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Operation Guide 3150
7
Illumination
This watch has an EL (electro-luminescent) panel
that causes the entire display to glow for easy
reading in the dark. The watch’s auto light switch
turns on illumination automatically when you
angle the watch towards your face.
• The auto light switch must be turned on
(indicated by the auto light switch on indicator)
for it to operate.
• See “Illumination Precautions” for other
important information about using illumination.
To illuminate the display manually
In any mode, press L to turn on illumination.
• The above operation turns on illumination
regardless of the current auto light switch
setting.
Auto light switch
on indicator
• You can use the procedure below to select either 1.5 seconds or 3 seconds
as the illumination duration. When you press L, the illumination will remain
on for about 1.5 seconds or 3 seconds, depending on the current
illumination duration setting.
To specify the illumination duration
1. In the Timekeeping Mode, hold down A until
the display contents start to flash. This is the
setting screen.
2. Press the C button three times to move the
flashing to the seconds.
3. While the seconds are flashing, press B to
toggle the setting between 1.5 seconds (
)
and 3 seconds (
).
4. Press A to exit the setting screen.
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About the Auto Light Switch
Turning on the auto light switch causes illumination to turn on, whenever you
position your wrist as described below in any mode.
Moving the watch to a position that is parallel to the ground and then tilting it
towards you more than 40 degrees causes illumination to turn on.
• Wear the watch on the outside of your wrist.
Parallel to
ground
More than
40°
Warning!
••
••
• Always make sure you are in a safe place whenever you are reading
the display of the watch using the auto light switch. Be especially
careful when running or engaged in any other activity that can result
in accident or injury. Also take care that sudden illumination by the
auto light switch does not startle or distract others around you.
••
••
• When you are wearing the watch, make sure that its auto light switch
is turned off before riding a bicycle or operating a motorcycle or any
other motor vehicle. Sudden and unintended operation of the auto
light switch can create a distraction, which can result in a traffic
accident and serious personal injury.
To turn the auto light switch on and off
In the Timekeeping Mode, hold down L for about three seconds to toggle the
auto light switch on (A.EL displayed) and off (A.EL not displayed).
• The auto light switch on indicator (A.EL) is on the display in all modes while
the auto light switch is turned on.
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.
Charging is reduced significantly if the
face is covered only partially.
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. 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 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.
• All data stored in memory is deleted, and 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.
Battery Power Indicator and Recover Indicator
The battery power indicator on the display shows you the current status of the
rechargeable battery’s power.
Level
1
2
3
4
5
Battery Power Indicator
(Charge Soon Alert)
Function Status
All functions enabled.
All functions enabled.
Auto and manual receive,
illumination, and beeper
disabled.
Except for timekeeping and
the C (charge) indicator, all
functions and display
indicators disabled.
All functions disabled.
Battery power
indicator
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• The flashing LOW indicator at Level 3 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, all functions are disabled and settings return to their initial
factory defaults. Once the battery reaches Level 2 after falling to Level 5,
reconfigure the current time, date, and other settings.
• 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, or China you
will need to change the Home City code setting to match your location
whenever the battery drops to Level 5.
• Display indicators reappear as soon as the battery is charged from Level 5
to Level 2.
• 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.
• Performing illumination, or beeper operations
during a short period may cause
(recover) to appear on the display. Illumination,
alarm, countdown timer alarm, and hourly time
signal will be disabled until battery power
recovers.
After some time, battery power will recover and
(recover) will disappear, indicating that
the above functions are enabled again.
• If
(recover) appears frequently, it probably means that remaining
battery power is low. Leave the watch in bright light to allow it to charge.
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Recover indicator
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