Module No. 5671
Troubleshooting
Signal Reception (Time Calibration Signal)
Q1The 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.
Is the watch in the World Time Mode or in the Stopwatch Mode with the stopwatch reset to all zeros?
The watch cannot receive time signals while auto adjustment is disabled or while there is an elapsed time measurement operation being performed in the Stopwatch Mode. Return to the World Time Mode or enter the Stopwatch Mode and reset the stopwatch to all zeros.
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.
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.
Q2The 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.
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.
Q3Signal 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?
Is the hand and/or day indicator alignment correct?
Adjust hand and/or day indicator alignment.
After checking the above, the time and/or day settings is still wrong.
Adjust time and day settings manually.
I can’t pair the watch with a phone.
Q1I’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.
Did you install CASIO WATCHES on your phone?
CASIO WATCHES needs to be installed on your phone in order to connect with the watch.
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” 
“Bluetooth” On
“Settings” “Privacy” “Bluetooth Sharing” “CASIO WATCHES” On
Android Users
Enable Bluetooth.
Other than the above.
Some phones need to have BT Smart disabled to use CASIO WATCHES. For details about setting procedures, see your phone documentation.
On the Home Screen, tap: “Menu” “Settings” “Bluetooth” “Menu” “BT Smart settings” “Disable”.
I can’t reconnect the watch and phone.
Q1The watch will not re-connect with the phone after they are disconnected.
Is CASIO WATCHES running?
The watch cannot re-connect with the phone unless CASIO WATCHES is running on the phone. On the phone’s Home Screen, tap the “CASIO WATCHES” icon. Then on the watch, hold down (B) until the second hand points to [C] twice.
The second hand will point to [C] once after about 0.5 seconds, and then a second time after about 2.5 seconds.
Have you tried turning your phone off and then back on again?
Turn the phone off and then back on, and then tap the “CASIO WATCHES” icon. Next, on the watch, hold down (B) until the second hand points to [C] twice.
The second hand will point to [C] once after about 0.5 seconds, and then a second time after about 2.5 seconds.
Q2I can’t connect while my phone is in the Airplane Mode.
Connection with the watch is not possible while the phone is in the Airplane Mode. After exiting the phone’s Airplane Mode, go to the phone’s Home Screen and tap the “CASIO WATCHES” icon. Then on the watch, hold down (B) until the second hand points to [C] twice.
The second hand will point to [C] once after about 0.5 seconds, and then a second time after about 2.5 seconds.
Q3I can’t establish a connection after disabling the watch’s auto time adjustment feature.
On the watch, enable auto time adjustment, and then hold down (B) until the second hand points to [C] twice.
The second hand will point to [C] once after about 0.5 seconds, and then a second time after about 2.5 seconds.
Q4I changed the phone’s Bluetooth from enabled to disabled, and now I can’t connect anymore.
On the phone, turn Bluetooth off and then back on, and then tap the “CASIO WATCHES” icon on the Home Screen. Next, on the watch, hold down (B) for until the second hand points to [C] twice.
The second hand will point to [C] once after about 0.5 seconds, and then a second time after about 2.5 seconds.
Q5I can’t connect after turning off the phone.
Turn on the phone and then tap the “CASIO WATCHES” icon. Next, on the watch, hold down (B) until the second hand points to [C] twice.
The second hand will point to [C] once after about 0.5 seconds, and then a second time after about 2.5 seconds.
Phone-Watch Connection
Q1I can’t establish a connection between the phone and watch.
Have you tried turning your phone off and then back on again?
Turn the phone off and then back on, and then tap the “CASIO WATCHES” icon. Next, on the watch, hold down (B) until the second hand points to [C] twice.
The second hand will point to [C] once after about 0.5 seconds, and then a second time after about 2.5 seconds.
Has the watch been re-paired with the phone?
After deleting pairing information from CASIO WATCHES, re-pair them.
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.
Changing to a Different Phone Model
Q1Connecting the current watch to another phone.
Pair the watch with the phone.
Auto Time Adjustment by Bluetooth Connection (Time Adjustment)
Q1When does the watch adjust its time?
The watch will connect with the phone and perform auto time adjustment 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 adjustment is complete. Also, time signal auto receive will be performed if there has been no auto time adjustment based on connection between the watch and phone for more than one day.
Q2Auto time adjustment is performed, but the time setting is not correct.
Is auto time adjustment not being performed according to its normal schedule?
Note that auto time adjustment is not performed for 24 hours after swapping of the Home Time and World Time, or after the time setting is adjusted manually on the watch. Auto time adjustment will resume 24 hours after either of the above operations is performed.
Is auto time adjustment enabled?
Auto time adjustment will not be performed at the scheduled times unless it is enabled. Enable auto time adjustment.
Q3Time 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 adjust the time setting.
Q4Time 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 adjustment based on connection between the watch and phone for more than one day.
Hand Movement and Indications
Q1I don’t know what mode the watch is in.
You can determine the current mode by checking the mode hand position. To navigate between modes, pull out the crown and press (A).
Q2The second hand is jumping at two-second intervals.
Battery power is low. Keep the watch exposed to light until it recharges sufficiently.
Q3All hands are stopped and buttons do not work.
The battery is dead. Keep the watch exposed to light until it recharges sufficiently.
Q4The hands suddenly start moving at high speed.
This is due to 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.
A time calibration signal is being received and the time setting is being adjusted.
Watch is connected with a phone to adjust its time setting.
Q5Hands 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.
Q6Why 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.
Q7The 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.
Q8The 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. Adjust hand and/or day indicator alignment.
Check the information below to find out how to align the hands and/or day indicator manually.
Crown Operations
Q1Nothing 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.
Other
Q1I can’t find the information I need here.
Visit the website below.