Casio 4390 Owner's Manual

MO0901-EA

MODULE NO. 4390

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.

•Be sure to keep all user documentation handy for future reference.

•This watch does not have a city code that corresponds to the UTC offset of –3.5 hours. Because of this, the radio-controlled atomic timekeeping function will not display the correct time for Newfoundland, Canada.

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Keep the watch exposed to bright light

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l

Bright light					l
l l l l			l	l
	l	l

Solar cell

The electricity generated by the solar cell of the watch is 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.

•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. Even if the face of the watch is blocked only partially from light, charging will be reduced significantly.

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•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.

Solar cell

(Converts light to Bright light

electrical power.) Electrical energy

		LEVEL 1	All
			functions
	Charge
		LEVEL 2	enabled.

	Dis-	LEVEL 1		Some
	charge	LEVEL 2		functions
				disabled.

Rechargeable battery

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•The actual level at which some functions are disabled depends on the watch model.

•Be sure to read “Power Supply” (page E-47) for important information you need to know when exposing the watch to bright light.

If the analog hands aren’t moving...

If the analog hands aren’t moving, it means that the power saving mode has stopped them to save battery power.

•See “Power Saving” (page E-56) for more information.

•The hands also stop when the watch’s battery runs down.

Note that CASIO COMPUTER CO., LTD. assumes no responsibility for any damage or loss suffered by you or any third party arising through the use of this product or its malfunction.

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About This Manual

Hour hand Minute hand

30

Day

Second hand

•Button operations are indicated using the letters shown in the illustration.

•Each section of this manual provides you with the information you need in order to perform operations in each mode. Further details and technical information can be found in the “Reference” section.

•To ensure that this watch provides you with the years of service for which it is designed, be sure to carefully read and follow the instructions under “Operating Precautions” and “User Maintenance”.

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Contents

General Guide .........................................................................................................	E-8
Radio-controlled Atomic Timekeeping ...............................................................	E-11
World Time .............................................................................................................	E-33
Configuring Time and Date Settings Manually ...................................................	E-37
Auto Hand Home Position Correction .................................................................	E-41
Manual Home Position Correction ......................................................................	E-44
Power Supply ........................................................................................................	E-47
Reference ..............................................................................................................	E-53
Specifications .......................................................................................................	E-58
Operating Precautions .........................................................................................	E-60
User Maintenance .................................................................................................	E-68

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Procedure Lookup

The following is a handy reference list of all the operational procedures contained in this manual.

To specify your Home City ...................................................................................	E-12
To check the current Home City STD/DST setting .............................................	E-14
To perform manual receive ..................................................................................	E-28
To check the latest signal reception results ......................................................	E-30
To search for a city ...............................................................................................	E-34
To check whether a time zone time is AM or PM ...............................................	E-34
To change the STD/DST setting of a particular city code .................................	E-35
To check the STD/DST setting for a World Time Mode city ...............................	E-36

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To trigger the auto hand home position correction operation manually .........	E-42
To recover from the sleep state ...........................................................................	E-57

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General Guide

Timekeeping	Receive Status	Manual Receive	Setting Mode
Mode	Check (page E-30)	(page E-28)	(pages E-12, E-44)
30	30	30	30

▲ ▲

▲

Press A.
▲
Hold down A for	about two seconds.
	▲
Press any button.
Hold down A for	about five seconds.
Press A.

▲

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•Press C to change the mode.

•Except while the watch is performing auto hand home position correction, holding down C for about two seconds will return directly to the Timekeeping Mode.

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Timekeeping Mode

Hour hand	Minute hand
		Press C.
	30	▲

Day

Second hand

Timekeeping Mode Operations

•To check the current Home City setting by pressing D (page E-12)

•To check the latest signal reception results by pressing A (page E-30)

▲

World Time Mode

(page E-33)

30

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Radio-controlled Atomic Timekeeping

This watch receives a time calibration signal and updates its time setting accordingly.

•Supported time calibration signals: Germany (Mainflingen), England (Anthorn), United States (Fort Collins), China (Shangqiu), and Japan (Fukushima or Fukuoka/Saga)

•See the information under “Signal Reception Troubleshooting” (page E-31) if you experience problems with time calibration signal reception.

Current Time Setting

This watch adjusts its time setting automatically in accordance with a time calibration signal. You also can 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, which is the city where you normally will use the watch. For more information, see “To specify your Home City” on page E-12.

•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 “Configuring Time and Date Settings Manually” (page E-37) for more information about manual time settings.

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	To specify your Home City
		1. Press C to enter the World Time Mode.
		2. Use D to move the second hand clockwise to the city
		code you want to use as your Home City.
		• Note that it can take as long as one minute for the
	30	hands to move to the applicable time.
		• All operations except for the following are disabled
		while the watch’s hands are moving to the current
		time for a newly selected city code.
		D: City selection
		C: Timekeeping Mode
	City code	• For information about the Home City, see “Home City
		Codes and Transmitters” (page E-14). The watch will

Second hand	receive the time calibration signal of the transmitter of
	the selected city code.

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3.Hold down A for about two seconds to toggle the current Home City between standard time (STD) and daylight saving time (DST).

•See “To change the STD/DST setting of a particular city code” (page E-35) for details.

4.After the settings are the way you want, hold down B for about three seconds until the watch returns to the Timekeeping Mode.

•As you hold down B, the second hand will move to either AM or PM, and then the watch will enter the Timekeeping Mode.

•Normally, your watch should show the correct time as soon as you specify your Home City code. If it does not, it should adjust automatically after the next auto receive operation. You also can perform manual receive (page E-28) or you can set the time manually (page E-37).

•Even if the time calibration signal is received correctly, there are some times when the analog hands may not indicate the correct time. If this happens, use the procedures under “Auto Hand Home Position Correction” (page E-41) to check the home positions of the hands, and make adjustments as required.

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To check the current Home City STD/DST setting

1.In the Timekeeping Mode, press D. This will cause the second hand to move to the current Home City setting.

2.The second hand will move to either STD (standard time) or DST (daylight saving time) after about two seconds or if you press D.

3.The watch will return to the Timekeeping Mode after about two seconds or if you press D.

Home City Codes and Transmitters

•The time calibration signal the watch will attempt to pick up depends on its current Home City code setting as shown below. If you use the watch in Japan or Europe (each of which has two different transmitter locations), it will try to receive the time calibration signal from one of the transmitters in your current location. If it cannot receive the signal, it will then try to receive the time calibration signal from the other transmitter.

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	Home City Code	Transmitter	Frequency
	LON: London	German/U.K. Signals	60.0 kHz
	PAR: Paris	Anthorn (England)
			77.5 kHz
	ATH: Athens	Mainflingen (Germany)
	HKG: Hong Kong	China Signal	68.5 kHz
		Shangqiu City (China)
		Japan Signals	40.0 kHz
	TYO: Tokyo	Fukushima (Japan)
			60.0 kHz
		Fukuoka/Saga (Japan)
	(HNL): Honolulu	U.S. Signal	60.0 kHz
	(ANC): Anchorage	Fort Collins, Colorado
	LAX: Los Angeles	(the United States)
	DEN: Denver
	CHI: Chicago
	NYC: New York

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•City codes in parentheses indicate areas where reception may be possible only when conditions are good.

•For full information on city codes, see the “City Code Table” at the back of this manual.

•In addition to the above, you also can select city codes that are outside the ranges of the time calibration signal transmitters supported by this watch.

•Note that this watch does not have a city code that corresponds to Newfoundland.

•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.

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Approximate Reception Ranges

U.K. and German Signals

1,500 kilometers

Mainflingen

Anthorn

U.S. Signal

500 kilometers

The Anthorn signal is receivable within this area.

2,000 miles

(3,000 kilometers)

600 miles

(1,000 kilometers)

Fort Collins

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Japan Signals

500 kilometers

Fukuoka/Saga

1,000 kilometers

500 kilometers

Fukushima

1,000 kilometers

China Signal

1,500 kilometers

500 kilometers

Chengdu

Shangqiu

Changchun

Beijing

Shanghai

Hong Kong

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•Signal reception may not be possible up to the distances noted below during certain times of the year or day. Radio interference may also cause problems with reception.

Mainflingen (Germany) or Anthorn (England) transmitters: 500 kilometers (310 miles)

Fort Collins (United States) transmitter: 600 miles (1,000 kilometers) Fukushima or Fukuoka/Saga (Japan) transmitters: 500 kilometers (310 miles) Shangqiu (China) transmitter: 500 kilometers (310 miles)

•Even when the watch is within the reception range of the transmitter, signal reception will be impossible if the signal is blocked by mountains or other geological formations between the watch and signal source.

•Signal reception is affected by weather, atmospheric conditions, and seasonal changes.

•See the information under “Signal Reception Troubleshooting” (page E-31) if you experience problems with time calibration signal reception.

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Daylight Saving Time (DST)

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.

• Note that the start and end of daylight saving time, and whether it is used at all depends on each country and geographic area.

• You can check the current DST setting, which is indicated by the second hand, for your Home City (page E-12) or any World Time City (page E-33).

When the second hand points here:	It indicates this:
STD	Standard time
DST	Daylight saving time

• The watch will adjust the DST setting automatically when it receives a time calibration signal while any one of the following city codes is selected as the Home City.

LON, PAR, ATH, TYO, ANC, LAX, DEN, CHI, NYC

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•The watch will not adjust the DST setting automatically while either of following city codes is selected as the Home City. In this case, you will need to change between standard time and daylight saving time manually.

HKG, HNL

•As of June 2008, China does not use Daylight Saving Time (DST). If China does go to the Daylight Saving Time system in the future, some functions of this watch may no longer operate correctly.

•If you experience problems receiving the time calibration signal in your area, it probably is best to switch between Standard Time and Daylight Saving Time (summer time) manually.

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