Casio Watch MA0910 EA User Manual

MA0910-EA  
Operation Guide 5088  
Power Levels  
Congratulations upon your selection of this CASIO watch.  
B
+
You can get an idea of the watch’s power level by  
observing the movement of the xSecond Hand in the  
Timekeeping Mode.  
If the xSecond Hand is moving normally in one-second  
intervals, power is at Level 1.  
This watch does not have a city code that corresponds to the UTC offset of –3.5  
hours. Because of this, the radio-controlled atomic timekeeping function will not  
display the correct time for Newfoundland, Canada.  
If the xSecond Hand is moving at two-second intervals,  
power is at Level 2, which is quite low. Expose the watch  
to light as soon as possible so it can charge.  
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 this  
product or its malfunction.  
@
5
Moving at two-second  
intervals.  
About This Manual  
Button operations are indicated using the letters A  
through D shown in the illustration.  
B
@ +  
Level Hand Movement  
Function Status  
1
Normal.  
All functions enabled  
Hand Functions  
z Hour Hand  
x Second Hand  
c Minute Hand  
v Upper Left Dial Hand  
b Lower Left Dial Hands  
n Right Dial Hand: Indicates the current mode.  
m Day  
xSecond Hand moving at two-second  
intervals.  
Beeper and time calibration signal  
reception disabled  
2
mDay changes to 1 (home position).  
xSecond Hand stopped.  
zHour Hand and cMinute Hand stopped  
at 12 o’clock.  
3
All functions disabled  
When power drops to Level 3, all functions will be disabled but the watch will  
continue to keep time internally for about one week. If you recharge the battery  
sufficiently during this period, the analog hands will move automatically to the  
correct setting and regular timekeeping will resume. After one week, all settings  
(including timekeeping) will be cleared. Recharging the battery will reset all settings  
to their initial factory defaults.  
>
*
6
5
This User’s Guide uses numbers shown above to identify  
watch hands and indicators.  
Power Recovery Mode  
The watch is designed to go into a power recovery mode that stops hand operation  
temporarily whenever power suddenly drops below a certain level due to overuse  
of the alarm tone over a short period. Note that all operations are disabled while the  
watch is in the power recovery mode.  
The hands will move to the correct positions and the watch will resume normal  
operation after power recovers (in about 15 minutes). Putting the watch in a location  
where it is exposed to light will help power to recover sooner.  
Things to check before using the watch  
1. Hold down C for about two seconds to enter the Timekeeping Mode, and  
then observe the movement of the xSecond Hand.  
Is the xSecond Hand moving smoothly in one-second intervals?  
NO  
YES  
Charging Times  
The watch is charged sufficiently.  
For details about charging, see  
“Charging the Watch”.  
Is the xSecond Hand moving at  
two-second intervals or is it stopped  
completely?  
Level Change *2  
Daily  
Level 3  
Level 2  
Level 1  
Exposure Level (Brightness)  
Operation  
*1  
YES  
NEXT  
Power is low. Charge the watch by placing  
it in a location where it is exposed to light.  
For details, see “Charging the Watch”.  
Go to step 2.  
Outdoor sunlight (50,000 lux)  
Window sunlight (10,000 lux)  
8 minutes  
2 hours  
24 hours  
90 hours  
30 minutes  
6 hours  
8 hours  
92 hours  
Window sunlight on cloudy day  
(5,000 lux)  
48 minutes  
8 hours  
– – –  
– – –  
2. Check the Home City and the daylight saving time (DST) setting.  
Indoor fluorescent lighting (500 lux)  
Use the procedure under “To configure Home City settings” to configure your Home  
City and daylight saving time settings.  
* 1 Approximate exposure each day to generate power for normal daily operation.  
* 2 Approximate exposure to take power up one level.  
The above exposure times all are for reference only. Actual exposure times depend  
on lighting conditions.  
For details about the operating time and daily operating conditions, see the “Power  
Supply” section of the Specifications.  
Important!  
Proper time calibration signal reception and World Time settings depend on correct  
Home City, time, and date settings in the Timekeeping Mode. Make sure you  
configure these settings correctly.  
3. Set the current time.  
Power Saving  
To set the time using a time calibration signal  
See “To get ready for a receive operation”.  
To set the time manually  
Power Saving enters a sleep state automatically whenever the watch is left for a  
certain period in an area where it is dark. The table below shows how watch functions  
are affected by Power Saving.  
See “Configuring Current Time and Date Settings Manually”.  
There actually are two sleep state levels: “second hand sleep” and “function sleep”.  
Elapsed Time in Dark  
Operation  
The watch is now ready for use.  
60 to 70 minutes (second hand  
sleep)  
xSecond Hand only is stopped at 12 o’clock, all other  
For details about the watch’s radio controlled timekeeping feature, see “Radio  
Controlled Atomic Timekeeping”.  
functions are enabled.  
All functions, including analog timekeeping, disabled  
Internal timekeeping maintained.  
6 or 7 days (function sleep)  
The watch will not enter a sleep state between 6:00 AM and 9:59 PM. If the watch  
is already in a sleep state when 6:00 AM arrives, however, it will remain in the sleep  
state.  
Charging the Watch  
The face of the watch is a solar cell that generates power from light. The generated  
power charges a built-in rechargeable battery, which powers watch operations. The  
watch charges whenever it is exposed to light.  
The watch will not enter a sleep state while it is in the Stopwatch Mode.  
To recover from the sleep state  
Move the watch to a well-lit area or press any button.  
Charging Guide  
Whenever you are not  
wearing the watch, be sure  
to leave it in a location  
where it is exposed to light.  
Best charging  
performance is achieved  
by exposing the watch to  
light that is as strong as  
possible.  
When wearing the watch,  
makes sure that its face is  
not blocked from light by the  
sleeve of your clothing.  
The watch may enter a  
sleep state if its face is  
blocked by your sleeve  
even only partially.  
Radio Controlled Atomic Timekeeping  
This watch receives a time calibration signal and updates its time setting accordingly.  
However, when using the watch outside of areas covered by time calibration signals,  
you will have to adjust the settings manually as required. See “Configuring Current  
Time and Date Settings Manually” for more information.  
This section explains how the watch updates its time settings when the city code  
selected as the Home City is in Japan, North America, Europe, or China, and is one  
that supports time calibration signal reception.  
Warning!  
If your Home City Code setting  
is this:  
The watch can receive the signal from the  
transmitter located here:  
Leaving the watch in bright light for charging can cause it to become quite hot.  
Take care when handling the watch to avoid burn injury. The watch can become  
particularly hot when exposed to the following conditions for long periods.  
On the dashboard of a car parked in direct sunlight  
Too close to an incandescent lamp  
Under direct sunlight  
LON, PAR, ATH  
Anthorn (England), Mainflingen (Germany)  
Shangqiu City (China)  
HKG  
TYO  
Fukushima (Japan), Fukuoka/Saga (Japan)  
Fort Collins, Colorado (United States)  
HNL, ANC, LAX, DEN, CHI, NYC  
Important!  
Keep the watch in an area normally exposed to bright light when storing it for long  
periods. This helps to ensure that power does not run down.  
Important!  
The areas covered by HNL and ANC are quite far from the calibration signal  
transmitters, so certain conditions may cause reception problems.  
When HNL or HKG is selected as the Home City, only the time and date are  
adjusted according to the time calibration signal. You need to switch manually  
between standard time and daylight saving time (DST) if required. See “To toggle  
the Home City time between standard time and daylight saving time” for information  
about how to do this.  
Storing the watch for long periods in an area where there is no light or wearing it in  
such a way that it is blocked from exposure to light can cause power to run down.  
Make sure that the watch is exposed to bright light whenever possible.  
1
 
Operation Guide 5088  
To select a mode  
Configuring Current Time and Date Settings Manually  
You can configure current time and date settings manually when the watch is unable  
to receive a time calibration signal.  
Press C to cycle between the modes as shown below. The nRight Dial Hand  
indicates the currently selected mode.  
Timekeeping Mode  
C
Stopwatch Mode  
To change the current time setting manually  
1. In the Timekeeping Mode, keep A depressed (for about  
five seconds) as the xSecond Hand goes through the  
following sequence.  
Moves to YES (or Y for some models) or NO (N)  
to indicate the last signal reception result, then to  
READY (R), and then to the city code of the currently  
selected Home City.  
The hand indicates  
the day of the week  
(SU, MO, TU, WE, TH,  
FR, SA).  
The hand points to 0.  
At this time, the nRight Dial Hand will indicate the  
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Alarm Mode  
World Time Mode  
6
Home City’s current daylight saving time setting (STD  
or DST).  
The hand points to AL.  
The hand points to  
STD or DST.  
2. Change the Home City and daylight saving time (DST)  
settings, if you want.  
B
@ +  
For details about these settings, see steps 2 and 3  
under “To configure Home City settings”.  
In the following steps, each press of C cycles  
between settings as shown below.  
Timekeeping  
Use the Timekeeping Mode to view the current time and date. To enter the  
Timekeeping Mode from any other mode, hold down C for about two seconds.  
Year  
(tens)  
Year  
(ones)  
Home city/DST  
Hour/Minute  
B
@ +  
Hand Functions  
z Hour Hand  
Day  
Month  
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6
x Second Hand  
c Minute Hand  
v Upper Left Dial Hand: Indicates the current hour in  
the Home City time in 24-hour  
format.  
b Lower Left Dial Hands:  
Indicate the current time in the World Time City in  
24-hour format.  
3. Press C.  
The watch will beep, and the xSecond Hand and nRight Dial Hand will move  
to their 12 o’clock positions. This is the time setting mode.  
4. Use D (+) and B (–) to change the time (hour and minute) setting.  
Each press of either button will move the hands (zHour Hand and cMinute  
Hand) one minute.  
Holding down D or B will start high-speed zHour Hand and cMinute Hand  
movement in the applicable direction. To stop high-speed hand movement,  
press any button.  
The vUpper Left Dial Hand and zHour Hand move in sync with each other.  
When setting the time, make sure that the vUpper Left Dial Hand indicates the  
proper a.m./p.m. hour.  
>
*
6
5
n Right Dial Hand: Indicates the day of the week.  
m Day  
If you want to change the date setting at this time, press C and perform the  
procedure starting from step 3 under “To change the current date setting  
manually”.  
Configuring Home City Settings  
There are two Home City settings: actually selecting the Home City and selecting  
either standard time or daylight saving time (DST).  
5. After the time setting is the way you want, press A to return to the Timekeeping  
Mode.  
This will cause the xSecond Hand to move automatically to 12 o’clock and  
resume movement from there.  
To configure Home City settings  
Note  
This watch does not have a city code that corresponds  
to Newfoundland.  
1. In the Timekeeping Mode, keep A depressed (for about  
five seconds) as the xSecond Hand goes through the  
following sequence.  
To change the current date setting manually  
1. In the Timekeeping Mode, keep A depressed (for  
about five seconds) as the xSecond Hand goes  
through the following sequence.  
Moves to YES (or Y for some models) or NO (N)  
to indicate the last signal reception result, then  
to READY (R), and then to the city code of the  
currently selected Home City.  
00 10  
@
20  
30  
40  
Moves to YES (or Y for some models) or NO (N)  
to indicate the last signal reception result, then to  
@
READY (R), and then to the city code of the currently  
selected Home City.  
90  
80  
This indicates the city code setting mode.  
2. Press C twice.  
The watch will beep and change to the year  
setting mode.  
B
+
The watch will exit the setting mode automatically if  
you do not perform any operation for about two or  
three minutes.  
The year can be set in the range of 2000 to  
2099.  
For details about city codes, see the “City Code  
70 60 50  
Table”.  
Setting the year (tens digit)  
3. Use D to change the tens digit of the year setting.  
Each press of D will move the xSecond Hand  
and change the tens digit of the year setting.  
2. To change the Home City setting, press D to move the  
xSecond Hand clockwise.  
Keep pressing D until the xSecond Hand is pointing  
at the city code you want to select as your Home City.  
Each time you select a city code, the zHour Hand,  
cMinute Hand, vUpper Left Dial Hand and mDay  
move to the current time and date for that city code.  
Do not perform the next operation until these hands  
stop moving.  
0
1
4. After the tens digit of the year setting is the way  
you want, press C.  
The watch will beep and change to the ones  
digit of the year setting mode.  
@
>
@
6
5
2
3
4
5. Use D to move the xSecond Hand to the ones  
digit of the year setting you want.  
Each press of D will move the xSecond Hand  
and change the ones digit of the year setting.  
9
8
3. Press B to toggle the time for the currently selected city code between STD  
(standard time)/DST (daylight saving time).  
In the city code setting mode, the nRight Dial Hand indicates the current  
daylight saving time setting as STD (standard time) or DST (daylight saving  
time).  
Note that you cannot switch between STD (standard time)/DST (daylight saving  
time) while UTC is selected as your Home City.  
6. After the year setting is the way you want, press  
C.  
The watch will beep and change to the month  
setting mode.  
7
6
5
Setting the year (ones digit)  
4. After all the settings are the way you want, press A to return to the Timekeeping  
Mode.  
Dec  
7. Use D to move the xSecond Hand to the  
Nov  
Jan  
month setting you want.  
To toggle the Home City time between standard time and daylight saving time  
1. Perform the step 1 under “To configure Home City settings”.  
Each time you select a city code, the zHour Hand, cMinute Hand, and  
vUpper Left Dial Hand move to the current time for that city code. Do not  
perform the next operation until these hands stop moving.  
8. After the month setting is the way you want,  
press C.  
The watch will beep and change to the day  
setting mode.  
Oct  
Feb  
Sep  
Aug  
Mar  
2. Press B to toggle the time for the city code of the currently selected Home City  
between STD (standard time)/DST (daylight saving time).  
In the city code setting mode, the vRight Dial Hand indicates the current  
daylight saving time setting as STD (standard time) or DST (daylight saving  
time).  
Note that you cannot switch between STD (standard time)/DST (daylight saving  
time) while UTC is selected as your Home City.  
Apr  
@
Jul  
May  
Jun  
Setting the month  
3. After the setting is the way you want, press A to return to the Timekeeping Mode.  
Note  
After you specify a city code, the watch will use UTC* offsets in the World Time  
Mode to calculate the current time for other time zones based on the current time  
in your Home City.  
Selecting some city codes makes it possible for the watch to receive the time  
calibration signal for the corresponding area automatically.  
* Coordinated Universal Time, the world-wide scientific standard of timekeeping. The  
reference point for UTC is Greenwich, England.  
3
 
Operation Guide 5088  
To specify standard time or daylight saving time (DST) for a city  
@
9. Use D (+) and B (–) to change the mDay setting.  
1. In the World Time Mode, use D to select the city code  
whose setting you want to change.  
Wait until the bLower Left Dial Hands complete their  
move to the time in the currently selected World Time  
City. You will not be able to perform step 2 of this  
procedure until the hands stop moving.  
If you want to change the time setting at this time,  
press C and then perform the procedure starting  
from step 3 under “To change the current time setting  
manually”.  
10. After the settings are the way you want, press A to  
return to the Timekeeping Mode.  
2. Hold down A for about two seconds until the watch  
beeps. This will cause the nRight Dial Hand to toggle  
between DST (daylight saving time) and STD (standard  
time).  
Note that you cannot switch between STD (standard  
time)/DST (daylight saving time) while UTC is  
selected as the World Time City.  
This will cause the xSecond Hand to move  
automatically to 12 o’clock and resume movement  
from there.  
The day of the week indicated by the nRight Dial  
Hand changes automatically in accordance with the  
date (year, month, and day).  
*
6
5
6
Hold down  
A for two  
seconds  
Note  
Note that the STD (standard time)/DST (daylight  
saving time) setting affects only the currently  
selected city code. Other city codes are not affected.  
The watch’s built-in full automatic calendar makes allowances for different month  
lengths and leap years. Once you set the date, there should be no reason to  
change it except after you have the watch’s rechargeable battery replaced or after  
power drops to Level 3.  
Swapping your Home City and World Time City  
You can use the procedure below to swap your Home City and World Time City. This  
capability can come in handy when you frequently travel between two locations in  
different time zones.  
Using the Stopwatch  
The stopwatch measures elapsed time and split times.  
The following example shows what happens when the  
Home City and World Time City are swapped while the  
Home City originally is TYO (Tokyo) and the World Time  
City is NYC (New York).  
@
Hand Functions  
@
x Second Hand: Indicates the stopwatch 1/10-second  
count.  
Home City  
World Time City  
b Lower Left Dial Hands: Indicate the stopwatch minutes  
Tokyo  
New York  
9:08 a.m.  
(Daylight saving time)  
and seconds.  
Before  
swapping  
10:08 p.m.  
n Right Dial Hand: Indicates the stopwatch 1/100-second  
(Standard time)  
count.  
New York  
9:08 a.m.  
(Daylight saving time)  
Tokyo  
After  
swapping  
10:08 p.m.  
To perform elapsed time measurement  
(Standard time)  
1. Use C to move the nRight Dial Hand to 0.  
*
6
2. Now you can perform either of following stopwatch  
operations.  
To swap your Home City and World Time City  
1. In the World Time Mode, use D to select the World  
Time City you want.  
To perform an elapsed time operation  
In this example, you would move the xSecond Hand  
to NYC in order to select New York as the World  
Time City.  
B
B
B
B
D
Start  
Stop  
(Restart)  
(Stop)  
Reset  
Wait until the bLower Left Dial Hands complete their  
move to the time in the currently selected World Time  
City. You will not be able to perform step 2 of this  
procedure until the hands stop moving.  
To pause at a split time  
B
B
D
D
Normal stopwatch hand movement will  
resume automatically after five seconds.  
*
@
Start  
Split  
Stop  
Reset  
2. Hold down B for about three seconds until the watch  
beeps.  
Note  
This will make the World Time City (NYC in this example) your new Home City.  
At the same time, it will change the Home City you had selected prior to step 2  
(TYO in this example), to your World Time City.  
After swapping the Home City and World Time City, the watch will stay in the  
World Time Mode. The xSecond Hand will point to your new World Time City  
(TYO in this example).  
The Stopwatch Mode can indicate elapsed time up to 23 minutes, 59.99 seconds.  
D button operation (split, reset) is disabled while hands are moving at high speed  
following a reset operation and when transitioning from a split time back to normal  
elapsed timekeeping.  
Once started, stopwatch timing continues until you press B to stop it, even if you  
exit the Stopwatch Mode to another mode and even if timing reaches the stopwatch  
limit defined above.  
The xSecond Hand indicates the 1/10-second count for the first 30 seconds of a  
stopwatch elapsed time operation. After that, the hand stops at 12 o’clock.  
1/10-second timing continues internally after the first 30 seconds, and the  
xSecond Hand will jump to the current value whenever B (Stop) or D (Split) is  
pressed.  
The bLower Left Dial Hands will indicate the current time in your new World  
Time City.  
Note  
If your current World Time City supports time calibration signal reception, making it  
your Home City enables calibration signal reception for that city.  
Though the nRight Dial Hand is stopped while an elapsed time measurement  
operation is in progress, the watch keeps track of the 1/100-second count  
internally. The nRight Dial Hand will jump to the current 1/100-second reading  
whenever you stop the stopwatch or perform a split time operation.  
Using the Alarm  
When the alarm is turned on, an alarm will sound for about 10 seconds each day  
when the time in the Timekeeping Mode reaches the preset alarm time. This is true  
even if the watch is not in the Timekeeping Mode.  
Checking the Current Time in a Different Time Zone  
You can use the World Time Mode to view the current time in one of 29 time zones  
around the globe. The city that is currently selected in the World Time Mode is called  
the “World Time City”.  
Hand Functions  
x Second Hand:  
Indicates the current alarm ON/OFF setting.  
b Lower Left Dial Hands:  
Indicate the current alarm time setting in 24-hour  
format.  
@
Hand Functions  
@
x Second Hand:  
Indicates the currently selected World Time City.  
n Right Dial Hand: Points to AL.  
b Lower Left Dial Hands:  
Indicate the current time in the selected World Time  
City in 24-hour format.  
n Right Dial Hand:  
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6
Indicates the current STD (standard time) or DST  
(daylight saving time) setting of the currently selected  
time zone.  
To change the alarm time setting  
1. Use C to move the nRight Dial Hand to AL.  
*
6
2. Use D (+) and B (–) to change the alarm time setting.  
Each press of either button will move the bLower Left Dial Hands one minute.  
Holding down D or B will start high-speed hand movement in the applicable  
direction. To stop high-speed hand movement, press any button.  
The alarm always works based on the time kept in the Timekeeping Mode.  
The watch will return to the Timekeeping Mode automatically if you do not  
perform any operation in the Alarm Mode for about two or three minutes.  
To view the time in another time zone  
1. Use C to move the nRight Dial Hand to STD or DST.  
The xSecond Hand will move to the city code of the currently selected World  
Time City.  
2. Use D to move the xSecond Hand to the city code you want to select as the  
World Time City.  
The bLower Left Dial Hands will move to the current time in the time zone of  
the current city code. At this time, the zHour Hand and cMinute Hand will  
continue to indicate the current time in the Home City.  
To turn the alarm on or off  
In the Alarm Mode, press A to toggle the alarm on and off. The xSecond Hand will  
indicate the current ON/OFF setting.  
For full information on city codes, see the “City Code Table”.  
If you think that the time indicated for the selected time zone is not correct, it  
probably means that there is something wrong with your Home City settings.  
Use the procedure under “To configure Home City settings” to correct the Home  
City settings.  
To stop the alarm  
Press any button.  
4
 
Operation Guide 5088  
Auto Correction of Hand Home Positions  
Strong magnetism or impact can cause the hands and/or day setting to be off, even  
if the watch is able to perform the signal receive operation. Auto correction of hand  
home positions correct the hand position automatically.  
Auto correction is performed in the Timekeeping Mode only.  
Auto correction corrects the positions of the zHour Hand, cMinute Hand, and  
xSecond Hand. For the dial hands and day, you must perform the manual  
adjustment procedure under “Adjusting the Home Positions Manually”.  
Each hour, the watch performs automatic correction of the hand positions from –55  
minutes to +5 minutes.  
You also can trigger auto correction of hand home positions manually, if you want.  
See “To trigger auto correction of hand home positions” for more information.  
Auto correction of hand home positions can take up to three and a half minutes to  
complete.  
5. After confirming that the bLower Left Dial Hands are in  
the correct home positions, press C. This will advance  
to nRight Dial Hand home position adjustment.  
The nRight Dial Hand is in the correct home position  
if it is pointing at 12 o’clock. If it isn’t, use D (+) and  
B (–) to move it to 12 o’clock.  
6. After confirming that the nRight Dial Hand is in the  
correct home position, press C. This will advance to  
day home position adjustment.  
The mDay is in the correct home position if it  
shows 1. If it doesn’t, use D (+) and B (–) to change  
the day to 1.  
*
6
5
7. Press A to return to the Timekeeping Mode.  
The mDay moves to the current day, and then the zHour Hand and the  
cMinute Hand move to the current time. Wait until everything stops moving.  
If hand positions are off by one hour or more, correct them using the procedure  
under “To trigger auto correction of hand home positions” or “Adjusting the Home  
Positions Manually”.  
To trigger auto correction of hand home positions  
Troubleshooting  
Perform the following procedure when the time setting  
@
Hand Movement and Position  
is off.  
I lost track of what mode the watch is in.  
Refer to “To select a mode”. To return directly to the Timekeeping Mode from any  
other mode, hold down C for about two seconds.  
In the Timekeeping Mode, hold down D for about six  
seconds until the xSecond Hand completes one full  
revolution.  
Though the xSecond Hand will stop momentarily about  
three seconds after you hold down D, do not release  
the button yet. Wait until the xSecond Hand completes  
a full revolution before you release D.  
To interrupt an ongoing correction operation and return  
to the Timekeeping Mode, press D again.  
The xSecond Hand is moving at two-second intervals.  
All the watch’s hands are stopped at 12 o’clock and none of the buttons work.  
Power may be low. Expose the watch to light until the xSecond Hand starts moving  
normally, at one-second intervals.  
The hands of the watch suddenly start moving at high speed, even when I do  
not perform any operation.  
If you release D when the xSecond Hand stops the first time (after about three  
seconds) in the above operation, the watch will enter the home position adjustment  
mode, which is described under “Adjusting the Home Positions Manually”. If this  
happens, press A to return to the Timekeeping Mode and then perform the above  
operation again.  
Manually triggered auto correction of hand home positions performs the following  
two steps.  
This could be due to any one of the following causes. In all cases, the hand movement  
does not indicate malfunction, and should stop shortly.  
The watch is recovering from a sleep state.  
The time setting is being adjusted following a successful auto time calibration  
signal receive operation.  
The watch is returning to the Timekeeping Mode automatically from the Alarm  
Mode.  
1. The hands will move automatically in order to determine the home positions of the  
watch.  
Hands suddenly stop moving. Button operation also is disabled.  
The watch may be in the power recovery mode. Do not perform any operation until the  
hands return to their normal positions (in about 15 minutes). The hands should return  
to their correct positions when normal operation returns. To help power recover, leave  
the watch in a location where it is exposed to light.  
2. After the hand home positions are determined, the watch will return to normal  
timekeeping automatically. This completes the correction operation.  
The current time setting is off by hours.  
Your Home City setting may be wrong. Check your Home City setting and correct it,  
if necessary.  
Adjusting the Home Positions Manually  
Strong magnetism or impact can cause the hands and/or date of the watch to be  
off, even if the watch is able to perform the signal receive operation. If this happens,  
perform the applicable home position adjustment procedures in this section.  
Hand home position adjustment is not required if the time and day settings are  
correct.  
You also can use auto correction of the hand home positions to correct the home  
positions of the zHour Hand, cMinute Hand, and xSecond Hand.  
The current time setting is off by one hour.  
If you are using the watch in an area where time calibration signal reception is  
possible, see “To configure Home City settings”.  
If you are using in the watch in an area where time calibration signal reception is  
not possible, you may need to change your Home City’s STD (standard time)/DST  
(daylight saving time) setting manually. Use the procedure under “To toggle the Home  
City time between standard time and daylight saving time” to change the STD/DST  
setting.  
Note  
Any time after you enter the home position adjustment mode in step 1 of the following  
procedure, you can return to the Timekeeping Mode by pressing A. The watch also  
will return to the Timekeeping Mode automatically if you do not perform any operation  
for about two or three minutes in home position adjustment mode. In either case, any  
adjustments you made before the watch returned to the Timekeeping Mode will be  
applied.  
The hands and/or day indications are off.  
This could indicate that the watch has been exposed to magnetism or strong impact,  
which has caused problems with proper hand and day alignment. Adjust the watch’s  
hand and day home position alignment.  
World Time Mode  
To adjust the home positions  
1. Hold down C for about two seconds until the watch beeps twice and enters the  
Timekeeping Mode.  
The World Time indicated by the bLower Left Dial Hands in the World Time  
Mode is one hour off from the actual time in the selected time zone.  
The STD (standard time)/DST (daylight saving time) setting of the selected World  
Time City may be wrong. Select the correct STD (standard time)/DST (daylight saving  
time) setting.  
2. Hold down D for about three seconds until the watch beeps.  
@
The watch is now in the home position adjustment  
mode.  
The World Time indicated by the bLower Left Dial Hands in the World Time  
Mode is off.  
Your Home City setting may be wrong. Check your Home City setting and correct it,  
if necessary.  
The watch will exit the adjustment mode automatically  
if you do not perform any operation for about two or  
three minutes.  
First is xSecond Hand home position adjustment.  
If the xSecond Hand moves to 12 o’clock, it is in the  
correct home position. If it doesn’t, use D to move it  
to 12 o’clock.  
Each press of C in the home position adjustment  
mode will cycle through the adjustment settings as  
shown below.  
Charging  
The watch does not resume operation after I expose it to light.  
This can happen after the power level drops to Level 3. Continue exposing the watch  
to light until the xSecond Hand starts moving normally (at one-second intervals).  
The xSecond Hand starts to move at one-second intervals, but then suddenly  
returns to moving at two-second intervals.  
The watch probably is not sufficiently charged yet. Continue keeping it exposed to  
xSecond  
mDay  
zHour/ cMinute/ v24-hour  
bLower Left Dial Hands  
light.  
nRight Dial Hand  
Time Calibration Signal  
The information in this section applies only when LON, PAR, ATH, HNL, ANC, LAX,  
DEN, CHI, NYC, HKG, or TYO is selected at the Home City. You need to adjust the  
current time manually when any other city is selected as the Home City.  
3. After confirming that the xSecond Hand is at the proper home position, press C.  
This will switch to zHour Hand and cMinute Hand home position adjustment.  
The zHour Hand and cMinute Hand are at their proper home positions if  
they both move to 12 o’clock. The vUpper Left Dial Hand also will move along  
with zHour Hand movement, and cannot be adjusted individually. If the hands  
are not positioned correctly, use D (+) and B (–) to move them to their proper  
home positions.  
The xSecond Hand indicates NO (N) when I check the result of the latest  
receive operation.  
Possible Cause  
Remedy  
You are wearing or moving the watch, or  
performing a button operation during the  
signal receive operation.  
The watch is in an area with poor reception  
conditions.  
4. After confirming that the zHour Hand and cMinute  
Keep the watch in an area where reception  
conditions are good while the signal receive  
operation is being performed.  
B
+
Hand are in their correct home positions, press C. This  
will switch to bLower Left Dial Hands home positions  
adjustment.  
You are in an area where signal reception is  
not possible for some reason.  
The bLower Left Dial Hands are at their proper home  
positions if they both move to 12 o’clock. If the hands  
are not positioned correctly, use D (+) and B (–) to  
See “Approximate Reception Ranges”.  
Check the website of the organization that  
maintains the time calibration signal in your  
area for information about its down times.  
The calibration signal is not being transmitted  
for some reason.  
move them to 12 o’clock.  
Try again later.  
>
*
5
 
Operation Guide 5088  
The current time setting changes after I set it manually.  
City Code Table  
You may have the watch configured for Auto Receive of the time calibration signal,  
which will cause the time to be adjusted automatically according to your currently  
selected Home City. If this results in the wrong time setting, check your Home City  
setting and correct it, if necessary.  
City  
City  
UTC Offset/  
City  
UTC Offset/  
City  
Code  
GMT Differential  
Code  
GMT Differential  
PPG  
HNL  
ANC  
LAX  
DEN  
CHI  
Pago Pago  
Honolulu  
Anchorage  
Los Angeles  
Denver  
–11  
–10  
–9  
–8  
–7  
–6  
–5  
–4  
–3  
–2  
–1  
JED  
THR  
DXB  
KBL  
KHI  
DEL  
DAC  
RGN  
BKK  
HKG  
TYO  
ADL  
SYD  
NOU  
WLG  
Jeddah  
Tehran  
Dubai  
Kabul  
Karachi  
Delhi  
+3  
+3.5  
+4  
+4.5  
+5  
+5.5  
+6  
+6.5  
+7  
+8  
+9  
+9.5  
+10  
+11  
+12  
The current time setting is off by one hour.  
Possible Cause  
Remedy  
Perform the operation under “To get ready  
for a receive operation”. The time setting will  
be adjusted automatically as soon as signal  
reception is successful.  
Chicago  
NYC  
SCL  
RIO  
New York  
Santiago  
Rio De Janeiro  
Dhaka  
Signal reception on a day for switching  
between STD (standard time)/DST (daylight  
saving time) may have failed for some  
reason.  
Yangon  
Bangkok  
Hong Kong  
Tokyo  
Adelaide  
Sydney  
Noumea  
Wellington  
If you are unable to receive the time  
calibration signal, change the STD (standard  
time)/DST (daylight saving time) setting  
manually.  
FEN Fernando de Noronha  
RAI  
UTC  
LON  
PAR  
ATH  
Praia  
0
London  
Paris  
Athens  
+1  
+2  
Auto Receive is not performed or I cannot perform Manual Receive.  
Possible Cause  
Remedy  
Based on data as of June 2009.  
The rules governing global times (UTC offset and GMT differential) and summer  
time are determined by each individual country.  
Auto Receive is not performed while the  
watch is in the Stopwatch Mode. Hold  
down C for about two seconds to enter the  
Timekeeping Mode.  
The watch is in the Stopwatch Mode.  
Check your Home City setting and correct it,  
if necessary.  
Your Home City setting is wrong.  
There is not enough power for signal  
reception.  
Expose the watch to light to charge it.  
Signal reception is being performed successfully, but the time and/or day is  
wrong.  
Possible Cause  
Remedy  
Check your Home City setting and correct it,  
if necessary.  
Your Home City setting is wrong.  
The watch may have been exposed to  
magnetism or strong impact, which has  
Adjust the watch’s hand and day home  
caused problems with proper hand and day positions.  
alignment.  
Specifications  
Accuracy at normal temperature: 15 seconds a month (with no signal calibration)  
Timekeeping: Hour, minutes (hand moves every 10 seconds), seconds, 24-hour,  
day, day of the week  
Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099  
Other: Home City code (can be assigned one of 29 city codes and Coordinated  
Universal Time); Daylight Saving Time (summer time) / Standard Time  
Time Calibration Signal Reception: Auto receive up to six times a day (5 times a  
day for the Chinese calibration signal; Remaining auto receives  
cancelled as soon as one is successful); Manual receive  
Receivable Time Calibration Signals:  
Mainflingen, Germany (Call Sign: DCF77, Frequency: 77.5 kHz);  
Anthorn, England (Call Sign: MSF, Frequency: 60.0 kHz); Fukushima,  
Japan (Call Sign: JJY, Frequency: 40.0 kHz); Fukuoka/Saga, Japan  
(Call Sign: JJY, Frequency: 60.0 kHz); Fort Collins, Colorado, the  
United States (Call Sign: WWVB, Frequency: 60.0 kHz); Shangqiu City,  
Henan Province, China (Call Sign: BPC, Frequency: 68.5 kHz)  
Stopwatch: Measuring capacity: 23'59.99"  
Measuring unit: 1/100 second  
Measuring mode: Elapsed time, split time  
World Time: 29 cities (29 time zones) and Coordinated Universal Time  
Other: Standard Time/Daylight Saving Time (summer time); Home City/World Time  
City swapping  
Alarm: Daily alarm  
Other: Power Saving  
Power Supply: Solar cell and one rechargeable battery  
Approximate battery operating time: 5 months (no exposure to light after a  
full charge; 10 seconds alarm beeper operation and one signal reception of  
approximately 4 minutes per day)  
6
 

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