Casio Watch AWG101 1A User Manual

MO0705-EA  
Operation Guide 4765  
Getting Acquainted  
Congratulations upon your selection of this CASIO watch. To get the most out of your purchase,  
be sure to read this manual carefully.  
The actual level at which some functions are disabled depends on the watch  
model.  
Frequent display illumination can run down the battery quickly and require  
charging. The following guidelines give an idea of the charging time required to  
recover from a single illumination operation.  
Approximately 5 minutes exposure to bright sunlight coming in through a window  
Approximately 50 minutes exposure to indoor fluorescent lighting  
Be sure to read “Power Supply” for important information you need to know  
when exposing the watch to bright light.  
Keep the watch exposed to bright light  
The electricity generated by the solar cell of the watch is  
Bright Light  
stored by a built-in battery. Leaving or using the watch where  
it is not exposed to light causes the battery to run down.  
Make sure the watch is exposed to light as much as possible.  
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Solar cell  
When you are not wearing the watch on your wrist,  
position the face so it is pointed at a source of bright light.  
You should try to keep the watch outside of your sleeve  
as much as possible. Charging is reduced significantly  
if the face is only partially covered.  
If the display of the watch is blank...  
If the display of the watch is blank, it means that the watch’s Power Saving function  
has turned off the display to conserve power.  
See “Power Saving Function” for more information.  
About This Manual  
Depending on the model of your watch, display text  
appears either as dark figures on a light background, or  
light figures on a dark background. All sample displays  
in this manual are shown using dark figures on a light  
background.  
Button operations are indicated using the letters shown  
in the illustration.  
The watch continues to operate, even when it is not exposed to light. Leaving the  
watch in the dark can cause the battery to run down, which will result in some  
watch functions to be disabled. If the battery goes dead, you will have to re-  
configure watch settings after recharging. To ensure normal watch operation, be  
sure to keep it exposed to light as much as possible.  
Battery charges in the light.  
Battery discharges in the dark.  
Most of the display examples in this manual show only  
the digital display, without the analog hands.  
Each section of this manual provides you with the  
information you need to perform operations in each  
mode. Further details and technical information can be  
found in the “Reference” section.  
Bright Light  
Solar cell  
(Converts light to  
electrical power.)  
Electrical  
energy  
All  
functions  
enabled  
LEVEL 1  
LEVEL 2  
LEVEL 3  
LEVEL 4  
LEVEL 1  
LEVEL 2  
Some or all  
functions  
disabled  
LEVEL 3  
LEVEL 4  
Dis-  
charge  
Charge  
Rechargeable battery  
Countdown Timer Mode  
Stopwatch Mode  
General Guide  
Press C to change from mode to mode.  
In any mode (except when a setting screen is on the display), press B to illuminate  
the face of the watch.  
Battery Level Indicator  
World Time Mode  
Timekeeping Mode  
Press C.  
Hand Setting Mode  
Alarm Mode  
Radio-controlled Atomic Timekeeping  
This watch receives a time calibration signal and updates  
its time setting accordingly.  
Supported time calibration signals: Germany  
(Mainflingen), England (Rugby), United States (Fort  
Collins), Japan.  
Important!  
Day  
Normally, your watch should show the correct time as soon as you select your Home  
City code. If it does not, it should adjust automatically after the next auto receive  
operation (in the middle of the night).You can also perform manual receive or you  
can set the time manually.  
Month  
Seconds  
The watch will receive the time calibration signal automatically from the applicable  
transmitter (in the middle of the night) and update its settings accordingly. For  
information about the relationship between city codes and transmitters, see “Home  
City Codes and Transmitters”.  
Under factory default settings, auto receive is turned off for all of the following city  
codes: MOW (Moscow), HKG (Hong Kong), BJS (Beijing), HNL (Honolulu), and  
ANC (Anchorage). For details about turning on auto receive for these city codes, see  
To turn auto receive on and off”.  
You can disable time signal reception, if you want. See “To turn auto receive on and  
off” for more information.  
See the maps under “Reception Ranges” for information about the reception ranges  
of the watch.  
Current Time Setting  
This watch adjusts its time setting automatically in  
accordance with a time calibration signal.You can also  
perform a manual procedure to set the time and date,  
when necessary.  
The first thing you should do after purchasing this watch  
is to specify your Home City (the city where you  
normally will use the watch). For more information, see  
To specify your Home City”.  
When using the watch outside the areas covered by the time signal transmitters, you  
will have to adjust the current time setting manually as required. See “Timekeeping”  
for more information about manual time settings.  
The U.S. time calibration signal can be picked up by the watch while in North  
America. The term “North America” in this manual refers to the area that consists of  
Canada, the continental United States, and Mexico.  
The analog time of this watch is synchronized with the digital time. Because of this,  
the analog time setting is automatically adjusted whenever you change the digital  
setting. See “Analog Timekeeping” for more information.  
If you are in an area that does not use Daylight Saving Time (summertime), turn off  
the DST setting.  
Time Calibration Signal Reception  
There are two different methods you can use to receive the time calibration signal:  
auto receive and manual receive.  
Auto Receive  
With auto receive, the watch receives the time calibration signal automatically up to  
six times a day. When any auto receive is successful, the remaining auto receive  
operations are not performed. For more information, see “About Auto Receive”.  
To specify your Home City  
1. In the Timekeeping Mode, hold down A the city code  
starts to flash. This is the setting screen.  
2. Press D(east) to select the city code you want to use  
as your Home City.  
City code  
Manual Receive  
Manual receive lets you start a time calibration receive operation with the press of a  
button. For more information, see “To perform manual receive”.  
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Time calibration signal reception is supported when  
any one of the city codes shown in the table below is  
selected as your Home City.  
Important!  
When getting ready to receive the time calibration signal, position the watch as  
shown in the nearby illustration, with its 12 o’clock side facing towards a window.  
Make sure there are no metal objects nearby.  
German/U.K. Signal  
Japan Signal  
U.S. Signal  
City City  
City City  
City City  
City City  
City City  
Code Name  
Code Name  
Code Name  
Code Name  
Code Name  
LIS  
Lisbon  
ATH Athens HKG Hong Kong HNL Honolulu  
MOW Moscow BJS Beijing  
TPE Taipei  
YWG Winnipeg  
12 o’clock  
or  
LON London  
MAD Madrid  
PAR Paris  
ANC Anchorage CHI Chicago  
YVR Vancouver  
MIA Miami  
SEL Seoul  
TYO Tokyo  
LAX Los Angeles YTO Toronto  
ROM Rome  
BER Berlin  
STO Stockholm  
YEA Edmonton  
DEN Denver  
NYC New York  
YHZ Halifax  
MEX Mexico City YYT St. Johns  
3. Press A to exit the setting screen.  
Make sure the watch is facing the right way.  
1
 
Operation Guide 4765  
Stopwatch  
The stopwatch lets you measure elapsed time, split times,  
Signal Reception Troubleshooting  
1/100 second  
Seconds  
and two finishes.  
Check the following points whenever you experience problems with signal reception.  
The display range of the stopwatch is 59 minutes, 59.99  
seconds.  
Problem  
Probable Cause  
What you should do  
The stopwatch continues to run, restarting from zero  
after it reaches its limit, until you stop it.  
Exiting the Stopwatch Mode while a split time is frozen  
on the display clears the split time and returns to  
elapsed time measurement.  
The stopwatch measurement operation continues even  
if you exit the Stopwatch Mode.  
Cannot perform  
The watch is not in the Timekeeping Mode. Enter the Timekeeping  
manual receive. Your current Home City is not one of  
the following:  
Mode and try again.  
Select LIS, LON, MAD, PAR,  
ROM, BER, STO, ATH, MOW,  
HKG, BJS,TPE, SEL,TYO,  
HNL, ANC,YVR, LAX,YEA,  
DEN, MEX,YWG, CHI, MIA,  
YTO, NYC,YHZ, or YYT as  
your Home City.  
LIS, LON, MAD, PAR, ROM, BER, STO,  
ATH, MOW, HKG, BJS,TPE, SEL,TYO,  
HNL, ANC,YVR, LAX,YEA, DEN, MEX,  
YWG, CHI, MIA,YTO, NYC,YHZ, or  
YYT  
Minutes  
All of the operations in this section are performed in the  
Stopwatch Mode, which you enter by pressing C.  
Time setting is If the time is one hour off, the DST  
Change the DST setting to  
incorrect  
setting may be incorrect.  
Auto DST.  
To measure times with the stopwatch  
Elapsed Time  
following signal The Home City code setting is not  
Select the correct Home City  
code.  
reception.  
correct for the area where you are  
using the watch.  
For further information, see “Important!” under “Time Calibration Signal Reception”  
and “Radio-controlled Atomic Timekeeping Precautions”.  
D
Re-start  
D  
Stop  
A  
Clear  
D
Start  
D  
Stop  
Split Time  
World Time  
A
A
D  
Stop  
D
Start  
A  
Split  
displayed)  
The World Time Mode digitally displays the current time in  
48 cities (29 time zones) around the world.  
Split release  
Clear  
City code  
(
If the current time shown for a city is wrong, check your  
Home City time settings and make the necessary  
changes.  
The watch will perform a signal reception even if it is in  
the World Time Mode when a calibration time is  
reached. If this happens, the World Time Mode time  
settings will be adjusted in accordance with the  
Timekeeping Mode’s Home City time.  
Two Finishes  
A
D
Stop  
Second runner  
finishes.  
A  
Split release  
Display time of  
second runner.  
D
Start  
A  
Split  
Clear  
First runner  
finishes.  
Display time of  
first runner.  
All of the operations in this section are performed in the  
World Time Mode, which you enter by pressing C.  
Current time in  
selected city  
Alarm  
To view the time in another city  
When the alarm is turned on, the alarm sounds when the  
alarm time is reached.You can also turn on an Hourly  
Time Signal, which will cause the watch to beep twice  
every hour on the hour.  
While in the World Time Mode, press D to scroll through the city codes (time zones)  
to the east.  
For full information on city codes, see the “City Code Table”.  
On/Off status  
2 seconds  
When the alarm is turned on, the alarm screen  
alternates between ALON (alarm on) and the current  
alarm time (hour and minutes). When the alarm is off,  
ALOF (alarm off) remains on the alarm screen.  
All of the operations in this section are performed in the  
Alarm Mode, which you enter by pressing C.  
Pressing D in the Alarm Mode toggles between the  
alarm screen and Hourly Time Signal screen.  
To toggle a city code time between Standard Time and Daylight Saving Time  
1. In the World Time Mode, use D to display the city code  
(time zone) whose Standard Time/Daylight Saving Time  
setting you want to change.  
2. Hold down A to toggle Daylight Saving Time (DST  
indicator displayed) and Standard Time (DST indicator  
not displayed).  
Alarm Screen  
L
Press D.  
L
DST indicator  
Note that you cannot use the World Time Mode to change the DST setting of the  
Home City code you currently have selected in the Timekeeping Mode. See “To  
change the Daylight Saving Time (summer time) setting” for information about  
turning the Home City code DST setting on and off.  
The DST indicator will appear on the display whenever you display a city code for  
which Daylight Saving Time is turned on.  
Hourly Time Signal Screen  
To set the alarm time  
1. In the Alarm Mode, press D to display the alarm  
screen.  
2. Hold down A until the hour setting of the alarm time  
starts to flash, which indicates the setting screen.  
This operation automatically turns on the alarm.  
3. Press C to move the flashing between the hour and  
minute settings.  
Alarm time  
(Hour : Minutes)  
Note that the DST/Standard Time setting affects only the currently displayed city  
code. Other city codes are not affected.  
Countdown Timer  
4. While a setting is flashing, use D (+) and B (–) to  
change it.  
You can set the countdown timer within a range of one to  
60 minutes. An alarm sounds when the countdown  
reaches zero.  
Seconds  
When setting the alarm time using the 12-hour format,  
take care to set the time correctly as a.m. (no  
indicator) or p.m. (P indicator).  
Calibration signal reception (both auto and manual) is  
disabled while a countdown timer operation is in  
progress.  
5. Press A to exit the setting screen.  
All of the operations in this section are performed in the  
Countdown Timer Mode, which you enter by pressing  
C.  
Alarm Operation  
The alarm sounds at the preset time for about 10 seconds, regardless of the mode the  
watch is in.  
To stop the alarm tone after it starts to sound, press any button.  
Alarm and Hourly Time Signal operations are performed in accordance with the  
Timekeeping Mode digital time.  
Minutes  
To set the countdown start time  
1. While the countdown start time is on the display in the Countdown Timer Mode,  
hold down A until the current countdown start time starts to flash, which indicates  
the setting screen.  
To test the alarm  
In the Alarm Mode, hold down D to sound the alarm.  
If the countdown start time is not displayed, use the procedure under “To use the  
To turn the alarm and the Hourly Time Signal on and off  
countdown timer” to display it.  
1. In the Alarm Mode, press D to select the alarm or the  
2. While a setting is flashing, use D (+) and B (–) to change it.  
3. Press A to exit the setting screen.  
On/Off status  
Hourly Time Signal screen.  
2. Press A to toggle the currently selected function on  
(ON displayed) and off (OF displayed).  
The alarm on indicator and the Hourly Time Signal on  
indicator remain on the display in all modes while these  
functions are turned on.  
To use the countdown timer  
Press D while in the Countdown Timer Mode to start the countdown timer.  
When the end of the countdown is reached, the alarm sounds for 10 seconds or until  
you stop it by pressing any button. The countdown time is automatically reset to its  
starting value after the alarm stops.  
Hourly time signal  
on indicator  
Alarm on indicator  
Press D while a countdown operation is in progress to pause it. Press D again to  
resume the countdown.  
To completely stop a countdown operation, first pause it (by pressing D), and then  
press A. This returns the countdown time to its starting value.  
Illumination  
An LED (light-emitting diode) and light guide panel  
illuminate the digital display for easy reading in the dark.  
See “Illumination Precautions” for other important  
information.  
To turn on illumination  
In any mode (except when a setting is on the display),  
press B to illuminate the display.  
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Operation Guide 4765  
Timekeeping  
Use the Timekeeping Mode to set and view the current time and date. This section  
also explains how to manually set the current date and time.  
When setting the time, you can also configure settings for the illumination duration  
and the 12/24-hour format.  
All of the operations in this section are performed in the Timekeeping Mode, which  
you can enter by pressing C.  
To change the Daylight Saving Time (summer time) setting  
1. In the Timekeeping Mode, hold down A until the city code starts to flash, which  
indicates the setting screen.  
2. Press C once and the DST setting screen appears.  
3. Use D to cycle through the DST settings in the sequence shown below.  
Day  
Month  
Seconds  
PM indicator  
Day of week  
Auto DST (AUTO)  
DST off (OFF)  
DST on (ON)  
Press A.  
A
4. When the setting you want is selected, press A to exit the setting screen.  
The DST indicator ( ) appears on the display to indicate that Daylight Saving Time  
is turned on.  
Analog Timekeeping  
The analog time of this watch is synchronized with the digital time. The analog time  
setting is adjusted automatically whenever you change the digital time.  
Hour : Minutes  
L
A
Note  
Pressing D in the Timekeeping Mode will display the Last Signal screen.  
Last Signal Screen  
The hands for the analog timepiece move to adjust to a new setting whenever any of  
the following occurs.  
When you change the digital time setting manually  
When the digital time setting is changed by time calibration signal reception  
When you change the Home City code and/or DST setting  
If the analog time does not match the digital time for any reason, use the procedure  
described under “To adjust the analog time” to match the analog setting to the digital  
setting.  
Press D.  
Whenever you need to adjust both the digital and the analog time settings manually,  
make sure you adjust the digital setting first.  
Depending on how much the hands have to move in order to adjust to the digital  
time, it may take some time before they stop moving.  
Setting the Digital Time and Date Manually  
Make sure you select your Home City code before you change the current time and  
date settings. World Time Mode times are all displayed in accordance with the  
Timekeeping Mode settings. Because of this, World Time Mode times will not be  
correct if you do not select the proper Home City code before setting the time and  
date in the Timekeeping Mode.  
To adjust the analog time  
1. In the Timekeeping Mode, press C six times to enter  
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the Hand Setting Mode.  
2. Hold down A until the current digital time starts to  
flash, which indicates the setting screen.  
3. Use D and B to adjust the analog setting as  
described below.  
To set the current digital time and date manually  
1. In the Timekeeping Mode, hold down A until the city  
City code  
code starts to flash, which indicates the setting screen.  
2. Press C to move the flashing in the sequence shown  
below to select other settings.  
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When you want to do this:  
Move the hand setting  
forward 20 seconds  
Perform this button operation:  
Press D.  
Move the hand setting a short  
way forward at high speed  
Hold down D.  
Release D when the hands reach the setting  
you want.  
12/24-Hour  
Format  
Move the hand setting a  
long way forward at high  
speed  
While holding down D to move the hands at  
high speed, press B to lock the high-speed  
hand movement.  
To stop the hand movement, press any  
button.  
DST  
Day  
Seconds  
Year  
Hour  
City Code  
Power  
Saving  
Month  
Minutes  
3. When the setting you want to change is flashing, use D to change it as described  
below.  
Hand movement stops automatically if the hour  
hand makes one full (12-hour) revolution.  
Screen:  
To do this:  
Do this:  
4. Press A to exit the setting screen.  
The minute hand will be adjusted slightly to match the seconds when you exit the  
setting screen.  
Change the city code  
Press D (east).  
Cycle between Daylight Saving Time Press D.  
(ON), Standard Time (OFF), and  
Auto DST (AUTO)  
Toggle between 12-hour (12H) and Press D.  
24-hour (24H) timekeeping  
To return to the Timekeeping Mode, press C.  
Power Supply  
This watch is equipped with a solar cell and a special rechargeable battery (secondary  
battery) that is charged by the electrical power produced by the solar cell. The  
illustration shown below shows how you should position the watch for charging.  
Reset the seconds to 00  
Press D.  
Change the hour or minutes  
Press D (+).  
Example: Orient the watch so its face  
is pointing at a light source.  
Solar cell  
The illustration shows how to position  
a watch with a resin band.  
Change the year  
Note that charging efficiency drops  
when any part of the solar cell is  
blocked by clothing, etc.  
You should try to keep the watch  
outside of your sleeve as much as  
possible. Charging is reduced  
significantly if the face is only partially  
covered.  
Change the month or day  
Toggle Power Saving on (PSON)  
and off (PSOF)  
Press D.  
See “City Code Table” for a complete list of available city codes.  
Auto DST (AUTO) can be selected only while LIS, LON, MAD, PAR, ROM, BER,  
STO, ATH, MOW, HKG, BJS, TPE, SEL, TYO, HNL, ANC, YVR, LAX, YEA, DEN,  
MEX, YWG, CHI, MIA, YTO, NYC, YHZ, or YYT is selected as the Home City code.  
For more information, see “Daylight Saving Time (DST)” below.  
For information about settings other than the time and date, see the following.  
Power Saving: Power Saving Function  
Important!  
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 rechargeable battery  
power to run down. Make sure that the watch is normally exposed to bright light  
whenever possible.  
4. Press A to exit the setting screen.  
Daylight SavingTime (DST)  
This watch uses a special rechargeable battery to store power produced by the solar  
cell, so regular battery replacement is not required. However, after very long use, the  
rechargeable battery may lose its ability to achieve a full charge. If you experience  
problems getting the special rechargeable battery to charge fully, contact your dealer  
or CASIO distributor about having it replaced.  
Never try to remove or replace the watch’s special battery yourself. Use of the wrong  
type of battery can damage the watch.  
The current time and all other settings return to their initial factory defaults whenever  
battery power drops to Level 5 and when you have the battery replaced.  
Turn on the watch’s Power Saving function and keep it in an area normally exposed  
to bright light when storing it for long periods. This helps to keep the rechargeable  
battery from going dead.  
Daylight Saving Time (summer time) advances the time setting by one hour from  
Standard Time. Remember that not all countries or even local areas use Daylight  
Saving Time.  
The time calibration signals transmitted from Mainflingen (Germany), Rugby  
(England), or Fort Collins (the United States) include both Standard Time and DST  
data. When the Auto DST setting is turned on, the watch switches between Standard  
Time and DST (summer time) automatically in accordance with the signals.  
The time calibration signals transmitted from Fukushima and Fukuoka/Saga (Japan)  
do not include summer time data.  
The default DST setting is Auto DST (AUTO) whenever you select LIS, LON, MAD,  
PAR, ROM, BER, STO, ATH, MOW, HKG, BJS, TPE, SEL, TYO, HNL, ANC, YVR,  
LAX, YEA, DEN, MEX, YWG, CHI, MIA, YTO, NYC, YHZ, or YYT as your Home City  
code.  
If you experience problems receiving the time calibration signal in your area, it is  
probably best to switch between Standard Time and Daylight Saving Time (summer  
time) manually.  
To check the current battery level  
Press C to display the battery level indicator.  
Battery level indicator  
4
 
Operation Guide 4765  
Reference  
This section contains more detailed and technical information about watch operation.  
It also contains important precautions and notes about the various features and  
functions of this watch.  
The battery level indicator shows you the current power level of the rechargeable battery.  
Level Battery Level Indicator  
Function Status  
Power Saving Function  
1
All functions enabled.  
When turned on, the Power Saving function enters a sleep  
state automatically whenever the watch is left in an area  
Power saving indicator  
where it is dark for a certain period. The table below  
shows how watch functions are affected by the Power  
Saving function.  
2
All functions enabled.  
l
Alarm, hourly time signal, illumination and  
time calibration signal reception disabled.  
3
(Charge Soon Alert)  
l
4
All functions disabled.  
(Charge Soon Alert)  
Elapsed Time  
in Dark  
Displa  
Operation  
All functions, including timekeeping,  
disabled and initialized.  
5
60 to 70 minutes Blank, with Power Saving  
indicator ( ) flashing  
All functions enabled, except  
for the display  
The flashing Low indicator (L) at Level 3 and the flashing charge indicator (C) at  
Level 4 tell you that battery power is very low, and that exposure to bright light for  
charging is required as soon as possible.  
At Level 5, all functions are disabled and settings return to their initial factory  
defaults. Functions are enabled once again after the rechargeable battery is  
charged, but you need to set the time and date, after the battery reaches Level 4  
(indicated by the flashing charge indicator (C)) from Level 5.You will not be able to  
configure any of the other settings until the battery reaches Level 3 (no charge  
indicator) after dropping to Level 5.  
6 or 7 days  
Blank, with Power Saving  
indicator ( ) not flashing  
Beeper tone, illumination, and  
display disabled  
Analog timekeeping stopped  
at 12 o’clock  
Auto receive disabled  
Wearing the watch inside the sleeve of clothing can cause it to enter the sleep state.  
The watch will not enter the sleep state between 6:00 AM and 9:59 PM. If the watch  
is already in the sleep state when 6:00 AM arrives, however, it will remain in the  
sleep state.  
Leaving the watch in direct sunlight or some other very strong light source can cause  
the battery level indicator to show a reading that is momentarily higher than the actual  
battery level. The correct battery level indicator should appear after a few minutes.  
To recover from the sleep state  
Perform any one of the following operations.  
Move the watch to a well-lit area.  
Press any button.  
The watch’s Home City code setting will change automatically to TYO (Tokyo)  
whenever the battery drops to Level 5. With this Home City code setting, the watch is  
configured to receive the time calibration signals of Japan. If you are using the watch  
in North America or Europe, you will need to change the Home City code setting to  
match your location whenever the battery drops to Level 5.  
If you use the illumination or alarms a number of times during a short period, the  
hands of the watch will stop. Battery Level Indicator will show “R” at this time. Also,  
the following operations will become disabled until battery power recovers.  
Illumination  
Beeper tone  
Time calibration signal reception  
After some time, battery power will recover and the above functions will be enabled  
again.  
To turn Power Saving on and off  
1. In the Timekeeping Mode, hold down A until the city  
On/Off status  
code starts to flash, which indicates the setting screen.  
2. Press C nine times until the Power Saving on/off  
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screen appears.  
3. Press D to toggle Power Saving on (PSON) and off  
(PSOF).  
4. Press A to exit the setting screen.  
The Power Saving indicator ( ) is on the display in all  
modes while Power Saving is turned on.  
Button Operation Tone  
Charging Precautions  
In any mode (except when a setting screen is on the display), hold down C for about  
Certain charging conditions can cause the watch to become very hot. Avoid leaving  
the watch in the areas described below whenever charging its rechargeable battery.  
Also note that allowing the watch to become very hot can cause its liquid crystal  
display to black out. The appearance of the LCD should become normal again when  
the watch returns to a lower temperature.  
three seconds to toggle the button operation tone on and off. The button operation  
tone off indicator (  
) is displayed while the tone is turned off.  
Even if the button operation tone is turned off, the daily alarm and countdown timer  
alarm continue to sound when required.  
Auto Return Features  
Warning!  
If you leave the watch in the Alarm or Hand Setting Mode, or with the Battery Level  
indicator displayed for two or three minutes without performing any operation, it  
automatically returns to the Timekeeping Mode.  
If you leave the watch with a flashing setting on the display for two or three minutes  
without performing any operation, the watch automatically exits the setting screen.  
Leaving the watch in bright light to charge its rechargeable battery 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  
Scrolling  
The B and D buttons are used in various modes and setting screens to scroll  
through data on the display. In most cases, holding down these buttons during a scroll  
operation scrolls through the data at high speed.  
Charging Guide  
After a full charge, timekeeping remains enabled for up to about 7 months.  
The following table shows the amount of time the watch needs to be exposed to light  
each day in order to generate enough power for normal daily operations.  
Initial Screens  
When you enter the World Time Mode, the data you were viewing when you last exited  
the mode appears first.  
Exposure Level (Brightness)  
Outdoor Sunlight (50,000 lux)  
Approximate Exposure Time  
8 minutes  
Radio-controlled Atomic Timekeeping Precautions  
Sunlight Through a Window (10,000 lux)  
30 minutes  
Strong electrostatic charge can result in the wrong time being set.  
The time calibration signal bounces off the ionosphere. Because of this, such factors  
as changes in the reflectivity of the ionosphere, as well as movement of the  
ionosphere to higher altitudes due to seasonal atmospheric changes or the time of  
day may change the reception range of the signal and make reception temporarily  
impossible.  
Daylight Through a Window on a Cloudy Day  
(5,000 lux)  
48 minutes  
Indoor Fluorescent Lighting (500 lux)  
8 hours  
Since these are the specs, we can include all the technical details.  
Display on 18 hours per day, sleep state 6 hours per day  
1 illumination operation (1.5 seconds) per day  
Even if the time calibration signal is received properly, certain conditions can cause  
the time setting to be off by up to one second.  
10 seconds of alarm operation per day  
The current time setting in accordance with the time calibration signal takes priority  
over any time settings you make manually.  
The watch is designed to automatically update the date and day of the week for the  
period January 1, 2000 to December 31, 2099. Setting of the date by the time  
calibration signal cannot be performed starting from January 1, 2100.  
This watch can receive signals that differentiate between leap years and non-leap  
years.  
10 minutes of signal reception per day  
Stable operation is promoted by frequent exposure to light.  
RecoveryTimes  
The table below shows the amount exposure that is required to take the battery from  
one level to the next.  
Exposure Level  
(Brightness)  
Approximate Exposure Time  
Though this watch is designed to receive both time data (hour, minutes, seconds)  
and date data (year, month, day), certain signal conditions can limit reception to time  
data only.  
Level 5 Level 4 Level 3  
Level 2  
Level 1  
Normally, the signal reception date shown by the Last Signal screen is the date data  
included in the received time calibration signal. When only time data is received,  
however, the Last Signal screen shows the date as kept in the Timekeeping Mode at  
the time of signal reception.  
If you are in an area where proper time calibration signal reception is impossible, the  
watch keeps time within 15 seconds a month at normal temperature.  
If you have problems with proper time calibration signal reception or if the time  
setting is wrong after signal reception, check your current city code, DST (summer  
time), and auto receive settings.  
Outdoor Sunlight (50,000 lux)  
2 hours  
7 hours  
25 hours 6 hours  
94 hours 22 hours  
152 hours 35 hours  
– – –  
Sunlight Through a Window  
(10,000 lux)  
Daylight Through a Window on  
a Cloudy Day (5,000 lux)  
10 hours  
126 hours  
Indoor Fluorescent Lighting  
(500 lux)  
The above exposure time values are all for reference only. Actual required exposure  
times depend on lighting conditions.  
5
 
Operation Guide 4765  
Timekeeping  
Resetting the seconds to 00 while the current count is in the range of 30 to 59  
causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are  
reset to 00 without changing the minutes.  
The day of the week is automatically displayed in accordance with the date (year,  
month, and day) settings.  
The year can be set in the range of 2000 to 2099.  
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 battery replaced or when battery power drops to  
Level 5.  
The current time for all city codes in the Timekeeping Mode and World Time Mode is  
calculated in accordance with the Greenwich Mean Time (GMT) differential for each  
city, based on your Home City time setting.  
The times for the Timekeeping Mode and all the city codes of the World Time Mode  
are calculated in accordance with each city’s UTC differential.  
The UTC differential is a value that indicates the time difference between a  
reference point in Greenwich, England and the time zone where a city is located.  
The letters “UTC” is the abbreviation for “Universal Time Coordinated”, which is the  
world-wide scientific standard of timekeeping. It is based upon carefully maintained  
atomic (cesium) clocks that keep time accurately to within microseconds. Leap  
seconds are added or subtracted as necessary to keep UTC in sync with the Earth’s  
rotation.  
12-hour/24-hour Timekeeping Formats  
The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is also  
applied in all other modes.  
With the 12-hour format, the PM indicator (P) appears on the display for times in the  
range of noon to 11:59 p.m. and no indicator appears for times in the range of  
midnight to 11:59 a.m.  
With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without  
any indicator.  
Illumination Precautions  
Illumination may be hard to see when viewed under direct sunlight.  
Illumination automatically turns off whenever an alarm sounds.  
Frequent use of illumination runs down the battery.  
City Code Table  
City  
Code  
PPG  
HNL  
ANC  
YVR  
LAX  
YEA  
DEN  
MEX  
YWG  
CHI  
GMT  
Differential  
–11.0  
City  
Other major cities in same time zone  
Papeete  
Pago Pago  
Honolulu  
Anchorage  
Vancouver  
Los Angeles  
Edmonton  
Denver  
Mexico City  
Winnipeg  
Chicago  
Miami  
Toronto  
New York  
Caracas  
Halifax  
St. Johns  
Rio De Janeiro  
Praia  
–10.0  
–09.0  
Nome  
San Francisco, Las Vegas,  
Seattle/Tacoma, Dawson City, Tijuana  
–08.0  
–07.0  
El Paso, Edmonton, Culiacan  
–06.0  
Houston, Dallas/Fort Worth, New Orleans  
MIA  
Montreal, Detroit, Miami, Boston,  
Panama City, Havana, Lima, Bogota  
YTO  
NYC  
CCS  
YHZ  
YYT  
RIO  
–05.0  
–04.0  
La Paz, Santiago, Port Of Spain  
–03.5  
–03.0  
–01.0  
Sao Paulo, Buenos Aires, Brasilia, Montevideo  
RAI  
LIS  
Lisbon  
+00.0  
Dublin, Casablanca, Dakar, Abidjan  
LON  
MAD  
PAR  
ROM  
BER  
STO  
ATH  
CAI  
JRS  
MOW  
JED  
THR  
DXB  
KBL  
KHI  
London  
Madrid  
Paris  
Rome  
Berlin  
Stockholm  
Athens  
Cairo  
Jerusalem  
Moscow  
Jeddah  
Tehran  
Dubai  
Kabul  
Karachi  
Delhi  
+01.0  
Milan, Amsterdam, Algiers, Hamburg, Frankfurt, Vienna  
Helsinki, Istanbul, Beirut, Damascus, Cape Town  
Kuwait, Riyadh, Aden, Addis Ababa, Nairobi  
+02.0  
+03.0  
+03.5  
+04.0  
+04.5  
+05.0  
+05.5  
Shiraz  
Abu Dhabi, Muscat  
Male  
DEL  
Mumbai, Kolkata, Colombo  
DAC  
RGN  
BKK  
HKG  
BJS  
TPE  
SEL  
TYO  
ADL  
GUM  
SYD  
NOU  
WLG  
Dhaka  
Yangon  
Bangkok  
Hong Kong  
Beijing  
Taipei  
Seoul  
Tokyo  
Adelaide  
Guam  
Sydney  
Noumea  
Wellington  
+06.0  
+06.5  
+07.0  
Jakarta, Phnom Penh, Hanoi, Vientiane  
+08.0  
Singapore, Kuala Lumpur, Manila, Perth, Ulaanbaatar  
Pyongyang  
Darwin  
+09.0  
+09.5  
+10.0  
Melbourne, Rabaul  
+11.0  
+12.0  
Port Vila  
Christchurch, Nadi, Nauru Island  
Based on data as of December 2006.  
6
 

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