Casio 3721 Operation Manual Download Page 5

Operation Guide 3721

5

To manually set the hour and minute

1.

In the Timekeeping Mode,
hold down the 

A

A

A

A

A

 button

for about five seconds
until the second hand
stops at AM or PM.

Note that the hands of the
watch do not move in the
manual setting mode.

If you do not perform any
button operation for about two
or three minutes, the watch
will exit the manual setting
mode and normal hand
movement will resume.

Pressing the 

A

 button and the 

B

 button at the same time in

the manual setting mode will cause the hands to move to the
original (unadjusted) time setting. Then the watch will return to
the Timekeeping Mode.

2.

Use one of the operations described below set the hands.

To move the hands clockwise

 Advance to step 2-a.

To move the hands counterclockwise

Advance to step 2-b.

When adjusting the hour and minute hands, make sure you
set a.m. and p.m. times correctly.

Whenever the time setting passes 12 o’clock, the second
hand will switch between AM and PM.

AM

Example: Current time is 

10:09 a.m. 

 2-a

To set the alarm time by moving the hands
clockwise

Press the 

B

B

B

B

B

 button to move

the hands clockwise by one
minute.

Holding down the 

B

 button for

about two seconds moves the
hands clockwise at high speed.
High-speed movement of the
hands will continue until it
completes a 12-hour cycle, or
until you press any button to stop
it.

After setting the time you want, press the 

A

 button to advance to

step 3.

 2-b

To set the alarm time by moving the hands
counterclockwise

Press the 

A

A

A

A

A

 button.

This will cause the minute hand
to move counterclockwise about
one or two minutes, and then
stop around 12 o’clock.

Press the 

B

B

B

B

B

 button to move

the hands counterclockwise
by one minute.

Holding down the 

B

 button for about two seconds moves the

hands counterclockwise at high speed. High-speed movement of
the hands will continue until it completes a 12-hour cycle, or until
you press any button to stop it.

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 two or 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.

To manually reset the second hand to
the top of the minute

1.

In the Timekeeping Mode,
hold down the 

A

A

A

A

A

 button

for about five seconds
until the second hand
stops at AM or PM.

If you do not perform any
button operation for about two
or three minutes, the watch
will exit the manual setting
mode and normal hand
movement will resume.

2.

Press the 

A

A

A

A

A

 button twice.

This will cause the second
hand to move to SEC.

Note that the hands of the
watch do not move in the
manual setting mode.

3.

In accordance with a time
signal on the TV or radio,
press the 

B

B

B

B

B

 button.

This will increase the minute
setting by one and restart the
seconds count from 00.

In Japan, you can obtain the
current time by dialing 117 on
the telephone.

AM

Example: Current time is 

10:08 a.m. 

SEC

Adjusting the Time Manually

You can perform the following procedures to adjust
the time and date when the watch is unable to
receive a time calibration signal for some reason.

3.

Press the 

B

B

B

B

B

 button to

advance the date by one.

If the watch automatically
skips the end of the month
date (30 or 31) you are trying
to set, first perform the steps
below to change the month
setting and then come back to
adjust the date setting.

4.

Press the 

A

A

A

A

A

 button.

The second hand will move to
the current month setting.

Jan

Feb

Mar

Sep

Aug

Jul

Apr

Jun

May

Nov

Dec

Oct

Date

Current month

10’s digit of year setting

3.

To return to the
Timekeeping Mode, press
the 

A

A

A

A

A

 button six times.

This will cause the hands t

ο

move to the current time, and
resume normal movement.

To adjust the date

1.

In the Timekeeping Mode,
hold down the 

A

A

A

A

A

 button

for about five seconds
until the second hand
stops at AM or PM.

Note that the hands of the
watch do not move in the
manual setting mode.

If you do not perform any
button operation for about two
or three minutes, the watch
will exit the manual setting
mode and normal hand
movement will resume.

2.

Press the 

A

A

A

A

A

 button three

times.

The second hand will move to
12 o’clock.

AM

Example: Current time is 

10:09 a.m. 

12 o’clock

5.

Press the 

B

B

B

B

B

 button to

advance the month by
one.

6.

Press the 

A

A

A

A

A

 button.

The second hand will move to
the ten’s digit of the year
setting.

10

20

30

90

80

70

40

60

50

00

Summary of Contents for 3721

Page 1: ...n an Overcast Day 5 000 lux Indoor Fluorescent Lighting 500 lux Approximate Exposure Time Timekeeping Restored Full Charge 1 hour 2 hours 3 hours 30 hours 12 hours 61 hours Note that the above charging times are for reference only Actual charging time depends on a variety of environmental factors The power supply of this watch uses a solar cell to generate electrical power which is stored by a rec...

Page 2: ...only when it is dark The auto light switch does not illuminate the face when surrounding light is bright The auto light switch will illuminate the face for about 1 5 seconds in any mode To turn the auto light switch on and off In the Receive Result Mode hold down the A button for about three seconds to toggle the auto light switch on and off Face Illumination Location Reception is difficult and ma...

Page 3: ...keeping Mode hold down the B B B B B button for about two seconds The watch will beep and signal reception will start To interrupt reception Press any button When reception starts The second hand moves to READY The hour and minute hands continue to keep time normally During reception The second hand moves to WORK The hour and minute hands continue to keep time normally Do not move the watch until ...

Page 4: ...hour and minute hand home position is off 9 Use the following steps to move the hands counterclockwise Press the B button to align the hour and minute hands with 12 o clock Each press of the B button moves the hand setting 10 seconds Holding down the B button for about two seconds moves the hands at high speed High speed movement of the hands will continue until it completes a 12 hour cycle or unt...

Page 5: ...second movement of the second hand automatically After that you can try performing the manual setting procedure again from the beginning To manually reset the second hand to the top of the minute 1 In the Timekeeping Mode hold down the A A A A A button for about five seconds until the second hand stops at AM or PM If you do not perform any button operation for about two or three minutes the watch ...

Page 6: ...l cause the second hand to stop moving whenever the watch is left in the dark Note that hand movement may stop if the watch is blocked from light by your sleeve Power Saving How the sleep state works Sleep Level 1 The second hand stops whenever the watch is left in the dark for about one hour between the hours of 10 00 p m and 6 00 a m The hour and minute hand and the date continue to operate norm...

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