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Operation Guide 4777
4
3. After confirming that the hour and minute hands are in
the correct home position, press C. This will advance
to day of the week hand home position adjustment.
The day of the week hand is in the correct home
position if it is pointing at “60”. If it isn’t, use D (+) and
B (–) to move the hand to “60”.
4. After confirming that the day of the week hand is in the
correct home position, press C. This will advance to
date home position adjustment.
The date is in the correct home position if it shows “1”.
If it doesn’t, use D (+) and B (–) to change the date
to “1”.
5. Press A to return to the Timekeeping Mode.
After you complete the home position adjustment
procedure, place the watch in a location that allows
good time calibration signal reception, and then perform
a manual receive operation. See “To perform manual
receive” for more information.
1
1
Date
30
Day of the week hand
Correct day of the week
hand home position
Correct date home position
Timekeeping
Use the Timekeeping Mode to set and view the current
time and date. This section also explains how to set the
current date and time manually.
All of the operations in this section are performed in the
Timekeeping Mode.
To set the time and date manually
1. In the Timekeeping Mode, hold down A for about five
seconds. The watch will beep once after about two
seconds, and then twice after about three more seconds.
The stopwatch second hand will move to the city code
of the currently selected Home City. This is the city
code setting mode.
The second hand will stop at “0”.*
* Some models show “60” instead of “0”.
2. Use D to change the Home City setting.
All hands (except for the second hand) and the date
display will change automatically to the current time
and date settings.
30
Hour hand
Date
Second hand
Minute hand
24-hour
hand
Day of the
week hand
Stopwatch second hand
All button operations are disabled while the hands and date display are changing.
For full information on city codes, see the “City Code Table”.
3. Use B to cycle through the DST settings in the sequence shown below.
Auto DST
(AUTO/AT)
DST off (OFF) DST on (ON)
Auto DST (AUTO/AT) can be selected only while LON, PAR, ATH, HNL, ANC,
LAX, DEN, CHI, NYC, HKG, or TYO is selected as the Home City code. For more
information, see “Daylight Saving Time (DST)”.
Even after you change the DST setting, you can still use D to select a different
Home City code if you want.
4. After the Home City and DST settings are the way you want, press C.
This will cause the watch to beep and the stopwatch second hand to move to the
12 o’clock position. This is the time setting mode.
5. Use D (+) and B (–) to change the time (hour and
minute) setting.
As you set the time, take care to ensure that the 24-
hour hand also is at the correct position.
6. After the time setting is the way you want, press C.
The watch will beep and enter the date setting mode.
7. Use D (+) and B (–) to change the date setting.
8. After the date setting is the way you want, press C.
The watch will beep and enter the day of the week
setting mode.
9. Use D (+) to change the day of the week setting.
Pressing C will return to the city code setting mode.
10. After all the settings are the way you want, press A to enter the Timekeeping Mode.
You can press A at any time during the above procedure to return to the
Timekeeping Mode.
30
Stopwatch second hand
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.
Example: Orient the watch so its face is
pointing at a light source.
The illustration shows how to position
a watch with a resin band.
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. Even if the face of the watch
is blocked from light only partially,
charging will be reduced significantly.
Solar cell
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 exposed to bright light whenever
possible.
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 3 and when you have the battery replaced.
Keep the watch in an area normally exposed to bright light when storing it for long
periods. This helps to keep the rechargeable battery from going dead.
Battery Power Levels
The movement of the analog hands indicates the current battery power level.
The second hand jumping every two seconds (Level 2) indicates that battery power
is quite low. Expose the watch to light as soon as possible to charge the battery.
When battery power is at Level 2, time calibration signal reception is disabled.
Hand Movement
Normal.
Second hand jumps
every 2 seconds.
Date changes to home
position.
Second hand stopped.
Hour and minute hands
stopped at 12 o’clock.
Level
1
2
3
Function Status
All functions enabled.
All functions disabled,
except for analog
timekeeping and
stopwatch.
All functions disabled.
30
Jumps 2 seconds
Alarm operation can cause hand movement to stop due to the sudden temporary
drop in battery power. This does not indicate malfunction, and normal operation will
resume when the watch is exposed to light. Though hand movement stops,
timekeeping continues internally, and the hands will be adjusted to the correct
setting when normal operation returns.
At Level 3, all functions are disabled and settings return to their initial factory
defaults. The watch will continue to keep time internally for about one month after the
battery drops to Level 3. If you recharge the battery sufficiently during this period,
the analog hands will move automatically to the correct setting and normal
timekeeping will resume.
Internal timekeeping will stop and the Home City setting will change to Tokyo (TYO)
automatically if you leave the watch in the dark for about one month after the battery
level drops to Level 3. 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 3.
Charging Precautions
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.
Warning!
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
Charging Guide
After a full charge, timekeeping remains enabled for up to about five 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.
Since these are the specs, we can include all the technical details.
Watch is not exposed to light
Internal timekeeping
Analog hands operational 18 hours per day, sleep state 6 hours per day
10 seconds of alarm operation per day
1 time calibration reception per day
Stable operation is promoted by frequent charging.
Exposure Level (Brightness)
Outdoor sunlight (50,000 lux)
Sunlight through a window (10,000 lux)
Daylight through a window on a cloudy day
(5,000 lux)
Indoor fluorescent lighting (500 lux)
Approximate Exposure Time
8 minutes
30 minutes
48 minutes
8 hours
Recovery Times
The table below shows the amount exposure that is required to take the battery from
one level to the next.
The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
20 hours
76 hours
– – –
– – –
Outdoor sunlight (50,000 lux)
Sunlight through a window
(10,000 lux)
Daylight through a window on
a cloudy day (5,000 lux)
Indoor fluorescent lighting
(500 lux)
Approximate Exposure Time
Level 3 Level 2 Level 1
1 hour
2 hours
4 hours
37 hours
Exposure Level
(Brightness)
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.
Auto Return Features
If you leave the watch in the Alarm Mode for two or three minutes without performing
any operation, it returns to the Timekeeping Mode automatically.
If you do not perform any operation for about two or three minutes while a setting
mode is selected, the watch will exit the setting mode automatically.
High-Speed Movement
The D and B buttons are used to change the hand setting in various setting
modes. In most cases, holding down these buttons will start high-speed movement
of the applicable hand(s) and day.
High-speed movement of the hands and day will continue until you press any button,
or until the moving hand(s) and day finish one complete cycle.
One complete cycle for the hands is one revolution (360 degrees) or 24 hours.
One complete cycle for the day is 31 days.
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