Operation Guide 5110
E-50
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. Be 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 panel, 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 (
CHG
) (page E-51) and when you have the battery
replaced.
• Turn on the watch’s Power Saving function (page E-68) 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.
E-51
Battery Power Indicator and Power Recovery Mode indicator
The battery power indicator indicates you the current status of the rechargeable
battery’s power.
Battery Power
indicator
Level Battery Power Indicator Function Status
1
(H)
All functions enabled
2
(M)
All functions enabled
3
(L)
(Charge Soon Alert)
Auto and manual receive,
illumination, and beeper
disabled
4
(CHG)
Except for timekeeping, all
functions and display
indicators disabled
5
(CHG)
All functions disabled
E-52
• The fl
LOW
indicator at Level 3 (
L
) tells you that battery power is very low,
and that exposure to bright light for charging is required as soon as possible.
• At Level 5 (
CHG
), all functions are disabled and settings return to their initial factory
defaults. Once the battery reaches Level 2 (
M
) after falling to Level 5 (
CHG
),
reconfi
• Display indicators reappear as soon as the battery is charged from Level 5 (
CHG
)
to Level 2 (
M
).
• The watch’s Home City code setting will change automatically to
TYO
(Tokyo)
whenever the battery drops to Level 5 (
CHG
). With this Home City code setting, the
watch is confi
the watch in North America or Europe, or China you will need to change the Home
City code setting to match your location whenever the battery drops to Level 5
(
CHG
).
• Leaving the watch exposed to direct sunlight or some other very strong light source
can cause the battery power indicator to show a reading temporarily that is higher
than the actual battery level. The correct battery level should be indicated after a
few minutes.
E-53
• Overuse of display illumination or the beeper can
cause the
R
(Recover) indicator to appear in the upper
display, which indicates that the watch is in the battery
power recovery mode. Face illumination, the alarm, the
countdown timer alarm, time signals, and all hand
operations are disabled in the power recovery mode.
The watch continues to keep time internally, so regular
timekeeping and function will resume as soon as
battery power recovers to normal levels, which is
indicated when the
R
indicator disappears.
• If
R
appears frequently, it probably means that
remaining battery power is low. Leave the watch in
bright light for some time to allow it to charge.
Power recovery
mode indicator
E-54
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.
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.
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
E-55
Charging Guide
After a full charge, timekeeping remains enabled for up to about six 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.
Exposure Level (Brightness) Approximate
Exposure Time
Outdoor sunlight (50,000 lux) 8 minutes
Sunlight through a window (10,000 lux) 30 minutes
Daylight through a window on a cloudy day (5,000 lux) 48 minutes
Indoor fl 8 hours
• For details about the battery operating time and daily operating conditions, see the
“Power Supply” section of the Specifi
• Stable operation is promoted by frequent exposure to light.
E-56
Recovery Times
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
Level 5 Level 4 Level 3 Level 2 Level 1
Outdoor sunlight
(50,000 lux)
2 hours 22 hours 6 hours
Sunlight through a
window (10,000 lux)
7 hours 82 hours 22 hours
Daylight through a
window on a cloudy
day (5,000 lux)
10 hours 133 hours 36 hours
Indoor fl
lighting (500 lux)
113 hours - - - - - - - - - - - - - - - -
• The above exposure time values are all for reference only. Actual required exposure
times depend on lighting conditions.
E-57
Timekeeping
You can adjust the Home City time and date in the Timekeeping Mode manually.
• Pressing
D
in the Timekeeping Mode will toggle the lower display between the
screens shown below.
Home City Date Home City Time
E-58
Read This Before You Set the Time and Date!
This watch is preset with a number of city codes, each of which represents the time
zone where that city is located. When setting the time, it is important that you fi
select the correct city code for your Home City (the city where you normally use the
watch). If your location is not included in the preset city codes, select the preset city
code that is in the same time zone as your location.
•
Note that all of the times for the World Time City codes (page E-29) are displayed in
accordance with the time and date settings you confi
To set the time and date manually
1. In the Timekeeping Mode, hold down
A
for about fi
seconds, until the watch beeps twice and the city code
fl
2. Use
D
and
B
to select the city code you want.
• Ma
chan
• For f
Code T
E-59
3. Press
C
to change the fl
select the other settings.
Seconds
12/24-Hour
Format
Hour
Minutes
DST
Month
Year
City Code
Day
4. When the timekeeping setting you want to change is fl
D
or
B
to
change it as described below.
Screen: To do this: Do this:
Change the city code. Use
D
(east) and
B
(west).
Cycle between Auto DST (
AUTO
), Daylight
Saving Time (
ON
) and Standard Time (
OFF
).
Press
D
.
Toggle between 12-hour ( ) and
24-hour ( ) timekeeping
Press
D
.
