Casio WVA-300D Service Manual & Parts List page 5

Auto Summer Time (DST) Switching
The time calibration signal transmitted from Mainflingen, Germany includes
both standard time and summer time (Daylight Saving Time or DST) data.
Because of this, the watch automatically switches between standard time and
summer time (DST) automatically whenever BER, LON, PAR, CAI, or JRS is
selected as the Home City code.
·
Daylight Saving Time (DST) advances the time setting by one hour from
Standard Time. Remember that not all countries or even local areas use
Daylight Saving Time.
Auto Summer Time (DST) Default Settings
The following shows the default settings for each of the Home City codes that
support auto summer time (DST) switching.
Home City Code Auto Summer Time Default Setting
BER, LON, PAR AUTO
CAI, JRS
The following flows show how to switch the auto summer time setting between
AUTO, ON, and OFF.
·
The following are the meanings of the AUTO, ON, and OFF indicators.
AUTO - Watch will switch between standard time and summer time (DST)
automatically.
ON - Summer time (DST)
OFF - Standard time (summer time turned off)
·
See information about configuring summer time (DST) settings.
When BER is the Home City Code
Press D.
AUTO (Default)
When LON, PAR, CAI, or JRS is the Home City Code
Press D.
OFF (Default for
AUTO (Default for
CAI and JRS)
LON and PAR)
To perform manual time calibration signal reception
1. Place the watch on a stable surface to its top (12
o'clock side) is facing in the general direction of
Frankfurt, Germany.
·
Position the watch so the case is pointing
upwards as shown in the nearby illustration. This
puts the watch in the optimum position for time
calibration signal reception.
·
Note that signal reception is poor if the watch is
on its back or side.
Receive indicator
2. In the Timekeeping Mode, hold down D for about
two seconds, until the watch beeps and the current
time is flashing on the display.
·
This indicates that signal reception has started.
·
Time calibration signal reception takes from four
to 11 minutes. Take care that you do not move the
watch during this time.
Current time
·
After signal reception is complete, the display of the watch changes to the
Last Signal screen, which shows the new signal receive date and time.
·
The receive indicator ( ) indicates that the calibration time reception
attempt was successful.
Note
·
To interrupt a receive operation and return to the Timekeeping Mode (Date or
Time screen), press D.
·
If the receive operation is unsuccessful, the message ERR appears on the
Last Signal screen for about one or two minutes. After that, the watch returns
to the Timekeeping Mode (Date or Time screen).
·
You can also change from the Last Signal screen to the Timekeeping Mode
(Date or Time screen) by pressing D.
About the Receive Indicator
The receive indicator shows the strength of the calibration signal being received.
Weak
For best reception, be sure to keep the watch in a location where signal strength is
strongest.
·
Even in an area where signal strength is strong, it takes about 10 seconds for
signal reception to stabilize enough for the receive indicator to indicate signal
strength.
·
Use the receive indicator as a guide for checking signal strength and for
finding the best location for the watch during signal receive operations.
·
The receive indicator remains on the display in all modes following reception
of the time calibration signal and calibration of the watch's time setting. The
receive indicator does not appear if signal reception was unsuccessful or
after manual adjustment of the current time setting.
OFF
After receipt of the time calibration
signal turns summer time OFF.
After receipt of the time calibration
signal turns summer time ON.
Press B.
Press Bor D.
ON
Strong
— 3 —
About Auto Receive
When auto receive is turned on, the watch automatically starts to receive the
time calibration signal when the digital time in the Timekeeping Mode reaches
2:00 AM, and 4:00 AM each day (calibration times).
Note
·
The Auto Receive operation is performed only if the watch is in the
Timekeeping Mode when one of the calibration times is reached. It is not
performed if the calibration time is reached while you are making 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 digital 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.
·
The receive indicator ( ) indicates that one or both of the last calibration
time reception attempts were successful. If you do not see the receive
indicator, it means there was some problem with the last calibration reception
operation. Either perform reception manually, or make sure the watch is set
up properly to receive the time calibration signal for the next automatic
reception time.
·
Even if the calibration reception is successful, the receive indicator
disappears every day at 3am.
·
When auto receive is turned on, the watch receives the calibration signal for
four to 11 minutes each day when the digital time reaches 2:00 AM, and 4:00
AM. Do not operate any of the watch's buttons within 15 minutes prior to or
following the calibration times. Doing so can interfere with correct calibration.
·
Remember that reception of the calibration signal depends on the time shown
on the digital display. The receive operation will be performed whenever the
digital display shows 2:00 AM, and 4:00 AM, regardless of whether or not the
displayed time is actually the correct time.
·
When two 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.
To turn auto receive on and off
1. In the Timekeeping Mode, hold down A until the
current Auto Receive On/Off setting (the receive
indicator) starts to flash, which indicates the setting
screen.
2. Press D to toggle Auto Receive on (ON) and off
(OFF).
3. Press A to exit the setting screen.
Analog Timekeeping
The analog time of this watch is synchronized with the digital time. The analog
time setting is adjusted automatically whenever you change the digital time.
Note
·
Whenever you manually change the digital time setting or Home City code, or
if the time is adjusted by receipt of a time calibration signal, the hands of the
analog timepiece move clockwise or counter clockwise to adjust to the new
setting. If the analog time does not match the digital time for any reason, use
the procedure described under "To adjust the analog time" to match the
analog setting to the digital setting.
·
Whenever you need to adjust both the digital and the analog time settings
manually, make sure you adjust the digital setting first.
·
Depending on how much the hands have to move in order to adjust to the
digital time, it may take some time before the analog hands stop moving.
·
The analog time does not change while a signal receipt operation is in
progress. After the receive operation is complete, the analog time is
automatically adjusted to match the digital time.
·
If a signal receive operation is performed while the analog time and digital
time do not match, the digital time will be adjusted correctly but the analog
time may not be adjusted. If this happens, perform the steps below to adjust
the analog time.
To adjust the analog time
1. In the Timekeeping Mode, press C five times to
Current time enter the Hand Setting Mode.
2. Hold down A until the current digital time starts to
flash, which indicates the setting screen.
·
Note that you will not be able to change to the
setting screen if the analog hands are moving
because the watch is automatically adjusting the
analog time to match the digital time. If this
happens, wait until the hands stop moving.
3. Use D (+) and B (–) to adjust the analog setting
as described below.
When you want to do this: Perform this button operation:
·
Press D.
Move the hand setting
forward 20 seconds