Casio G-Shock MTG-900DJ-4A Operation Manual

MO0603-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.
• • • • • The initial factory default Home City setting is
watch is initially configured to receive the time calibration signals transmitted in
Japan. If you are planning to use the watch in North America, be sure to change
the Home City setting. "To set your Home City" for more information.
• • • • • 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.
Keep the watch exposed to bright light
Bright Light
Solar cell
• 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 cause 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.
Bright Light
Solar cell
(Converts light to
electrical power.)
LEVEL 1
LEVEL 2
Charge
LEVEL 3
Rechargeable battery
General Guide
• Press C to change from mode to mode.
• In any mode, press L to illuminate the display.
Timekeeping Mode
Radio-controlled Atomic Timekeeping
PM
Day of week
indicator
Month – Day
Hour : Minutes 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 of the range of the U.S. and Japanese time signal
transmitters, you need to adjust the time manually as required. See "Timekeeping"
for information about manual settings.
To set your Home City
Transmitter indicator
City code
E/C/M/P indicator
Operation Guide 2639 2819
TYO (Tokyo). This means that the
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
only partially blocked from light, charging will be reduced
significantly.
Battery discharges in the dark.
Electrical
energy
All
LEVEL 1
functions
Dis- LEVEL 2
enabled
charge
LEVEL 3
World Time Mode
Press C.
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 User's Guide refers
*
to the area that consists of Canada, the continental
United States, and Mexico.
1. In the Timekeeping Mode, hold down A until the
transmitter indicator starts to flash, which indicates the
setting screen.
2. Press C once so the city code is flashing on the display.
3. Use D(east) and B(west) to select the city code you
want to use as your Home City.
• The following are the city codes for major cities in
North America.
LAX (P (Pacific) indicator):
Los Angeles, San Francisco, Las Vegas, Seattle,
Vancouver, Tijuana
DEN (M (Mountain) indicator):
Denver, El Paso, Edmonton, Culiacan
CHI (C (Central) indicator):
Chicago, Houston, Dallas/Fort Worth, New Orleans,
Winnipeg, Mexico City
(E (Eastern) indicator):
NYC
New York, Detroit, Miami, Boston, Montreal
• 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.
About This Manual
(Light)
Module 2639
(Light)
Module 2819
Some
functions
disabled
Time Recorder Mode
Stopwatch Mode
• Note that this watch does not have a city code that corresponds to Newfoundland.
4. Press A twice to exit the setting screen.
• The first press of A displays the 12/24-hour setting screen. Pressing A again exits
the setting screen.
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.
• If you are in an area that does not use Daylight Saving Time (summer time), 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 automatically picks up the time calibration signal four
times a day at 2:00 a.m., 3:00 a.m., 4:00 a.m., and 5:00 a.m. 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!
• 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.
Resin Band
• The watch should not be on its side or facing the wrong way.
• The operational procedures for Modules 2639 and 2819
are identical. All of the illustrations in this manual show
Module 2819.
• 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.
Alarm Mode
Metal Band
1