Casio 3779 User manual

Operation Guide 3779 4306
1
MO0507-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 and keep it on hand for later reference
when necessary.
Before using the watch for the first time...
Some watches are sent from the factory with the second
hand stopped at 12 o’clock. Press the Bbutton to start
the second hand.
About This Manual
•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.
Hour hand
Minute hand
Second hand
Press A.
▲
Timekeeping Mode Receive Result Mode Home Position
Adjustment Mode
▲
▲
▲
Press B.
Hold down Aand B
for about five seconds.
Manual Setting Screen
Press B.
▲
Hold down Bfor about five
seconds, then press Btwice.
▲
General Guide
•This watch is designed so the function of a button is executed when you release the
button, not when you press it.
•Use Aand Bto change from mode to mode as shown below.
Radio-controlled Timekeeping
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 Germany
(Mainflingen), England (Rugby), and the United States (Fort Colllins).
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 when necessary.
•The first thing you should do after purchasing this watch is to specify your Home
Time Zone, which is the time zone where you normally will use the watch. For more
information, see “To specify your Home Time Zone”below.
•When using the watch outside the range of 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.
To specify your Home Time Zone
1. In the Timekeeping Mode, hold down Bfor about five
seconds until the second hand moves to the hour
marker that corresponds to the currently selected time
zone (see below) and stops. This is the setting mode.
•The GMT differential indicates the time difference in
hours between Greenwich Mean Time and the
applicable time zone, as described in the table below.
2. Press Ato move the second hand to the hour marker
for the time zone you want to select as your Home Time
Zone.
London (GMT+0)*1 12 o’clock
Move the second hand to here:To select this time zone:
Paris, Berlin, Milan, Rome, Amsterdam,
Hamburg, Frankfurt, Vienna, Barcelona,
Madrid (GMT +1)*1
9 o’clock
2 o’clock
Tokyo, Seoul, Pyongyang (GMT +9)
Athens (GMT +2)*1
1 o’clock
*1 Also enables reception of European time calibration signals (Germany and U.K.)
*2 Also enables reception of North American time calibration signal.
3. Press Bthree times to exit the setting mode.
•The watch will also return to the Timekeeping Mode if you do not perform any
operation for about three minutes.
•Normally, your watch should show the correct time as soon as you exit the Home
Time Zone setting screen. 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.
New York, Detroit, Miami, Boston (GMT –5)*2
Chicago, Houston, Dallas/Fort Worth, New
Orleans (GMT –6)*2
Denver, El Paso, Culiacan (GMT –7) *2
Los Angeles, San Francisco, Las Vegas,
Seattle/Tacoma, Tijuana (GMT –8) *2
None (auto receive disabled)
5 o’clock
6 o’clock
7 o’clock
8 o’clock
11 o'clock
•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 “Adjusting the Home Positions”to check the home positions of the
hands, and make adjustments as required.
•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 time zones (GMT differential values) and
transmitters, see “Transmitters”.
•See the maps under “Reception Ranges”for information about the reception ranges
of the watch.
•You can disable time signal reception, if you want. See “To turn off time calibration
signal reception”for more information.
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
five 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!
•When getting ready to receive the time calibration signal, position the watch as
shown in the nearby illustration, with its 6 o’clock side facing towards a window.
Make sure there are no metal objects nearby.
6 o’clock
•The watch should not be facing the wrong way.
•Proper signal reception can be difficult or even impossible under the conditions listed
below.
•Signal reception is normally better at night than during the day.
•Time calibration signal reception takes from two to seven minutes, but in some
cases it can take as long as 10 minutes. Take care that you do not perform any
button operations or move the watch during this time.
Inside or
among
buildings
Inside a
vehicle
Near a
construction
site, airport, or
other sources
of electrical
noise
Near high-
tension
power lines
Among or
behind
mountains
Near
household
appliances,
office
equipment,
or a mobile
phone
•In Europe, this watch can receive either the Germany (Mainflingen) or England
(Rugby) time calibration signal. See “Transmitters”for more information.
Reception Ranges
Rugby
Mainflingen
1,500 kilometers
500 kilometers
Fort Collins
Approximately
3,000 kilometers
(2,000 miles)
Approximately
900 kilometers
(600 miles)
•Under good conditions, the signal reception range is approximately 1,500 km (930
miles) from the German or U.K. transmitter, and approximately 3,000 km (2,000
miles) from the U.S. transmitter.
•At distances greater than 500 km (310 miles) from the German or U.K. transmitter,
and approximately 900 km (600 miles) from the U.S. transmitter, signal reception
may not be possible at certain times of the day and during certain periods of the
year. Radio interference may also cause problems with reception.
•See the information under “Signal Reception Troubleshooting”if you experience
problems with time calibration signal reception.

Operation Guide 3779 4306
2
About Auto Receive
With auto receive, the watch receives the time calibration signal automatically up to
five times a day. When any auto receive is successful, the remaining auto receive
operations are not performed. The reception schedule (calibration times) depends on
your currently selected Home Time Zone, and whether standard time or Daylight
Saving Time is selected for your Home Time Zone.
Your Home Time Zone Auto Receive Start Times
12345
GMT +0 Standard Time 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am
Daylight Saving Time 2:00 am 3:00 am 4:00 am 5:00 am Midnight
GMT +1 Standard Time 2:00 am 3:00 am 4:00 am 5:00 am Midnight
Daylight Saving Time 3:00 am 4:00 am 5:00 am Midnight 1:00 am
next day
GMT +2 Standard Time 3:00 am 4:00 am 5:00 am Midnight 1:00 am
next day
Daylight Saving Time 4:00 am 5:00 am Midnight 1:00 am 2:00 am
next day next day
GMT –5, Standard Time and Midnight 1:00 am 2:00 am 3:00 am 4:00 am
–6, Daylight Saving Time
–7,
–8
Note
•When a calibration time is reached, the watch will automatically receive the
calibration signal only if it is in either the Timekeeping Mode or Receive Result
Mode. Auto receive is not performed if a calibration time is reached while you are
configuring settings.
•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 receive the signal easily.
•The watch receives the calibration signal for two to seven minutes everyday when
the time in the Timekeeping Mode reaches each of the calibration times. Do not
perform any button operation within seven minutes before or after any one of the
calibration times. Doing so can interfere with correct calibration.
•Remember that reception of the calibration signal depends on the current time in the
Timekeeping Mode. The receive operation will be performed whenever the display
shows any one of the calibration times, regardless of whether or not the displayed
time is actually the correct time.
To turn off time calibration signal reception
1. In the Timekeeping Mode, hold down Bfor about five
seconds until the second hand moves to the currently
selected time zone and stops. This is the setting mode.
2. Press Aa many times as required to move the second
hand to 11 o’clock.
•Time calibration signal reception is turned off when
the second hand is pointing to 11 o’clock.
3. Press Bthree times to exit the setting mode.
•If you turn off signal reception and then select a home
time zone that supports signal reception again, be sure
to perform a manual receive operation to adjust the time
setting.
To perform manual receive
1. Place the watch on a stable surface so its 6 o’clock side
is facing towards a window.
2. In the Timekeeping Mode, hold down Afor about two
seconds until the second hand moves to the area along
the bottom of the face marked “•”(33 seconds).
•This will start manual calibration signal reception.
3. The second hand indicates one of the following
conditions described below during signal reception.
•The hour and minute hands continue to keep time
normally.
Start of Signal
Reception
“•”area (33 seconds)
“•••”area (38 seconds)
Getting ready
to receive
Receiving
It means this:If the second hand is pointing here:
•Time calibration signal reception takes from two to seven minutes, but in some
cases it can take up to 10 minutes. Take care that you do not perform any button
operations or move the watch during this time.
•The watch will enter the Receive Result Mode automatically after signal reception is
complete.
•To interrupt a receive operation and return to the Timekeeping Mode, press A.
Viewing the Latest Signal Reception Results
You can use the Receive Result Mode to check if signal reception was performed
correctly.
To check the latest signal reception results
Enter the Receive Result Mode.
•The watch will enter the Receive Result Mode
automatically after you perform a manual receive
operation.
•The position of the second hand indicates the result of
the latest receive operation, as shown below.
“Y”area (22 seconds) : Receive successful
“N”area (27 seconds) : Receive failed
•The hour and minute hands continue to keep time normally in the Receive Result Mode.
•The watch will not enter the Receive Result Mode when you press Aif calibration
signal reception is turned off.
•To return to the Timekeeping Mode, press A.
•Manually changing the hour and minute hand setting clears the current receive
result. This is indicated by the second hand pointing to the “N”area (27 seconds).
•The second hand will point to the “N”area (27 seconds) if the last receive operation
was interrupted for some reason.
Signal Reception Troubleshooting
Check the following points whenever you experience problems with signal reception.
•The watch is not in the Timekeeping
Mode or Receive Result Mode.
•Signal reception is turned off.
•You changed the time setting
manually.
•
You were adjusting the watch settings
when the auto receive start times
were reached.
• You pressed A while signal receive
was in progress.
Cannot
perform
manual
receive.
The second
hand is
pointing to
the “N”area
(
27 seconds ).
•Enter the Timekeeping Mode
or Receive Result Mode and
try again.
•Select a time zone that
enables calibration signal
reception.
•Perform manual signal
receive or wait until the next
auto signal receive operation
is performed.
•Check to make sure the
watch is in a location where it
can receive the signal.
What you should doProblem Probable Cause
Time setting
is incorrect
following
signal
reception.
•The Home Time Zone setting is not
correct for the area where you are
using the watch.
•The home position of the hands is
off.
•Select the correct Home
Time Zone.
•Enter the Home Position
Adjustment Mode and adjust
the home position.
•For further information, see “Important!”under “Time Calibration Signal Reception”
and “Radio-controlled Timekeeping Precautions”.
Adjusting the Home Positions
If the time settings are wrong even after the time calibration signal is received
normally, use the following procedure to adjust their home positions.
To adjust the home positions
1. Enter the Home Position Adjustment Mode.
•If the home position of the second hand is currently
correct, it will move to the 12 o’clock position.
•The analog hands do not keep time during home
position adjustment.
2. Check the position of the second hand.
•The second hand home position is correct if it is
pointing at 12 o’clock.
•If the second hand is not pointing at 12 o’clock, it
means that its home position is off. If this happens,
press Ato move the second hand clockwise in one-
second steps, until it points at 12 o’clock.
12 o’clock
Correct second hand
home position 3. Press Bto advance to hour and minute hand home
position adjustment.
•If current hour and minute hand alignment is correct,
they will both move to 12 o’clock.
4. Check the position of the hour and minute hands.
•If the hour and minute hands are not pointing at 12
o’clock, it means that their home position is off. If this
happens, press Ato move the hour and minute
hands clockwise in 20-second steps, until they point
at 12 o’clock.
5. Press Bto exit home position adjustment.
•This will cause the watch to return to the Timekeeping
Mode. The hour, minute, and second hands will indicate
the current time.
Correct hour
and minute hand
home position
12 o’clock
Timekeeping
Use the Timekeeping Mode to set and view the current
time. This section also explains how to set the current time
manually.
•If you become confused and lose your way during the
following procedures, simply put the watch down and do
not perform any button operation for about three
minutes. This will cause the watch to enter the
Timekeeping Mode (indicated by normal one-second
movement of the second hand) automatically. After that,
you can try performing the manual setting procedure
again from the beginning.
Hour hand Minute hand
Second hand
Setting the Time
You can use the Timekeeping Mode to change the hand setting and to switch between
Standard Time and Daylight Saving Time.
•You can also change the Home Time Zone setting in the Timekeeping Mode.
To change the time setting
1. In the Timekeeping Mode, hold down Bfor about five
seconds until the second hand moves to the currently
selected time zone and stops. This is the setting mode.
2. Press Btwice.
•This will cause the second hand to the 8-second
position.
3.
Press A to move the time setting forward by one minute.
•Holding down Afor about two seconds starts high-
speed hand movement. High-speed hand movement
will continue until the hands complete a 12-hour cycle,
or until you stop them by pressing A.
4. Coordinating with a time signal on the radio or TV, press Bto restart normal
timekeeping. The second hand will move to 12 o’clock at the start of timekeeping.
•If you did not change any of the time settings (hour, minute), pressing Bwill cause
the second hand to move to the seconds for the current time and resume
timekeeping from there.
•If you manually change the time setting between midnight and noon, the watch will
perform auto receive starting from noon. After that, auto receive will be performed at
the normal times (starting from midnight) each day. If you manually change the time
setting between noon and midnight, the watch will start performing normal auto
receive starting from midnight.

Operation Guide 3779 4306
3
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.
The time calibration signal includes both Standard Time and Daylight Saving Time
data. If you select AUTO for the DST setting, the watch will switch between Standard
Time and Daylight Saving time automatically as required.
•Changing the Home Time Zone (GMT differential) setting to anything besides 9
o’clock (GMT +9) or 11 o’clock (receive off) will change the DST setting to AUTO.
Selecting 9 o’clock (GMT +9) or 11 o’clock (receive off) will change the DST setting
to OFF. See “To specify your Home Time Zone”for details about time zones.
To switch between Daylight Saving Time and Standard Time
1. In the Timekeeping Mode, hold down Bfor about five
seconds until the second hand moves to the currently
selected time zone and stops. This is the setting mode.
2. Press Bonce.
•This will cause the second hand to move to the 47,
52, or 57 seconds position. The hand position
indicates the current DST setting.
3. Press Ato cycle through the DST settings.
•The following shows how the second hand indicates
the DST settings.
47 seconds ................................................... OFF
52 seconds ................................................... AUTO
57 seconds ................................................... DST ON
4. When the setting is the way you want, press Btwice to
exit the setting mode.
Reference
This section contains more detailed and technical information about watch operation.
It also contains important precautions and notes about the various features and
functions of this watch.
Back Cover
The back cover of the watch is marked with the relative positions of each time zone
city code. The position of “LAX”on the back of the watch, for example, indicates that
the “LAX”(Los Angeles) city code is located at 8 o'clock on the face of the watch.
Auto Return Features
The watch will return to the Timekeeping Mode automatically if you do not perform any
operation for about three minutes while it is in the Receive Result Mode, the Home
Position Adjustment Mode, or a setting mode.
Button Operation Timing
This watch is designed so the function of a button is executed when you release the
button, not when you press it.
Scrolling
•The Abutton is used to change the hand setting in various setting modes. In most
cases, holding down the Abutton will start high-speed movement of the applicable
hand(s).
•High-speed movement of the hands will continue until it completes a 12-hour cycle,
or until you press Ato stop it.
Radio-controlled Timekeeping Precautions
•Strong electrostatic charge can result in the wrong time being set.
•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.
•The time calibration signal bounces off the ionosphere. Because of this, such factors
as changes in the reflectivity of the ionosphere, as well as movement of the
ionosphere to higher altitudes due to seasonal atmospheric changes or the time of
day may change the reception range of the signal and make reception temporarily
impossible.
•Even if the time calibration signal is received properly, certain conditions can cause
the time setting to be off by up to one second.
•The current time setting in accordance with the time calibration signal takes priority
over any time settings you make manually.
•If you are in an area where proper time calibration signal reception is impossible, the
watch keeps time within ±20 seconds a month at normal temperature.
•If you have problems with proper time calibration signal reception or if the time
setting is wrong after signal reception, check your Home Time Zone (GMT
differential) setting.
The following are the initial factory defaults for this setting.
Module 3779: GMT +1
Module 4306: GMT +0
•To find out the module number of your watch, look at its
back cover. The Module number (3779 or 4306) is
engraved inside the box on the back cover.
3779
In this case:
The first signal search
operation after the Home Time
Zone has been changed
The second and subsequent
signal searches
The watch does this:
1. Checks the Mainflingen signal first.
2. If the Mainflingen signal cannot be received,
checks the Rugby signal.
1. Checks the signal of the transmitter of the first
receive operation (Rugby or Mainflingen).
2. If the checked signal cannot be received, checks
the other signal.
Transmitters
The time calibration signal received by this watch depends on the currently selected
home time zone.
•When a U.S. time zone is selected, the watch receives the time calibration signal
transmitted from the United States (Fort Collins).
•When a European time zone is selected, the watch receives the time calibration
signals transmitted from Germany (Mainflingen) and England (Rugby). The following
tables show the reception priority for the European signals.
The watch does this:
1. Checks the Rugby signal first.
2. If the Rugby signal cannot be received, checks
the Mainflingen signal.
1. Checks the signal of the transmitter of the first
receive operation (Rugby or Mainflingen).
2. If the checked signal cannot be received, checks
the other signal.
In this case:
The first signal search
operation after the Home Time
Zone has been changed
The second and subsequent
signal searches
When time zone GMT+0 is selected:
Timekeeping
•The current time for all time zones in the Timekeeping Mode is calculated in
accordance with the Greenwich Mean Time (GMT) differential of each zone, based
on your Home Time Zone time setting.
•
GMT differential is calculated by this watch based on Universal Time Coordinated (UTC*) data.
* UTC is the world-wide scientific standard of timekeeping. It is based upon carefully
maintained atomic (cesium) clocks that keep time accurately to within
microseconds. Leap seconds are added or subtracted as necessary to keep UTC in
sync with the Earth’s rotation. The reference point for UTC is Greenwich, England.
When time zone GMT+1 or GMT+2 is selected: