunction.

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Watch Operation Guide 5728

User Maintenance

Caring for Your Watch
Remember that you wear your watch next to your skin, just like a piece of clothing. To ensure your watch performs at the level for which it is designed, keep it clean by frequently wiping with a soft cloth to keep your watch and band free of dirt, sweat, water and other foreign matter.
Whenever your watch is exposed to sea water or mud, rinse it off with clean fresh water.
For a metal band or a resin band with metal parts, use a soft toothbrush or similar tool to scrub the band with a weak solution of water and a mild neutral detergent, or with soapy water. Next, rinse with water to remove all remaining detergent and then wipe dry with a soft absorbent cloth. When washing the band, wrap the watch case with kitchen plastic wrap so it does not come into contact with the detergent or soap.
For a resin band, wash with water and then wipe dry with a soft cloth. Note that sometimes a smudge like pattern may appear on the surface of a resin band. This will not have any effect on your skin or clothing. Wipe with a cloth to remove the smudge pattern.
Clean water and sweat from a leather band by wiping with a soft cloth.
Not operating a watch crown, buttons, or rotary bezel could lead to later problems with their operation. Periodically rotate the crown and rotary bezel, and press buttons to maintain proper operation.

Dangers of Poor Watch Care
Rust
Though the metal steel used for your watch is highly rust-resistant, rust can form if your watch is not cleaned after it becomes dirty. Dirt on your watch can make it impossible for oxygen to come into contact with the metal, which can lead to breakdown of the oxidization layer on the metal surface and the formation of rust.
Rust can cause sharp areas on metal components and can cause band pins to fly out of position or to fall out. If you ever notice any abnormality immediately stop using your watch and take it to your original retailer or to an authorized CASIO service center.
Even if the surface of the metal appears clean, sweat and rust in crevasses can soil the sleeves of clothing, cause skin irritation, and even interfere with watch performance.
Premature Wear
Leaving sweat or water on a resin band or bezel, or storing your watch an area subject to high moisture can lead to premature wear, cuts, and breaks.
Skin Irritation
Individuals with sensitive skin or in poor physical condition may experience skin irritation when wearing a watch. Such individuals should keep their leather band or resin band particularly clean. Should you ever experience a rash or other skin irritation, immediately remove your watch and contact a skin care professional.

Battery
The special rechargeable battery used by your watch is not intended to be removed or replaced by you. Use of a rechargeable battery other than the special one specified for your watch can damage your watch.
The rechargeable (secondary) battery is charged when the solar panel is exposed to light, so it does not require regular replacement as the primary battery requires. Note, however, that long use or operating conditions can cause the capacity or charging efficiency of the rechargeable battery to deteriorate. If you feel that the amount of operation provided by charging is too short, contact your original retailer or CASIO service center.

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Watch Operation Guide 5728

Mobile Link Precautions
Legal Precautions
This watch complies with or has received approval under the radio laws of various countries and geographical areas. Using this watch in an area where it does not comply with or has not received approval under applicable radio laws may be a criminal offense. For details, visit the CASIO Website. https://world.casio.com/ce/BLE/
Use of this watch inside of aircraft is restricted under the aviation laws of each country. Be sure to follow the instructions of airline personnel.
Precautions when using Mobile Link
When using this watch in combination with a phone, keep the watch and phone close to each other. A range of two meters is recommended as a guideline, but the local environment (walls, furniture, etc.), the structure of a building, and other factors may require a much closer range.
This watch can be affected by other devices (electrical devices, audio-visual equipment, office equipment, etc.) In particular, it can be affected by operation of a microwave oven. The watch may not be able to communicate normally with a phone if a microwave oven is operating nearby. Conversely, this watch may cause noise in radio reception and the video image of a TV.
Bluetooth of this watch uses the same frequency band (2.4 GHz) as wireless LAN devices, and use of such devices in close proximity of this watch may result in radio interference, slower communication speeds and noise for the watch and the wireless LAN device, or even communication failure.

Stopping Radio Wave Emission by This Watch
The watch is emitting radio waves whenever the second hand is pointing to [C]. Even if the second hand is not pointing at [C], the watch will automatically attempt to connect with a phone four times a day to adjust its time settings.
When in a hospital, on an aircraft, or in any other area where the use of radio waves is not allowed, use the operation below to stop radio wave generation.
Stopping Radio Wave Generation Press (A) to terminate the Bluetooth connection.

Connected

Disconnected

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Disabling Auto Time Correction Configure CASIO WATCHES phone app settings to disable synchronization between the watch and phone. l Using the CASIO WATCHES Phone App to Disable Auto Time Correction

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Watch Operation Guide 5728

Before Getting Started…
This section provides an overview of the watch and introduces convenient ways it can be used.
Watch Features Phone Linking
The watch supports connection and communication with a Bluetooth capable phone. Solar Charging Sunlight and artificial light generate electricity for watch operation as it charges. Time Signal Reception The watch receives a radio signal containing time information and uses it to keep its time setting accurate.
Note
The illustrations included in this operation guide have been created to facilitate explanation. An illustration may differ somewhat from the item it represents.

General Guide

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AHour hand BMinute hand CDay indicator DSecond hand ECrown A button Hold down to connect the watch with a phone.

Watch Face Items

ALast receive result/Auto time correction setting
The second hand points to [Y(YES)] or [N(NO)] to indicate the result of the last auto time correction operation based on time signal reception or connection with a phone. [Y(YES)]: Auto time correction successful [N(NO)]: Auto time correction failed
The second hand indicates whether auto time correction is enabled or disabled. [Y(YES)]: Auto time correction enabled [N(NO)]: Auto time correction disabled
B[RC] The second hand points to this mark while calibration signal reception is in progress.
C[C] The second hand points to this mark while there is a connection between the watch and a phone.
DSummer time setting The second hand points to the current summer time setting.

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Watch Operation Guide 5728

Using the Crown
Pulling Out and Pushing In the Crown To perform a crown operation, pull it out to the first or second click and then rotate it. Do not pull the crown with too much force. First click
Normal timekeeping
Second click

Stopping Fast Forward/Fast Reverse Rotate the crown in the direction opposite that of the ongoing operation or press any button.
Note
If you do not perform any operation for about two minutes after pulling out the crown, crown operations will automatically become disabled. If that happens, push the crown back in and then pull it out again.
Day Indicator Movement

Charging
This watch runs on power supplied from a rechargeable (secondary) battery that is charged by a solar panel. The solar panel is integrated into the face of the watch, and power is generated whenever the face is exposed to light.
Charging the Watch When you are not wearing the watch, put it in a location where it is exposed to bright light.

Day indicator

Important!
To prevent loss of water resistance and/or damage due to impact, be sure to push the crown back in after you are finished using it.
When pushing the crown back in, take care not to apply too much force.
Fast Forward/Fast Reverse After pulling out the crown to the second click, rotating it quickly in succession in either direction will start a fast forward or fast reverse operation. While adjusting the time setting manually using watch operations, rotating the crown quickly in succession again while a fast forward operation is in progress will cause the hour and minute hands to move faster.
Note
The second hand cannot be fastforwarded or fast-reversed.

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It can take anywhere from about 10 to 40 seconds for the day indicator to change after timekeeping reaches midnight.
The day may not be indicated correctly while the watch’s crown is pulled out.

While you are wearing the watch, make sure that its face (solar panel) is not blocked from light by the sleeve of your clothing. Power generation efficiency is reduced even when the face of the watch is blocked only partially.

YES

NO

Important!
Some light sources and environments can cause the watch to become extremely hot during charging, which creates the risk of burn injury and damage to internal watch components. Avoid charging the watch under conditions like the ones described below, where the temperatures may exceed 60 °C (140 °F). On the dashboard of a vehicle parked in the sun Near incandescent lamps, camera lights, halogen lamps, or other sources of heat In locations exposed to direct sunlight for long periods and other hot locations

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Watch Operation Guide 5728

Remaining Charge and Dead Battery You can determine if the charge level is low by checking the hand movement. Functions become disabled as battery power goes low.
Important! Should the battery go low or go dead,
expose the face (solar panel) to light as soon as possible.
Note Exposing the watch face to light after
the battery goes dead will cause the second hand to revolve counterclockwise until it stops at second 57. This indicates charging has started.
Low Battery Power The second hand jumps at two-second intervals.
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Second hand
Dead Battery All hands and the day indicator are stopped.
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Charging Time Guidelines

The table below shows guidelines for approximate charging times.

Charging Times Required for 1 Day of Operation

Light Level (Lux)
50,000 10,000 5,000
500

Approximate Charging Time
8 minutes 30 minutes 48 minutes
8 hours

Charge Recovery Times Sunny day, outdoors (50,000 lux)

Dead battery n Medium charge Medium charge n High charge High charge n Full charge

2 hours 18 hours 5 hours

Sunny day, near a window (10,000 lux)

Dead battery n Medium charge Medium charge n High charge High charge n Full charge

6 hours 66 hours 18 hours

Overcast day, near a window (5,000 lux)

Dead battery n Medium charge Medium charge n High charge High charge n Full charge

8 hours 107 hours 29 hours

Indoor fluorescent lighting (500 lux)

Dead battery n Medium charge Medium charge n High charge High charge n Full charge

94 hours –

Note

Actual charging time depends on the charging environment, watch settings, and other factors.

Power Saving Leaving the watch in a dark location for about one hour between the hours of 10 p.m. and 5:50 a.m. will cause the second hand to stop (hand sleep), and the watch to enter Level 1 power saving. If the watch is left in this condition for six or seven days, all hands will stop and the watch will enter Level 2 power saving. Level 1 : Basic timekeeping functions are operational. Level 2 : Only the day indicator is operational.
Note
Note that the watch also may enter the power saving state if its face is blocked from light by your sleeve while you are wearing it.
Recovering from Power Saving Operation
To recover from power saving, perform one of the following operations: press (A), perform a crown operation, or place the watch in a welllit area.
Useful Features
Pairing the watch with your phone makes a number of the watch’s features easier to use. Auto time correction l Auto Time Correction
12:30
In addition, a number of other watch settings can be configured using your phone. To transfer data to a watch and to configure settings, you first need to pair the watch with your phone. l Getting Ready Your phone needs to have the “CASIO
WATCHES” phone app installed to pair with the watch.

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Watch Operation Guide 5728

Linking with a Phone
While there is a Bluetooth connection between the watch and phone (Mobile Link), the watch’s current time setting is corrected automatically. You can also change the watch’s other settings.
Note
This function is available only while the CASIO WATCHES phone app is running on the phone.
This section describes watch and phone operations. X : Watch operation Y : Phone operation
Getting Ready
To use your watch in combination with a phone, you first need to pair them. Perform the steps below to pair the watch with a phone.
A Install the required app on your phone.
In Google Play or the App Store, search for the “CASIO WATCHES” phone app and install it on your phone.
B Configure Bluetooth settings. Enable the phone’s Bluetooth.
Note
For details about setting procedures, see your phone documentation.

C Pair the watch with a phone. Before you can use the watch in combination with a phone, you first need to pair them.
1. Move the phone to be paired with close to (within one meter of) the watch.
2. Y Tap the “CASIO WATCHES” icon. 3. Y Tap the of the “My Watch” tab.
4. Y Perform the operation shown on the phone screen to register the watch to the CASIO WATCHES phone app.
5. X Hold down (A) for at least 2.5 seconds until the second hand points to [C]. When a connection is established between the watch and phone, the second hand moves to [C]. If pairing fails, the watch returns to the state it was in before starting this procedure. Perform the pairing procedure again from the beginning.
Note
The first time you start up the CASIO WATCHES phone app, a message will appear on your phone asking if you want to enable location information acquisition. Configure settings to allow background use of location information.

Auto Time Correction
The watch will connect with a phone at preset times each day and adjust its time settings. Using This Function Your watch adjusts its time setting four times a day according to a preset schedule. It performs the adjustment operation automatically as you go about your daily life, without any operation required by you.
12:30
Important!
The watch may not be able to perform auto time correction under the conditions described below. While the watch is too far away from its paired phone While communication is not possible due to radio interference, etc. While the phone is updating its system While the CASIO WATCHES phone app is not running on the phone
Note
If the watch does not indicate the correct time even if it is able to connect with a phone, adjust the hand and day indicator positions. l Adjusting Hand and Day Indicator Alignment
The watch will connect with the phone and perform auto time correction at around 12:30 a.m., 6:30 a.m., 12:30 p.m. and 6:30 p.m. The connection is automatically terminated after auto time correction is complete.

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Watch Operation Guide 5728

Triggering Immediate Time Correction
The watch’s time setting will be corrected automatically whenever you establish a connection between the watch and a phone. Whenever you want to trigger immediate time correction, perform the procedure below to connect with a phone.
1. Move the phone close to (within one meter of) the watch.
2. X Hold down (A) for at least 0.5 seconds until the second hand points to [C]. Release the button as soon as the second hand points to [C].
When the watch connects with a phone, the second hand performs one revolution and then points to [C] again. Next, the watch’s time setting is adjusted.
At this time your current location is recorded by your phone.
The connection is terminated automatically after time correction is complete.

Connected

After time correction

Phone Finder
You can use phone finder to trigger a tone on the phone to make it easy to find. The tone is forced to sound even if the phone is in vibrate mode.
Important!
Phone finder will not sound the tone unless the CASIO WATCHES phone app is running on the phone.
Do not use this function in areas where phone call tones are restricted.
The tone sounds at a high volume. Do not use this function when listening to phone output over earphones.

1. X If the watch is connected with a phone, press (A) to terminate the connection.

Connected

Disconnected

Configuring Watch Settings
You can use CASIO WATCHES to specify the amount of time until the Bluetooth connection is automatically terminated, and to configure other settings. 1. Y Tap the “CASIO WATCHES” icon. 2. X Hold down (A) for at least 2.5 seconds.
This establishes a connection between the watch and phone.
3. Y Select the setting you want to change and then perform the operation shown on the phone screen.

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Changing the summer time

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setting

Adjusting Hand and Day Indicator Alignment
If the hands and/or day indicator are out of alignment even though auto time correction is being performed, you can use the CASIO WATCHES phone app to adjust them.
1. Y Tap the “CASIO WATCHES” icon.
2. X Hold down (A) for at least 2.5 seconds. This establishes a connection between the watch and phone.

2. X Hold down (A) for at least 5 seconds until the second hand points to [C]. A connection will be established between the watch and phone, and then the phone’s ringtone will sound. It will take a few seconds before the phone tone sounds.
3. X Press (A) to stop the tone. You can press any watch button to stop the phone tone, but only during the first 30 seconds after it starts to sound.

1. Y Tap the “CASIO WATCHES” icon. 2. X Hold down (A) for at least 2.5 seconds.
This establishes a connection between the watch and phone.
3. Y Perform the operation shown on the phone screen to change the summer time setting.

3. Y Perform the operation shown on the phone screen to correct hand and day indicator alignment.

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Watch Operation Guide 5728

Checking the Watch Charge Level
Use the procedure below to check the current charge level with CASIO WATCHES.
1. Y Tap the “CASIO WATCHES” icon. 2. X Hold down (A) for at least 2.5 seconds.
This establishes a connection between the watch and phone.
3. Y Use CASIO WATCHES to check the charge level.
Recording Your Current Location (TIME&PLACE)
While traveling or otherwise on the go, you can use the procedure below to record your current location, along with the time and date, on your phone. Recorded location information can be viewed on the CASIO WATCHES phone app map while the watch is connected with your phone. Recording Your Current Location
1. X Hold down (A) for at least 0.5 seconds until the second hand points to [C]. Release the button as soon as the second hand points to [C]. This records, in phone memory, the latitude and longitude of the location you are in when you press the button, along with the date and time. When location recording is successful, the second hand performs one revolution and then points to [C] again. Next, watch syncs its time setting with your phone.
Viewing a Recorded Location on a Map
1. Y Tap the “CASIO WATCHES” icon. 2. Y Perform the operation shown on the
phone screen to view recorded location information.
Note
You can use the CASIO WATCHES phone app to delete recorded location information.

Connection

Connecting with a Phone This section explains how to establish a Bluetooth connection with a phone that is paired with the watch. If the watch is not paired with the phone you
want to connect with, refer to the information below and pair them. l C Pair the watch with a phone.
1. Move the phone close to (within one meter of) the watch.
2. X Hold down (A) for at least 2.5 seconds. This establishes a connection between the watch and phone.
Important!
If you have problems establishing a connection, it could mean that the CASIO WATCHES phone app is not running on your phone. On your phone’s home screen, tap the “CASIO WATCHES” icon. After the app starts up, hold down the watch’s (A) button for at least 2.5 seconds.
Note
The connection will be terminated if you do not perform any operation on the watch or phone for a fixed amount of time. To specify the connection limit time, perform the following operation with the CASIO WATCHES phone app: “Watch settings” n “Connection time with the app”. Next, select a setting of 3 minutes, 5 minutes, or 10 minutes.

Disconnecting from Your Phone
Pressing (A) terminates the Bluetooth connection and returns the second hand to its normal operation.

Connected

Disconnected

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Using the Watch in a Medical Facility or Aircraft
Whenever you are in a hospital, on an aircraft, or in any other location where auto time calibration signal receive or connection with a phone may cause problems, you can perform the procedure below to disable auto time correction. To re-enable auto time correction, perform the same operation again.
1. Y Tap the “CASIO WATCHES” icon.
2. X Hold down (A) for at least 2.5 seconds. This establishes a connection between the watch and phone.

3. Y Perform the operation shown on the phone screen to enable or disable auto time correction.

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Watch Operation Guide 5728

Unpairing Unpairing the watch from a phone requires both CASIO WATCHES and watch operations.
Deleting Pairing Information from the CASIO WATCHES phone app
1. X If the watch is connected with a phone, press (A) to terminate the connection.

Connected

Disconnected

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Time Correction
Your watch can obtain date and time information by connecting with a phone and by receiving time signals, which it uses to adjust its settings.
Important!
Disable auto time correction whenever you are inside an aircraft or in any other area where radio wave reception is prohibited or restricted. l Using CASIO WATCHES to Configure Settings l Using Watch Operations to Configure Settings

Referring to the information below, configure the time setting in accordance with the method that suits your own lifestyle.
Do you use a phone? Time correction by connecting with your phone is recommended. l Auto Time Correction
12:30

2. Y Tap the “CASIO WATCHES” icon.
3. Y Perform the operation shown on the phone screen to unpair.
Deleting Pairing Information from the Watch
1. X Pull out the crown to the first click.
2. X Hold down (A) for at least 10 seconds. This deletes the pairing information. The second hand will point to [C].

Can you receive a time signal in your area?
If you are able to receive a time signal, time settings can be adjusted in accordance with a received signal. l Time Calibration Signal Reception
Ranges l Setting a Home City

Crown
3. X Push the crown back in.
If you purchase another phone You need to perform the pairing operation whenever you want to establish a Bluetooth connection with a phone for the first time. l Deleting Pairing Information from the
Watch l C Pair the watch with a phone.

Other than the above.
If you are unable to connect with a phone and are unable to receive a time signal, you can perform watch button operations to adjust its time setting. l Using Watch Operations to Adjust the
Time Setting

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Watch Operation Guide 5728

Time Correction Using a Time Signal
Overview
The watch’s time and day settings can be configured in accordance with a received time calibration signal.
Important!
In order to make it possible for the current time setting to be adjusted correctly based on time calibration signal reception, you need to specify the time zone where you are using the watch. l Setting a Home City
If the watch was unable to connect with a phone even once for time correction during the previous day while connection with a phone is being used, it will automatically try to receive a time calibration signal.
Disable auto time correction whenever you are inside an aircraft or in any other area where radio wave reception is prohibited or restricted. l Using CASIO WATCHES to Configure Settings l Using Watch Operations to Configure Settings
Note
Areas where time calibration signal reception is supported are limited. When the watch is in an area where time calibration signal reception is not possible, connect with a phone to adjust time and day settings. l Time Calibration Signal Reception Ranges
If the watch does not indicate the correct time even after it receives a time calibration signal, correct the hand and day indicator positions. l Using CASIO WATCHES to Adjust Alignment l Using Watch Operations to Correct Hand Positions

Appropriate Signal Reception Location A time calibration signal can be received while the watch is near a window. Position the watch so its 12 o’clock side is facing the window. Keep metal objects away from the watch. Do not move the watch. Do not perform any operation on the watch.
12 o’clock
Note
You may experience time calibration signal reception problems in the areas described below. Among or near buildings While riding in a vehicle Near household appliances, office machines, mobile phones, etc. On a construction site, in an airport, or any other location where radio wave interference occurs Near high-voltage lines In mountainous areas or behind a mountain

Time Calibration Signal Reception Ranges
Japan (JJY) The Japan time signal radio stations are located on Mt. Otakadoya in Fukushima and Mt. Hagane in Fukuoka/Saga. The reception range of the Japanese time signals is approximately 1,000 km from each transmission station.
China (BPC) The China time signal radio station is located in Shangqiu, Henan Province, China. The reception range of the Chinese time signal is approximately 1,500 km from the transmission station.
United States (WWVB) The United States time signal radio station is located in Fort Collins, Colorado. The reception range of the U.S. time signal is approximately 3,000 km from the transmission station.
U.K. (MSF)/Germany (DCF77) The U.K. time signal radio station is located in Anthorn, Cumbria. The German time signal radio station is located in Mainflingen, southeast of Frankfurt. The reception range of the U.K. and German time signals is approximately 1,500 km from each transmission station.
Note
Even if you are within the normal reception range of a time calibration signal, reception may be made impossible by the following factors: geographic contours, weather, the season, the time of day, wireless noise.

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Watch Operation Guide 5728

Auto Time Calibration Signal Receive
An automatic time calibration signal receive operation is performed and the time and day settings are corrected between midnight and 5:00 a.m. Once a signal receive operation is successful, no more auto receive operations are performed that day.
1. Place the watch near a window or some other location appropriate for signal reception. The second hand points to [RC] while the receive operation in progress. When the receive operation is successful, the time and day settings will be adjusted automatically.
Note
Reception takes anywhere from about two minutes to about 10 minutes. It can take as long as 20 minutes.
If the watch connects with a phone and adjusts its time setting, the watch will not perform auto receive of a time calibration signal for the rest of that day or the next day.

Manual Time Calibration Signal Receive
1. Place the watch near a window or some other location appropriate for time signal reception.
2. Hold down (A) for at least 0.5 seconds until the second hand points to [RC]. This indicates that the receive operation has started. After the receive operation is complete, the watch’s time and day settings will be corrected accordingly.
30
Note
The receive operation takes anywhere from about two minutes to about 10 minutes. It can take as long as 20 minutes.
Time calibration signal reception is better at night than during the day.
A time calibration signal cannot be received while the watch is paired with a phone.

Signal Reception Precautions
When the watch is unable to correct its time in accordance with a calibration signal for some reason, average timekeeping accuracy is within ±15 seconds per month.
Note that an internal decoding process the watch performs after it receives a signal may cause the time setting to be slightly off (by less than one second).
Time calibration signal reception is not possible under the conditions described below. While battery power is low At Power Saving Level 2 While the crown is pulled out While the Home City setting is a time zone where time signal reception is not possible While the watch is outside the time signal reception range While the watch is paired with a phone
To perform a manual time calibration signal receive operation, make sure the watch is not paired with a phone. If it is, delete the watch’s pairing information before performing the manual receive operation. l Unpairing
When the receive operation is successful, the time and/or day settings will be corrected automatically. Summer time will not be applied correctly in the case described below. When the summer time start date and time, end date and time, or other rules are changed by authorities
If your watch is connected with a phone, settings must be configured so CASIO WATCHES can acquire location information. Even if you are in an area that is within the reception range of a time signal, reception will not be performed if settings are configured in a way that makes signal reception impossible.

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Watch Operation Guide 5728

Using Watch Operations to Adjust the Time Setting
If your watch cannot connect with a phone for some reason, you can use watch operations to adjust date and time settings. Setting a Home City Use the procedure in this section to select a city (time zone) to use as your Home City.
Important!
If you do not specify the city (time zone) where you are using the watch, the current time setting will not be correct after it is adjusted based on a time calibration signal.
1. Pull out the crown to the first click. The second hand will move to the city code of the currently selected Home City.
30
Crown Home City (time zone)
2. Rotate the crown to change the Home City. You can also select a time zone whose name is not indicated on the face of the watch. For details about time zones, refer to the information below. l City Table
3. Push the crown back in.

Adjusting the Time and Day Setting
1. Pull out the crown to the second click. This enables the hour and minute setting operation. The second hand will indicate whether the current time is a.m. or p.m. The 3-second position is a.m., while the 57-second position is p.m.
a.m. (3-second position)

30

p.m. (57-second position)

Crown

2. Rotate the crown to adjust the hour and minute settings.
3. Press (A). This enables the year ten’s digit setting operation.
4. Rotate the crown to move the second hand to the desired setting for the year ten’s digit.

Year (10’s digit)

5. Press (A).
This enables the year one’s digit setting operation.

6. Rotate the crown to move the second hand to the desired setting for the year one’s digit.

Year (one’s digit)

7. Press (A). This enables the month setting operation.

Month

8. Rotate the crown to change the month. 9. Press (A).
This enables the day setting operation.

30
Day
10. Rotate the crown to change the day. To return to the hour and minute setting operation, press (A).
11. On a time signal at the top of a minute, push the crown back in.

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Watch Operation Guide 5728

Configuring the Summer Time Setting If you are in an area that observes summer time, you can also configure a summer time setting.
Note
The initial factory default summer time setting for all cities is [AT (AUTO)]. In many cases, the [AT (AUTO)] setting lets you use the watch without switching between summer time and standard time.
When performing a manual operation to select a time zone for which there is no city name displayed, use [STD] or [DST] for the summer time setting.
1. Pull out the crown to the first click. The second hand will move to the city code of the currently selected Home City.
30
Crown Home City (time zone)
2. Press (A). The second hand will move to the current summer time setting.

Checking the Last Time Correction Result
1. Press (A). The second hand will indicate the last time correction operation result. The watch hands will return to indicating the current time if you do not perform any operation for nine or ten seconds. [Y(YES)]: Last time correction operation successful. [N(NO)]: Last time correction operation failed.
30
Note
Even if there was a successful time calibration signal receive operation or connection with a phone, the second hand will point to [N(NO)] if you subsequently adjusted the time and/or date setting manually.

Using the Watch in a Medical Facility or Aircraft
Whenever you are in a hospital, on an aircraft, or in any other location where auto time calibration signal receive or connection with a phone may cause problems, you can perform the procedure below to disable auto time correction. To re-enable auto time correction, perform the same operation again.
1. Press (A). The second hand will indicate the last receive result for nine or ten seconds.
30
2. Within 10 seconds after you perform the operation in step 1, pull out the crown to the first click. If more than 10 seconds elapse before you pull out the crown after you perform the operation in step 1, the second hand will return to indicating seconds. If this happens, perform step 1 again.
3. Rotate the crown to disable auto time correction. [Y(YES)]: Auto time correction enabled [N(NO)]: Auto time correction disabled

30
Summer time setting
3. Rotate the crown to change the summer time setting. [AT (AUTO)] The watch switches between standard time and summer time automatically. [STD] The watch always indicates standard time. [DST] The watch always indicates summer time.
4. Push the crown back in.

30
Crown
4. Push the crown back in.
Note
If the watch is paired with a phone, you can use the CASIO WATCHES phone app to disable auto time correction. l Using the CASIO WATCHES Phone App to Disable Auto Time Correction

16

Watch Operation Guide 5728

Adjusting Hand and Day Indicator Alignment
Strong magnetism or impact can cause the hands and/or the day indicator to go out of alignment. If this happens, correct hand and day indicator alignment. The watch performs alignment of the hour
hand, minute hand, and second hand automatically.
Using CASIO WATCHES to Adjust Hand and Day Indicator Alignment
If the watch is paired with a phone, you can also use the CASIO WATCHES phone app to correct hand and day indicator positions. l Adjusting Hand and Day Indicator
Alignment

Adjusting Hand and Day Indicator Alignment
1. Pull out the crown to the second click.
2. Hold down (A) for at least five seconds until the second hand points to 12 o’clock . Release the button when the second hand reaches 12 o’clock. This starts auto alignment of the hour hand, minute hand, and second hand. After auto alignment is complete, the hands should be in the positions shown below.
Hour hand Minute hand

30

Second hand

Crown

3. Press (A). Confirm that the day indicator shows “1”.
Day

11

4. If “1” is not shown for the day, rotate the crown until “1” is shown for the day.
5. Push the crown back in.
Note
Leaving the crown pulled out for more than approximately 30 minutes without performing any operation will automatically cause the adjustment operation to become disabled. If this happens, push the crown back in to its normal position and then pull it out again to restart the procedure from the beginning. Pushing the crown in to its normal position part way through the alignment procedure will cause the hands to return to their normal position. Any alignment you performed up to that point will be applied.

Other Information
This section provides non-operational information you also need to know. Refer to this information as required.

City Table

You can specify a time zone whose city code is not shown on the face by aligning the second hand with the applicable UTC offset.

City code

City name

Second Hand
Position

Offset

UTC

Coordinated Universal Time

0

0

LON* London

20

PAR* Paris

4 +1

ATH* Athens

6 +2

JED Jeddah

8 +3

–

–

9 +3.5

DXB Dubai

10 +4

–

–

11 +4.5

–

–

12 +5

DEL Delhi

13 +5.5

–

–

14 +5.75

DAC Dhaka

15 +6

–

–

16 +6.5

BKK Bangkok

17 +7

HKG* Hong Kong

19 +8

–

–

21 +8.75

TYO* Tokyo

22 +9

–

–

23 +9.5

SYD Sydney

24 +10

–

–

25 +10.5

NOU Noumea

26 +11

WLG Wellington

28 +12

–

–

29 +12.75

TBU Nuku’alofa

30 +13

CXI Kiritimati

32 +14

BAR Baker Island

36 -12

PPG Pago Pago

38 -11

HNL Honolulu

40 -10

–

–

41 -9.5

ANC Anchorage

42 -9

LAX* Los Angeles

44 -8

DEN* Denver

46 -7

CHI* Chicago

48 -6

NYC* New York

50 -5

YHZ* Halifax

52 -4

–

–

53 -3.5

RIO Rio de Janeiro 54 -3

FEN

Fernando de Noronha

56 -2

RAI Praia

58 -1

• Time zones where time calibration signal reception is possible.

The information in the above table is current as of July 2023.

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Watch Operation Guide 5728

Summer Time Table

When [AT (AUTO)] is selected for a city that observes summer time, switching between standard time and summer time will be performed automatically at the timing shown in the table below.
Note
If the summer time start and end dates for your current location have been changed, they may be different from those indicated in the table below. If this happens, you can have new summer time information sent to the watch by connecting the watch with a phone. If the watch is not connected with a phone, you can change the summer time setting manually.

City name

Summer Time Start

Summer Time End

01:00, last

02:00, last

London Sunday in

Sunday in

March

October

02:00, last

03:00, last

Paris

Sunday in

Sunday in

March

October

03:00, last

04:00, last

Athens Sunday in

Sunday in

March

October

Sydney

02:00, first Sunday in October

03:00, first Sunday in April

02:00, last Wellington Sunday in
September

03:00, first Sunday in April

02:00, second 02:00, first

Anchorage Sunday in

Sunday in

March

November

Los Angeles

02:00, second 02:00, first

Sunday in

Sunday in

March

November

02:00, second 02:00, first

Denver Sunday in

Sunday in

March

November

02:00, second 02:00, first

Chicago Sunday in

Sunday in

March

November

02:00, second 02:00, first

New York Sunday in

Sunday in

March

November

02:00, second 02:00, first

Halifax Sunday in

Sunday in

March

November

The information in the above table is current as of July 2023.

Supported Phones
For information about phones that can connect with the watch, visit the CASIO website. https://world.casio.com/os_mobile/wat/

Specifications

Accuracy at normal temperature : ±15 seconds per month average when time correction by time calibration signal reception or by communication with a phone is not possible.
Timekeeping : Hour, minute, second, day (2000 to 2099 full auto calendar)
Signal Receive Functions : Auto receive, manual receive Auto transmitter selection (for JJY, MSF/ DCF77) Receivable Call Signs JJY (40kHz/60kHz), BPC (68.5kHz), WWVB (60kHz), MSF (60kHz), DCF77 (77.5kHz) Automatic and manual switching between standard time and summer time. Auto time correction enable/disable switching
Mobile Link : Auto Time Correction Time setting corrected automatically at preset time One-touch Time Correction Manual connection and time correction Phone finder Watch operation sounds the alert sound of the phone. Auto summer time setting Automatic switching between standard time and summer time Hand alignment correction TIME&PLACE Auto time correction enable/disable switching Data Communication Specifications Bluetooth® Frequency Band: 2400MHz to 2480MHz Maximum Transmission: 0 dBm (1 mW) Communication range: Up to 2 meters (depends on environment)

Other : Auto hand position correction, Power Saving, battery charge alert
Power Supply : Solar panel and one rechargeable battery
Approximate Battery Life : Approximately 5 months Conditions Not exposed to light under the conditions below. Auto time correction by smartphone: 4 times/day Hand sleep: 6 hours/day
Specifications are subject to change without notice.
Copyrights and Registered Copyrights
The Bluetooth® word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc. and any use of such marks by CASIO Computer Co., Ltd. is under license.
iPhone and App Store are trademarks of Apple Inc. in the United States and other countries.
iOS is a trademark or registered trademark of Cisco Systems, Inc.
Android and Google PlayTM are trademarks or registered trademarks of Google LLC.
Other company names and product names used herein are trademarks or registered trademarks of their respective companies.

18

Watch Operation Guide 5728

Troubleshooting

Signal Reception (Time Calibration Signal)
Q1 The watch cannot perform a receive operation.
Is the watch’s battery charged?
Signal reception is not possible while battery power is low. Keep the watch exposed to light until it recharges sufficiently. l Charging
Is auto time correction enabled?
Time signals cannot be received while auto time correction is disabled. Enable auto time correction. l Using CASIO WATCHES to Configure
Settings l Using Watch Operations to Configure
Settings
Is your Home City setting correct for your location?
The watch will not indicate the correct time if the Home City setting is wrong. Change your Home City setting so it correctly reflects your location. l Setting a Home City
After checking the above, the watch still cannot perform a receive operation.
Time calibration signal reception is not possible under the conditions described below. When watch is at Level 2 power saving When the crown is pulled out While the watch is paired with a phone For information about unpairing, see “Unpairing”. If successful reception is not possible for some reason, you can adjust the time and day settings manually.

Q2 The signal receive operation always fails.
Is the watch in a location that is appropriate for signal reception?
Check your surroundings and move the watch to a location where signal reception is better. l Appropriate Signal Reception Location
Did you avoid touching the watch while the receive operation was in progress?
Minimize movement of the watch and do not perform any watch operation while a receive operation is in progress.
Is the signal transmitter in your area transmitting a signal?
The transmitter of the time calibration may not be transmitting a signal. Try again later.
Q3 Signal reception should have been successful, but the watch’s time and/ or day is wrong.
Is the time zone where you are using the watch specified correctly?
Specify the time zone where you are using the watch. l Setting a Home City
Is the hand and/or day indicator alignment correct?
Adjust hand and/or day indicator alignment. l Adjusting Hand and Day Indicator
Alignment
After checking the above, the time and/or day settings is still wrong.
Adjust time and day settings manually. l Using Watch Operations to Adjust the
Time Setting

I can’t pair the watch with a phone.
Q1 I’ve never been able to establish a (pairing) connection between the watch and phone.
Are you using a supported phone model?
Check if the phone model and its operating system are supported by the watch. For information about supported phone models, visit the CASIO Website. https://world.casio.com/os_mobile/wat/
Did you install the CASIO WATCHES phone app on your phone?
The CASIO WATCHES phone app needs to be installed on your phone in order to connect with the watch. l A Install the required app on your
phone.
Are your phone’s Bluetooth settings configured correctly?
Configure the phone’s Bluetooth settings. For details about setting procedures, see your phone documentation. iPhone Users “Settings” n “Bluetooth” n On “Settings” n “Privacy” n “Bluetooth
Sharing” n “CASIO WATCHES” n On Android Users Enable Bluetooth.
Other than the above.
Some phones need to have BT Smart disabled to use the CASIO WATCHES phone app. For details about setting procedures, see your phone documentation. On the Home Screen, tap: “Menu” n “Settings” n “Bluetooth” n “Menu” n “BT Smart settings” n “Disable”.

19

Watch Operation Guide 5728

I can’t reconnect the watch and phone.
Q1 The watch will not re-connect with the phone after they are disconnected.
Is the CASIO WATCHES phone app running?
The watch cannot re-connect with your phone unless CASIO WATCHES is running on the phone. On your phone’s Home Screen, tap the “CASIO WATCHES” icon. Next, on the watch, hold down (A) for at least 2.5 seconds.

Q3 I can’t establish a connection after disabling the auto time correction on the watch.
On the watch, enable auto time correction and then hold down (A) for at least 2.5 seconds. l Using CASIO WATCHES to Configure
Settings l Using Watch Operations to Configure
Settings
30

Phone-Watch Connection
Q1 I can’t establish a connection between the phone and watch.
Have you tried turning your phone off and then back on again?
Turn your phone off and back on, and then tap the “CASIO WATCHES” icon. Next, on the watch, hold down (A) for at least 2.5 seconds.
30

30
Have you tried turning your phone off and then back on again?
Turn your phone off and back on, and then tap the “CASIO WATCHES” icon. Next, on the watch, hold down (A) for at least 2.5 seconds.
30
Q2 I can’t connect while my phone is in the Airplane Mode.
Connection with the watch is not possible while your phone is in the Airplane Mode. After disabling the phone’s Airplane Mode, go to the phone’s Home Screen and tap the “CASIO WATCHES” icon. Next, on the watch, hold down (A) for at least 2.5 seconds.
30

Q4 I changed the phone’s Bluetooth from enabled to disabled, and now I can’t connect anymore.
On your phone, re-enable Bluetooth, and then go to the Home Screen and tap the “CASIO WATCHES” icon. Next, on the watch, hold down (A) for at least 2.5 seconds.
30
Q5 I can’t connect after turning off the phone.
Turn your phone off and back on, and then tap the “CASIO WATCHES” icon. Next, on the watch, hold down (A) for at least 2.5 seconds.
30

Has the watch been re-paired with the phone?
After deleting pairing information from the CASIO WATCHES phone app, re-pair them. l Deleting Pairing Information from the
CASIO WATCHES phone app l C Pair the watch with a phone.
If you are unable to establish a connection…
Use the procedure below to delete the pairing information from the watch, and then re-pair the watch and phone. l Deleting Pairing Information from the
Watch l C Pair the watch with a phone.
Changing to a Different Phone Model
Q1 Connecting the current watch to another phone.
Pair the watch with the phone. l If you purchase another phone

20

Watch Operation Guide 5728

Auto Time Correction by Bluetooth Connection (Time Correction)
Q1 When does the watch correct its time?
The watch will connect with the phone and perform auto time correction at around 12:30 a.m., 6:30 a.m., 12:30 p.m. and 6:30 p.m. The connection is automatically terminated after auto time correction is complete. Also, time signal auto-receive will be performed if there has been no auto time correction based on connection between the watch and phone for more than one day.
Q2 Auto time correction is performed, but the time setting is not correct.
Is auto time correction not being performed according to its normal schedule?
Note that auto time correction is not performed for 24 hours after swapping of the Home Time and World Time, or after the time setting is corrected manually on the watch. Auto time correction will resume 24 hours after either of the above operations is performed.
Is auto time correction enabled?
Auto time correction will not be performed at the scheduled times if it is not enabled. Enable auto time correction. l Using CASIO WATCHES to Configure
Settings l Using Watch Operations to Configure
Settings
Q3 Time is not displayed correctly.
If your phone is unable to receive a signal because you are outside its service range or for some other reason, the watch may not be able to display the correct time. If this happens, connect the phone to its network and then correct the time setting.
Q4 Time signal reception is not performed while watch is connected with a phone.
The watch does not receive a time signal for time correction while it is connected with a phone. However, time signal auto-receive is performed if there has been no auto time correction based on connection between the watch and phone for more than one day.

Hand Movement and Indications
Q1 The second hand is jumping at twosecond intervals.
Battery power is low. Keep the watch exposed to light until it recharges sufficiently. l Charging
Q2 All hands are stopped and buttons do not work.
The battery is dead. Keep the watch exposed to light until it recharges sufficiently. l Charging
Q3 The hands suddenly start moving at high speed.
This is due to the reason (or one of the reasons) below, and does not indicate malfunction. Simply wait until normal hand movement resumes. The watch is recovering from a power
saving state. l Power Saving A time calibration signal is being received and the time setting is being adjusted. l Time Correction Using a Time Signal Watch is connected with a phone to correct its time setting. l Auto Time Correction
Q4 Hands are stopped and buttons do not work.
The watch is in the charge recovery mode. Wait until the recovery process is complete (for about 15 minutes). The watch will recover more quickly if you place it in a brightly lit location.
Q5 Why is the current time indicated by the watch is off by a certain amount of time (nine hours, three hours and 15 minutes, etc.)?
The city setting is not correct. Select the correct setting. l Setting a Home City
Q6 The current time indicated by the watch is off by one hour or 30 minutes.
The summer time setting is not correct. Select the correct setting. l Configuring the Summer Time Setting

Q7 The hand and/or day indicator are not aligned correctly.
Strong magnetism or impact can cause the hands and/or the indicator to go out of alignment. Correct hand and/or day indicator alignment. l Adjusting Hand and Day Indicator
Alignment Check the information below to find out how
to align the hands and/or day indicator manually. l Adjusting Hand and Day Indicator
Alignment
Crown Operations
Q1 Nothing happens when I rotate the crown.
If you do not perform any operation for about two minutes after pulling out the crown (approximately 30 minutes in the case of hand and day indicator alignment), crown operations will automatically become disabled. Push the crown back in to its normal position and then pull it out again to re-enable crown operations. l Using the Crown
Other
Q1 I can’t find the information I need here.
Visit the website below. https://world.casio.com/support/

21

References

• Timepieces (Watches) | CASIO
• Support | CASIO

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