Operation Guide 5117
To turn an alarm on and off
1. In the Alarm Mode, use D to select an alarm.
Snooze alarm indicator | 2. Press A to toggle it on and off. |
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Alarm on • The current on/off status of an alarm ( | , | , | |||
indicator | , | or | ) is indicated by “ | ” (ON) or “ ” | |
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| (OFF) on its Alarm Mode screen. |
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| • In all modes, the alarm on indicator is shown for any | ||||
| alarm that is currently turned on. |
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| • The alarm on indicator flashes while the alarm is |
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| • The snooze alarm indicator flashes while the snooze | ||||
| alarm is sounding and during the | ||||
| between alarms. |
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ON |
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To turn the Hourly Time Signal on and off |
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Hourly time signal | 1. In the Alarm Mode, use D to select the Hourly Time | ||||
Signal ( | ). |
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on indicator |
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2. Press A to toggle it on and off. |
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| • The Hourly Time Signal on indicator is shown on the | ||||
| display in all modes while this function is turned on. | ||||
Illumination
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.
•The current time and all other settings return to their initial factory defaults whenever battery power drops to Level 5 (C) 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 Power Recovery Mode indicator
The battery power indicator indicates you the current status of the rechargeable battery’s power.
Level | Battery Power Indicator | Function Status | ||
1 |
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| All functions enabled. | |
(H) |
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2 |
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| All functions enabled. | |
(M) |
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3 | lll lll | Auto and manual receive, | ||
(L) | l | l | illumination, and beeper | |
l | l | |||
Battery Power | ll ll |
| disabled. | |
(Charge Soon Aler t) | ||||
indicator |
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| Except for timekeeping, all | ||
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(C) |
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| functions and display | |
Auto light switch on indicator
An LED
•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 (except when a setting screen is on the display), press B to turn on the illumination for about one second.
•The above operation turns on illumination regardless of the current auto light switch setting.
| indicators disabled. |
5 | All functions disabled. |
(C) |
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• The flashing 
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 (C), all functions are disabled and settings return to their initial factory |
defaults. Once the battery reaches Level 2 (M) after falling to Level 5 (C), reconfigure |
the current time, date, and other settings. |
• Display indicators reappear as soon as the battery is charged from Level 5 (C) to |
Level 2 (M). |
• The watch’s Home City code setting will change automatically to TYO (Tokyo) |
whenever the battery drops to Level 5 (C). 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 |
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.
Note that this watch features a “Full Auto LED Light”, so the auto light switch operates only when available light is below a certain level. It does not illuminate the display
City code setting to match your location whenever the battery drops to Level 5 (C). |
• 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. |
under bright light.
•The auto light switch is always disabled, regardless of its on/off setting, when any one of the following conditions exists.
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 | More than |
ground | 40° |
Power recovery mode indicator
•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 normal timekeeping and function will resume as soon as battery power recovers to normal levels, which is indicated
when the R indicator disappears.
•If R (recover) 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.
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 Bfor about three seconds to toggle the auto light switch on (auto light switch on indicator displayed) and off (auto light switch on indicator not displayed).
•The auto light switch on indicator 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 | Solar cell |
pointing at a light source. |
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•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.
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
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 |
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Outdoor Sunlight (50,000 lux) | 8 minutes |
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Sunlight Through a Window (10,000 lux) | 30 minutes |
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Daylight Through a Window on a Cloudy Day (5,000 lux) | 48 minutes |
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Indoor Fluorescent Lighting (500 lux) | 8 hours |
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•For details about the battery operating time and daily operating conditions, see the “Power Supply” section of the Specifications.
•Stable operation is promoted by frequent exposure to light.
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