Casio 4739 Operation Manual Download Page 1

Operation Guide 4739

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MO0907-EA

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.

Keep the watch exposed to bright light

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. Charging is reduced significantly if
the face is only partially covered.

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Bright Light

Solar cell

Battery charges in the light.

Battery discharges in the dark.

All 
functions
enabled

LEVEL 1

LEVEL 2

LEVEL 3

LEVEL 4

Charge

Rechargeable battery

Bright Light

Electrical 
energy

Solar cell
(Converts light to 
electrical power.)

LEVEL 1

LEVEL 2

LEVEL 3

LEVEL 4

Some or all
functions 
disabled

Dis-

charge

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.

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

Frequent display illumination can run down the battery quickly and require charging.
The following guidelines give an idea of the charging time required to recover from a
single illumination operation.

Approximately 5 minutes exposure to bright sunlight coming in through a window
Approximately 50 minutes exposure to indoor fluorescent lighting

Be sure to read “Power Supply” for important information you need to know
when exposing the watch to bright light.

If the display of the watch is blank...

If the display of the watch is blank, it means that the watch’s Power Saving function
has turned off the display to conserve power.

See “Power Saving Function” for more information.

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.

About This  Manual

Depending on the model of your watch, display text
appears either as dark figures on a light background, or
light figures on a dark background. All sample displays
in this manual are shown using dark figures on a light
background.

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

Most of the display examples in this manual show only
the digital display, without the analog hands.

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

Stopwatch Mode

Countdown Timer  Mode

Alarm Mode

Timekeeping Mode

Press 

C

.

World Time  Mode

Hand Setting Mode

General Guide

Press 

C

 to change from mode to mode.

In any mode (except when a setting screen is on the display), press 

B

 to illuminate

the face of the watch.

Battery Level Indicator

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), Japan.

Current Time Setting

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

Minute hand

Hour hand

Month

Day

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 “Timekeeping”
for more information about manual time settings.

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.

The analog time of this watch is synchronized with the digital time. Because of this,
the analog time setting is automatically adjusted whenever you change the digital
setting. See “Analog Timekeeping” for more information.

To specify your Home City

1. In the Timekeeping Mode, hold down 

A

 the city code

starts to flash. This is the setting screen.

2. Press 

D

(east) to select the city code you want to use

as your Home City.

Time calibration signal reception is supported when
any one of the city codes shown in the table below is
selected as your Home City.

German/U.K. Signal

Japan Signal

U.S. Signal

City
Code
LIS
LON
MAD
PAR
ROM
BER
STO

City
Name

Lisbon
London
Madrid
Paris
Rome
Berlin
Stockholm

City
Code
ATH
MOW

City
Name

Athens
Moscow

City
Code
HNL
ANC
YVR
LAX
YEA
DEN
MEX

City
Name

Honolulu
Anchorage
Vancouver
Los Angeles
Edmonton
Denver
Mexico City

City
Code
YWG
CHI
MIA
YTO
NYC
YHZ
YYT

City
Name

Winnipeg
Chicago
Miami
Toronto
New York
Halifax
St. Johns

City
Code
HKG
BJS
TPE
SEL
TYO

City
Name

Hong Kong
Beijing
Taipei
Seoul
Tokyo

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City code

Important!

Normally, your watch should show the correct time as soon as you select your Home
City code. If it does not, it should adjust automatically after the next auto receive
operation (in the middle of the night). You can also perform manual receive or you
can set the time manually.

The watch will receive the time calibration signal automatically from the applicable
transmitter (in the middle of the night) and update its settings accordingly. For
information about the relationship between city codes and transmitters, see “Home
City Codes and Transmitters”.

Under factory default settings, auto receive is turned off for all of the following city
codes: 

MOW

 (Moscow), 

HKG

 (Hong Kong), 

BJS

 (Beijing), 

HNL

 (Honolulu), and

ANC

 (Anchorage). For details about turning on auto receive for these city codes, see

“To turn auto receive on and off”.

You can disable time signal reception, if you want. See “To turn auto receive on and
off” for more information.

3. Press 

A

 to exit the setting screen.

See the maps under “Approximate Reception Ranges” for information about the
reception ranges of the watch.

If you are in an area that does not use Daylight Saving Time (summertime), turn off
the DST setting.

Time Calibration Signal Reception

There are two different methods you can use to receive the time calibration signal:
auto receive and manual receive.

Auto Receive

With auto receive, the watch receives the time calibration signal automatically up to
six times a day. When any auto receive is successful, the remaining auto receive
operations are not performed. For more information, see “About Auto Receive”.

Manual Receive

Manual receive lets you start a time calibration receive operation with the press of a
button. For more information, see “To perform manual receive”.

Important!

The antenna of this watch is located on its 12 o’clock side. Position the watch with
12 o’clock facing towards a window as shown in the nearby illustration. Make sure
there are no metal objects nearby.

12 o’clock

or

Make sure the watch is facing the right way.

Summary of Contents for 4739

Page 1: ...gnal You can also 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 the city where you normally will use the watch For more information see To specify your Home City Minute hand Hour hand Month Day When using the watch outside the areas covered by the time signal transmitters you will have to ad...

Page 2: ...he Timekeeping Mode or World Time Mode Reception is not performed if a calibration time is reached while you are configuring settings Auto receive of the calibration signal is designed to be performed early in the morning while you sleep provided that the Timekeeping Mode time is set correctly Before going to bed for the night remove the watch from your wrist and put it in a location where it can ...

Page 3: ...ons in this section are performed in the Stopwatch Mode which you enter by pressing C Minutes Seconds D Start Stop Elapsed Time Re start Clear D Stop D D A Split Time D Start Split Split release Clear A Stop A D A Two Finishes D Start Split Stop Clear A Split release D A A First runner finishes Display time of first runner Second runner finishes Display time of second runner To measure times with ...

Page 4: ...imekeeping Mode press C six times to enter the Hand Setting Mode 2 Hold down A until the current digital time starts to flash which indicates the setting screen 3 Use D and B to adjust the analog setting as described below When you want to do this Move the hand setting forward 20 seconds Move the hand setting a short way forward at high speed Perform this button operation Press D Hold down D Relea...

Page 5: ...the Alarm or Hand Setting Mode or with the battery level indicator displayed for two or three minutes without performing any operation it automatically returns to the Timekeeping Mode If you leave the watch with a flashing setting on the display for two or three minutes without performing any operation the watch automatically exits the setting screen l l l l l l l l ll l l l l l l l l l l l l l l ...

Page 6: ...mitting diode Other Battery level indicator Power Saving Power Supply Solar cell and a rechargeable battery Approximate Battery Operating Time 12 months from full charge to Level 4 when the watch is not exposed to light under the following conditions Display on 18 hours per day sleep state 6 hours per day 1 illumination operation 1 5 seconds per day 10 seconds of alarm operation per day 10 minutes...

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