G-Shock GW-1000BDJ-8A User Manual
MO0402-EA
Resin Band
Metal Band
Operation Guide 2752
Getting Acquainted
Congratulations upon your selection of this CASIO watch. To get the most out of your
purchase, be sure to carefully read this manual and keep it on hand for later reference
when necessary.
• This watch does not have a time zone that corresponds to the Greenwich
Mean Time differential of –3.5 hours. Because of this, the radio-controlled
timekeeping and World Time functions will not display the correct time for
Newfoundland, Canada.
Expose the watch to bright light to charge its battery before using it.
You can use this watch even as its battery is being charged by exposure to bright
light.
• Be sure to read “Battery” of this manual for important information you need to
know when exposing the watch to bright light.
If the digital display of the watch is blank...
Power saving
indicator
• The Home City reverts to TYO (Tokyo), which means that the watch is
configured to receive the Japanese time calibration signal, whenever battery
power drops to Level 4. If you are using the watch in North America, you will
need to configure your Home City code setting whenever battery power
recovers after dropping to Level 4. See “To set your Home City” for more
information.
General Guide
• Press C to change from mode to mode.
• In any mode, press L to illuminate the display.
If the Power Saving indicator ( ) is flashing on the
display, it means that the display is blank because the
watch’s Power Saving function has turned it off to
conserve power. Power Saving automatically turns off the
display and enters a sleep state whenever your watch is
left for a certain period in an area where it is dark. If the
watch is kept in the dark for a longer period, the analog
hands will also stop moving after a few days.
• The initial factory default setting is Power Saving on.
• The watch will recover from the sleep state if you move it
to a well-lit area, if you press any button, or if you angle
the watch towards your face for reading.
• See “Power Saving Function” for more information.
World Time Mode
About This Manual
(Light)
Alarm Mode Countdown Timer Mode
▲
• 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.
• 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.
▲
Timekeeping Mode
Press C.
▲
▲
Radio-controlled Atomic Timekeeping
Hour hand
Minute hand
Day of week
Seconds
Current Time Setting
This watch automatically adjusts its time setting 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 set your Home City,
which is the city where you will normally use the watch. For more information, see
“To set your Home City” below.
• When using the watch outside the ranges of the U.S. and Japanese time signal
transmitters, you have to adjust the current time setting manually as required. See
“Timekeeping” for more information about manual time setting.
• 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 set your Home City
City code
• Note that this watch does not have a city code that corresponds to Newfoundland.
3. Press A to exit the setting screen.
• 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 (in
the middle of the night). You can also perform manual receive or you can set the time
manually.
• If you are in an area that does not use Daylight Saving Time (summer time), turn off
the DST setting.
This watch receives a time calibration signal and updates
its time setting accordingly. The time calibration signal
includes both Standard Time and Daylight Saving Time
(summer time) data.
• This watch is designed to pick up the time calibration
signal transmitted in the United States (Fort Collins,
Colorado) and the time calibration signals transmitted in
Japan.
• 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.
1. In the Timekeeping Mode, hold down A until the city
code starts to flash, which indicates the setting screen.
2. Use D (east) and B (west) to scroll through the city
codes until the one you want to use as your Home City
l
l
l
l
l
l
l
l
is displayed.
l
l
• The following are the city codes for major cities in
l
l
North America.
: Los Angeles, San Francisco, Las Vegas,
LAX
Seattle, Vancouver, Tijuana
: Denver, El Paso, Edmonton, Culiacan
DEN
: Chicago, Houston, Dallas/Fort Worth, New
CHI
Orleans, Winnipeg, Mexico City
: New York, Detroit, Miami, Boston, Montreal
NYC
: All cities in Japan
TYO
*
.
Hand Setting Mode
▲
To display the digital time and last signal screen
• In the Timekeeping Mode, press B to cycle through the digital time screens as
shown below.
• In the Timekeeping Mode, press D to display the last signal screen. The last signal
screen shows the date and time of the last successful time calibration signal
reception.
DST indicator
Press B.
▲
Day
Day of week
▲
Press D.
Seconds
Day of
week
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 automatically picks up the time calibration signal five
times a day at 0:00 a.m., 1:00 a.m., 2:00 a.m., 3:00 a.m., and 4:00 a.m. For more
information, see “About Auto Receive”.
• Manual Receive
Manual receive lets you start a time calibration signal reception with the press of a
button. For more information, see “To perform manual receive”.
Important!
• When getting ready to receive the time calibration signal, position the watch as
shown in the nearby illustration, with its 12 o’clock side facing towards a window.
Make sure there are no metal objects nearby.
• The watch should not be on its side or facing the wrong way.
Last Signal
Screen
Stopwatch Mode
▲
Seconds
Month. Day
BB
▲
B
Reception date
Seconds
▲
Reception time
Hour:
Minutes
PM
indicator
1
Operation Guide 2752
• Proper signal reception can be difficult or even impossible under the conditions listed
below.
Inside or
among
buildings
• Signal reception is normally better at night than during the day.
• Time calibration signal reception takes from two to six minutes, but in some cases it
can take as long as 12 minutes. Take care that you do not perform any button
operations or move the watch during this time.
• When within range of the applicable transmitter, this watch can receive either the
U.S. (Fort Collins, Colorado) or Japanese (Fukushima or Fukuoka/Saga) time
calibration signal. The signal the watch will attempt to pick up depends on its current
Home City code setting as shown below.
Inside a
vehicle
Home City Code
LAX, DEN, CHI, NYC
With
TYO
*
600 miles
• Under good reception conditions, signal reception is possible within a radius of
about 2,000 miles (3,000 kilometers) from the Fort Collins transmitter.
• At distances further than about 600 miles (1,000 kilometers) from the Fort Collins
transmitter, signal reception may not be possible during certain times of year or
times of day. Radio interferance may also cause problems with reception.
• At distances further than about 500 kilometers from the Fukushima and Fukuoka/
Saga transmitter, signal reception may not be possible during certain times of year
or times of day. Radio interferance may also cause problems with reception.
• See the information under “Signal Reception Troubleshooting” if you experience
problems with time calibration signal reception.
About Auto Receive
When auto receive is turned on, the watch automatically starts to receive the time
calibration signal when the time in the Timekeeping Mode reaches 0:00 a.m., 1:00
a.m., 2:00 a.m., 3:00 a.m., and 4:00 a.m. each day (calibration times). The watch will
also perform an additional auto receive at 5:00 a.m. if none of the regularly scheduled
auto receive operations are successful.
Note
• Auto receive is performed only if the watch is in the Timekeeping Mode or World
Time Mode when one of the calibration times is reached. It is not performed if a
calibration time is reached while an alarm is sounding, or while you are configuring
settings (while settings are flashing on the display).
• Auto receipt 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 easily receive the signal.
• When auto receive is turned on, the watch receives the calibration signal for two to
six minutes everyday when the time in the Timekeeping Mode reaches each of the
five calibration times. Do not perform any button operation within six minutes before
or after any of the five calibration times. Doing so can interfere with correct
calibration.
• Remember that reception of the calibration signal depends on the time kept in the
digital display. Reception will be performed whenever the display shows one of the
five calibration times, regardless of whether or not the displayed time is actually the
correct time.
• When two, three, four, or five receptions are successful, the watch uses the data of
the last reception for calibration. When only one reception is successful, the watch
uses the data of the successful reception.
About the Receiving Indicator
The receiving indicator shows the strength of the calibration signal being received. For
best reception, be sure to keep the watch in a location where signal strength is
strongest.
Receiving indicator
• Even in an area where signal strength is strong, it takes about 10 seconds for signal
reception to stabilize enough for the receiving indicator to indicate signal strength.
• Use the receiving indicator as a guide for checking signal strength and for finding the
best location for the watch during signal reception.
• The Level 4 receiving indicator remains on the display in all modes following
reception of the time calibration signal and calibration of the watch’s time setting.
The Level 4 receiving indicator is not displayed if signal reception was unsuccessful
or after manual adjustment of the current time setting.
• The Level 4 receiving indicator indicates that at least one of the five calibration
signal receive operation was successful. Note, however, that the Level 4 receiving
indicator is cleared from the display at 3:00 a.m. each day.
Near
household
appliances,
office
equipment,
or a mobile
phone
Near a
construction
site, airport, or
other sources
of electrical
noise
Transmitter
Fort Collins, Colorado
TYO
*
Fukushima
Fukuoka/Saga
, you can specify either 40kHz or 60kHz.
Fukuoka/Saga
1,000
kilometers
500
kilometers
2,000 miles
Fort Collins
Weak
(Level 1)
Near hightension
power lines
Frequency
60kHz
40kHz
60kHz
Among or
behind
mountains
500
kilometers
Fukushima
1,000
kilometers
Strong
(Level 4)
To perform manual receive
Receiving indicator
1. Place the watch on a stable surface so its top (12
o’clock side) is facing towards a window.
2. In the Timekeeping Mode, hold down D for about two
seconds until the watch beeps.
3. After you release D, the display will alternate between
the current time and date, and the letters
indicates that signal reception is in progress.
RC!. This
RC!
• Time calibration signal reception normally takes from two to six minutes. In Japan,
however, reception can take up to 12 minutes. Take care that you do not perform any
button operations or move the watch during this time.
• After signal reception is complete, the display of the watch changes to the last signal
screen.
Note
• To interrupt a reception and return to the Timekeeping Mode, press D.
• If the reception is unsuccessful, the message
one or two minutes. After that, the watch returns to the Timekeeping Mode.
• You can also change from the last signal or
screen by pressing D.
ERR appears on the display for about
ERR screen to the normal timekeeping
To configure the auto receive setting for the U.S.
Note
• The following procedure applies when you have
selected as your Home City. If you are using the watch in Japan, see “To configure
auto receive settings for Japan”.
On/Off status
3. Use B and D to turn auto receive on (
4. Press A to exit the setting screen.
• To return to the Timekeeping Mode from the last signal screen, press D.
Signal Reception Troubleshooting
Check the following points whenever you experience problems with signal reception.
Problem
Cannot perform
manual receive.
Auto receive is
turned on, but
the Level 4
receiving
indicator does
not appear on
the display.
Time setting is
incorrect
following signal
reception.
• For further information, see “Important!” under “Time Calibration Signal Reception”
and “Radio-controlled Atomic Timekeeping Precautions”.
1. In the Timekeeping Mode, press D to display the last
signal screen.
• The watch will automatically return to the
Timekeeping Mode if you do not perform any button
l
l
l
l
l
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• The watch is not in the Timekeeping
Mode.
• Your current Home City is not one of the
following city codes: LAX, DEN,
CHI, NYC, or TYO.
• You changed the time setting manually.
• The watch was not in the Timekeeping
or World Time Mode, or you were
performing some button operation
during the auto receive.
• Even if reception is successful, the
Level 4 receiving indicator disappears
every day at 3 a.m.
• Time data (hour, minutes, seconds) only
was received during the last reception.
The Level 4 receiving indicator appears
only when time data and date data
(year, month, day) are both received.
• If the time is one hour off, the DST
setting may be incorrect.
• The Home City code setting is not
correct for the area where you are using
the watch.
operation for two or three minutes after displaying the
l
l
l
last signal screen.
l
l
2. Hold down A until the current auto receive setting
flashes on the display. This is the setting screen.
• If
TYO is selected as the Home City, you can specify
a transmitter selection mode.
Probable Cause
LAX, DEN, CHI, or NYC
ON) or off (OFF).
• Enter the Timekeeping Mode
and try again.
• Select LAX, DEN, CHI,
NYC, or TYO as your Home
City.
• Perform manual receive or
wait until the next auto signal
receive is performed.
• Check to make sure the
watch is in a location where it
can receive the signal.
• Change the DST setting to
Auto DST.
• Select the correct Home City
code.
What you should do
World Time
City code
Mode indicator
Current time in the
selected city code
To view the time in another city
While in the World Time Mode, press D to scroll through the city codes (time zones)
to the east or B to scroll to the west.
• For full information on city codes, see the “City Code Table”.
The World Time Mode digitally displays the current time in
30 cities (29 time zones) around the world.
• Pressing A in the World Time Mode causes the
applicable city code to appear on the digital display for
about one second.
• If the current time shown for a city is wrong, check your
Home City time settings and make the necessary
changes.
• The watch will perform a signal reception even if it is in
the World Time Mode when a calibration time is
reached. If this happens, the World Time Mode time
settings will be adjusted in accordance with the
Timekeeping Mode’s Home City time.
• All of the operations in this section are performed in the
World Time Mode, which you enter by pressing C.
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