Casio Watch 5235 Users Manual QW 5235OC

5235 to the manual 950c9527-410d-4d81-bb57-5c9e2a255aaa

2015-01-21

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MA1201-EB

Operation Guide 5235 (OC)
ENGLISH
Congratulations upon your selection of this CASIO watch.

x Note that the product illustrations in this manual are intended for reference only, and so the actual
product may appear somewhat different than depicted by an illustration.
This watch does not have a city code that corresponds to the UTC offset of –3.5 hours. Because of
this, the radio-controlled atomic timekeeping function will not display the correct time for Newfoundland,
Canada.
Note that CASIO COMPUTER CO., LTD. assumes no responsibility for any damage or loss suffered by
you or any third party arising through the use of this product or its malfunction.

E-1

Things to check before using the watch

About This Manual
B

Operations are performed using the watch’s crown, and the two buttons
indicated by the letters A and B in this manual.

@ +

1. Observe the movement of the x Second Hand.
Is the x Second Hand moving smoothly at one-second intervals?

Hand Functions

z
x
c
v

Hour Hand
Second Hand
Minute Hand
Day Indicator

Is the x Second Hand moving at two-second intervals
or is it stopped completely?
YES

This User’s Guide uses numbers shown above to identify watch hands and
indicators.

Power is low. Charge the watch by placing it in a
location where it is exposed to light. For details, see
“Charging the Watch” (page E-7).

About the crown
Some of the operations of this watch are performed by pulling out the crown, while other operations are
performed by pushing the crown in.
x Button operations may become disabled after you perform a crown operation. If this happens, rotate
the crown slightly. This should restore button operations.
Important!
x The A button is designed to protect against accidental pressing. Use a thin pointed
object to press the depression of the button to operate it.
x In the illustrations in this manual, the A button is emphasized for ease of
understanding.

YES
The watch is charged. For details about
charging, see “Charging the Watch”
(page E-7).
NEXT
Go to step 2.

2. Check the Home City.
Use the procedure under “To conﬁgure Home City settings” (page E-19) to conﬁgure your Home City.
Important!
Proper time calibration signal reception depends on correct Home City, time, and date settings. Make
sure you conﬁgure these settings correctly.

E-3

E-2

3. Set the current time.
x To set the time using a time calibration signal
See “To get ready for a receive operation” (page E-13).
x To set the time manually
See “Conﬁguring Current Time and Date Settings Manually” (page E-23).
The watch is now ready for use.
x For details about the watch’s radio controlled timekeeping feature, see “Radio Controlled Atomic
Timekeeping” (page E-11).

Contents
E-2

About This Manual

E-3

Things to check before using the watch

E-7

Charging the Watch
E-10 To recover from the sleep state

E-11 Radio Controlled Atomic Timekeeping
E-13 To get ready for a receive operation
E-15 To perform manual receive
E-16 To check the result of the latest receive operation
E-16 To turn auto receive on and off
E-18 Function and Button Operation Guide
E-19 Configuring Home City Settings
E-19 To conﬁgure Home City settings
E-21 To switch between standard time and summer time manually
E-23 Configuring Current Time and Date Settings Manually
E-23 To change the current time setting manually
E-25 To change the current date setting manually
E-27 Adjusting Home Positions
E-28 To adjust home positions manually

E-4

E-5

E-30 Troubleshooting

Charging the Watch

E-34 Specifications

The face of the watch is a solar panel that generates power from light. The generated power charges a
built-in rechargeable battery, which powers watch operations. The watch charges whenever it is exposed
to light.

Charging Guide
Whenever you are not
wearing the watch, be sure
to leave it in a location where
it is exposed to light.
x Best charging
performance is achieved
by exposing the watch to
light that is as strong as
possible.

When wearing the watch, makes
sure that its face is not blocked
from light by the sleeve of your
clothing.
x The watch may enter a sleep
state (page E-10) if its face is
blocked by your sleeve even
only partially.

Warning!
Leaving the watch in bright light for charging can cause it to become quite hot. Take care when
handling the watch to avoid burn injury. The watch can become particularly hot when exposed to
the following conditions for long periods.
x On the dashboard of a car parked in direct sunlight
x Too close to an incandescent lamp
x Under direct sunlight

E-6

E-7

Operation Guide 5235 (OC)
Important!
x Keep the watch in an area normally exposed to bright light when storing it for long periods. This helps
to ensure that power does not run down.
x Storing the watch for long periods in an area where there is no light or wearing it in such a way that it is
blocked from exposure to light can cause power to run down. Make sure that the watch is exposed to
bright light whenever possible.

Power Recovery Mode
The watch is designed to go into a power recovery mode that stops hand operation temporarily whenever
power suddenly drops below a certain level due to continuous signal reception or other operations over a
short period. Note that all operations are disabled while the watch is in the power recovery mode.
The hands will move to the correct positions and the watch will resume normal operation after power
recovers (in about 15 minutes). Putting the watch in a location where it is exposed to light will help power
to recover sooner.

Power Levels
B

You can get an idea of the watch’s power level by observing the movement of
the x Second Hand.
x If the x Second Hand is moving normally at one-second intervals, power is
at Level 1.
x If the x Second Hand is moving at two-second intervals, power is at Level 2,
which is quite low. Expose the watch to light as soon as possible so it can
charge (Low battery alert).
Level
1

Moves at two-second
intervals.

Hand Movement
Normal.
x Second Hand moves at two-second intervals.
v Day Indicator changes to 1 (home position).

Function Status
All functions enabled
Time calibration signal
reception disabled

x Second Hand stopped.
z Hour Hand and c Minute Hand stopped at
12 o’clock.

All functions disabled

Charging Times
Level Change *2
Daily
Operation *1

Exposure Level (Brightness)

Level 3

Level 2

Level 1

Outdoor sunlight (50,000 lux)

8 minutes

3 hours

30 hours

Window sunlight (10,000 lux)

30 minutes

7 hours

111 hours

Window sunlight on cloudy day (5,000 lux)

48 minutes

11 hours

178 hours

8 hours

120 hours

–––

Indoor ﬂuorescent lighting (500 lux)

* 1 Approximate exposure each day to generate power for normal daily operation.
* 2 Approximate exposure to take power up one level.
x The above times are for reference only. Actual times depend on lighting conditions.
x For details about the operating time and daily operating conditions, see the “Power Supply” section of
the Speciﬁcations (page E-34).

x When power drops to Level 3, all settings (including timekeeping) will be cleared. Recharging the
battery will reset all settings to their initial factory defaults.
E-8

E-9

Power Saving

Radio Controlled Atomic Timekeeping

Power Saving enters a sleep state automatically whenever the watch is left for a certain period in an area
where it is dark. The table below shows how watch functions are affected by Power Saving.
x There actually are two sleep state levels: “second hand sleep” and “function sleep”.
Elapsed Time in Dark

Operation

60 to 70 minutes (second hand sleep)

x Second Hand only stopped at 12 o’clock, all other functions enabled

6 or 7 days (function sleep)

x All functions, including timekeeping, disabled
x Internal timekeeping maintained

x The watch will not enter a sleep state between 6:00 AM and 9:59 PM. If the watch is already in a sleep
state when 6:00 AM arrives, however, it will remain in the sleep state.
To recover from the sleep state
Move the watch to a well-lit area or press any button.

This watch receives a time calibration signal and updates its time setting accordingly. However, when
using the watch outside of areas covered by time calibration signals, you will have to adjust the settings
manually as required. See “Configuring Current Time and Date Settings Manually” (page E-23) for more
information.
This section explains how the watch updates its time settings when the city code selected as the Home
City is in Japan, North America, Europe, or China, and is one that supports time calibration signal
reception.
If your Home City Code setting is this:

The watch can receive the signal from the transmitter
located here:

LONDON (LON), PARIS (PAR), ATHENS (ATH)

Anthorn (England), Mainﬂingen (Germany)

HONG KONG (HKG)

Shangqiu City (China)

TOKYO (TYO)

Fukushima (Japan), Fukuoka/Saga (Japan)

NEW YORK (NYC), CHICAGO (CHI),
DENVER (DEN), LOS ANGELES (LAX),
ANCHORAGE (ANC), HONOLULU (HNL)

Fort Collins, Colorado (United States)

Important!
x The areas covered by HONOLULU (HNL) and ANCHORAGE (ANC) are quite far from the calibration
signal transmitters, so certain conditions may cause reception problems.

E-10

E-11

Approximate Reception Ranges
UK and German Signals

North American Signal

Anthorn

2,000 miles
(3,000 kilometers)

500 kilometers
600 miles
(1,000 kilometers)

1,500 kilometers

Fort Collins

The Anthorn signal is receivable
within this area.

Mainﬂingen

Japanese Signals

Chinese Signal

Fukushima

500 kilometers

Changchun

500 kilometers

Beijing
Shangqiu
Shanghai
Chengdu
Hong Kong

Fukuoka/Saga

x Signal reception may not be possible at the distances noted below during certain times of the year or
day. Radio interference may also cause problems with reception.
− Mainﬂingen (Germany) or Anthorn (England) transmitters: 500 kilometers (310 miles)
− Fort Collins (United States) transmitter: 600 miles (1,000 kilometers)
− Fukushima or Fukuoka/Saga (Japan) transmitters: 500 kilometers (310 miles)
− Shangqiu (China) transmitter: 500 kilometers (310 miles)
x As of December 2010, China does not use Daylight Saving Time (DST). If China does go to the
Daylight Saving Time system in the future, some functions of this watch may no longer operate
correctly.
x Using this watch in a country covered by a time calibration signal that is different from the countries it
supports may result in incorrect time indication due to local application of summer time, etc.
To get ready for a receive operation
1. Place the watch in a location where signal reception is good.
x Position the watch as shown in the nearby illustration,
with 12 o’clock pointed towards a window. Make sure
there are no metal objects nearby.
12 o’clock
x Signal reception normally is better at night.
x The receive operation takes from two to seven minutes,
or
but in some cases it can take as long as 14 minutes.
Take care that you do not perform any button operation
or move the watch during this time.

1,500 kilometers

1,000 kilometers
E-12

E-13

x Signal reception may be difﬁcult or even impossible under the conditions described below.

To perform manual receive
1. Keep B depressed for at least two seconds as the x Second Hand goes through the following
sequence.
x Moves to YES (or Y for some models) or NO (N) to indicate the last signal reception result, then to
READY (R).
2. The x Second Hand indicates the operations the watch is currently performing.

Inside or among
buildings

Inside a vehicle

Near household
appliances,
ofﬁce
equipment, or a
mobile phone

Near a
construction
site, airport, or
other sources of
electrical noise

Near hightension power
lines

Among
or behind
mountains

2. What you should do next depends on whether you are using Auto Receive or Manual Receive.
x Auto Receive: Leave the watch over night in the location you selected in step 2. See “Auto Receive”
for details.
x Manual Receive: Perform the operation under “To perform manual receive”.
Auto Receive
x With Auto Receive, the watch performs the receive operation each day automatically up to six times
(up to ﬁve times for the Chinese calibration signal) between the hours of midnight and 5 a.m. When any
receive operation is successful, none of the other receive operations for that day are performed.
x When a calibration time is reached, the watch will perform the receive operation. The receive operation
is not performed if a calibration time is reached while you are conﬁguring settings.

E-14

When the x Second Hand is
pointed here:

It means this:

READY (R)

Watch is setting up for reception.

WORK (W)

Reception is in progress.

YES (Y)

Reception was completed successfully.

NO (N)

Reception failed for some reason.

x If signal reception is unstable, the x Second Hand may move between
WORK (W) and READY (R).
x When the receive operation is successful, the watch adjusts the time
setting accordingly, and then resumes regular timekeeping. It does not
adjust the setting if the operation failed.
Note
x To interrupt a receive operation and return to regular timekeeping, press any button.

E-15

Operation Guide 5235 (OC)
To check the result of the latest receive operation
Press B.
x The x Second Hand will move to YES (Y) if the latest receive operation
was successful, or NO (N) if it was not. After about ten seconds, regular
timekeeping will resume.
x You can return to regular timekeeping manually by pressing B while the

x Second Hand is pointing to YES (Y) or NO (N).
Note
x The x Second Hand will indicate NO (N) if you have adjusted the time or
date setting manually since the latest receive operation.

To turn auto receive on and off
1. Press B.
NO (N)

Radio-controlled Atomic Timekeeping Precautions
x Strong electrostatic charge can result in the wrong time setting.
x Even if a receive operation is successful, certain conditions can cause the time setting to be off by up
to one second.
x The watch is designed to update the date automatically for the period from January 1, 2000 to
December 31, 2099. Updating of the date by signal reception will no longer be performed starting from
January 1, 2100.
x If you are in an area where signal reception is not possible, the watch keeps time with the precision
noted in “Speciﬁcations” (page E-34).
x The receive operation is disabled under any of the following conditions.
− While power is at Level 2 or lower (page E-8)
− While the watch is in the power recovery mode (page E-9)
− While the watch is in the function sleep state (power saving, page E-10)

2. Pull out the crown.
x The x Second Hand will perform one full revolution and then stop at either
YES (Y) or NO (N) to indicate the current on/off setting.
3. Rotate the crown to move the x Second Hand to the setting you want.
x To turn on auto receive, select YES (Y).
x To turn off auto receive, select NO (N).

4. Push the crown back in to return to regular timekeeping.
@
YES (Y)
E-16

E-17

Function and Button Operation Guide

Configuring Home City Settings

Your watch can perform the following functions and button operations.
Functions:

See:

x View the current time in your Home City and in one of 29 other cities around the globe
x View the current date in the Home City
x Conﬁgure Home City and daylight saving time (DST) settings
x Perform a time calibration signal receive operation
x Conﬁgure time and date settings manually

E-19

The Home City is location where you will normally use the watch. You can choose from a selection of city
codes that represent 29 cities around the globe.
To conﬁgure Home City settings
Note
x This watch does not have a city code that corresponds to Newfoundland.

x To check the last receive result, press B once (page E-16).
x To perform manual receive, hold down B for at least two seconds (page E-15).
x To toggle between standard time and summer time, press A (page E-21).
@
TOKYO (TYO)
B

2. Rotate the crown to move the x Second Hand to the city code you want to
select as your Home City.
x Each time you select a city code, the z Hour Hand, c Minute Hand and
v Day Indicator move to the current time and date for that city code.
3. Push the crown back in to return to regular timekeeping.

E-18

1. Pull out the crown.
x This will cause the x Second Hand to move to the city code of the
currently selected Home City.
x This indicates the city code setting mode.
x If you do not perform any operation with the crown for about two minutes
after pulling it out, crown operations will become disabled and the hand
will not move if you rotate the crown. If this happens, push the crown
back in and then pull it out again.
x For details about city codes, see the “City Code Table” at the back of
this manual.

E-19

To switch between standard time and summer time manually

STD/DST Switching
You can select summer time or standard time independently for each city. The initial default setting for all
cities is AUTO.
Normally you should use the AUTO setting because it automatically switches between summer time
and standard time. You should change the setting to STD (standard time) or DST (summer time) in the
following cases.
− When using the watch in a city not included in the City Code Table
− When the switching dates in your location are different from those shown in the City Code Table

Switching between AUTO and STD (or DST)
B

A1 sec

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.
x Note that the x Second Hand always points to AUTO while UTC* is selected as your Home City.
* Coordinated Universal Time, the world-wide scientiﬁc standard of timekeeping. The reference point for
UTC is Greenwich, England.

1. Perform steps 1 and 2 under “To configure Home City settings” (page E-19).
x Selecting a city code will cause the z Hour Hand, c Minute Hand and v Day Indicator to move
automatically to the current time for the selected city code.
x If you will use the watch in a city that is not included in the city code list, select a city code that is in
the same time zone as your city.
2. Press A.
x Entering the Home City setting mode will cause the x Second Hand to move to AUTO (auto
switching), STD (standard time manual setting), or DST (summer time manual setting).
− If STD or DST is indicated, go directly to step 4 of this procedure.
− If AUTO is indicated, proceed to step 3.
E-20

E-21

Switching between STD and DST
B

Configuring Current Time and Date Settings Manually

You can configure current time and date settings manually when the watch is unable to receive a time
calibration signal.
A

3. Hold down A for about one second until the x Second Hand moves to MNL (manual), and then moves
to STD or DST.
− If STD is indicated, the watch will always show standard time.
− If DST is indicated, the watch will always show summer time.
x If you do not perform any operation for about two more seconds, the x Second Hand will return to
the Home City code. Perform step 4 below while the x Second Hand is indicating STD or DST.
4. Press A to move the x Second Hand between STD and DST.
x To switch from STD or DST to AUTO, hold down A for about one second.

@
TOKYO (TYO)
B

To change the current time setting manually
1. Pull out the crown.
x This will cause the x Second Hand to move to the city code of the
currently selected Home City.
x If you do not perform any operation with the crown for about two minutes
after pulling it out, crown operations will become disabled and the hand
will not move if you rotate the crown. If this happens, push the crown back
in and then pull it out again.
2. Change the Home City setting, if you want.
x To change the Home City setting, perform step 2 under “To conﬁgure
Home City Settings” (page E-19).
3. Hold down B for about two seconds. This will enter the time setting mode.
x The x Second Hand will indicate whether the current time is a.m. (by
moving to second 57) or p.m. (by moving to second 03).
x In the following steps, each press of B cycles between settings as shown
below.

5. After the setting is way you want, push the crown back in.

E-22

E-23

Operation Guide 5235 (OC)
Home City/DST

Hour/Minute

Hour

To change the current date setting manually
1. Pull out the crown.
@
x This will cause the x Second Hand to move to the city code of
the currently selected Home City.

Year

Month

2. Hold down B for about two seconds.
x The x Second Hand will indicate whether the current time is
a.m. (by moving to second 57) or p.m. (by moving to second
03).

Day

4. Rotate the crown to adjust the time (hour and minute) setting.
x Rotating the crown three full consecutive turns clockwise will cause the c Minute Hand to start
moving clockwise. Rotating the crown another three full consecutive turns clockwise will cause the
c Minute Hand to start moving at high speed. To stop hand movement, press any button or rotate
the crown one full turn counterclockwise.
x When adjusting the setting, check to make sure that the x Second Hand correctly indicates an a.m.
time or p.m. time.
x If you want to change the date setting at this time, press B and perform the procedure starting from
step 3 under “To change the current date setting manually” (page E-25).
5. After the settings are the way you want, push the crown back in to return to regular timekeeping.
x This causes timekeeping to resume with the x Second Hand starting from 12 o’clock.

3. Press B twice. This will enter the date setting mode.
x The v Day Indicator will move slightly to indicate the setting
mode.

>
Nov

Dec

4. Rotate the crown to adjust the date setting.
Jan

Oct

Feb

Sep

Mar

Aug

5. After the v Day Indicator stops moving, press B. This will enter
the month setting mode.
x The x Second Hand will move to the currently selected month.
6. Rotate the crown to adjust the month setting.

Apr
Jul

May
@
Jun
Setting the month

E-24

E-25

4
7

5
6
Setting the year (ones digit)
00

Adjusting Home Positions

8. Rotate the crown to adjust the year setting.
x If you want to change the time setting at this time, press B and
then perform the procedure starting from step 4 under “To change
the current time setting manually” (page E-23).

Auto correction of hand home positions corrects the hand position automatically.
x Auto correction corrects the positions of all hands. For the v Day Indicator, you must perform the
manual adjustment procedure under “To adjust home positions manually” (page E-28).

9. After the settings are the way you want, push the crown back in to
return to regular timekeeping.
x This causes timekeeping to resume with the x Second Hand
starting from 12 o’clock.

7. Press B. This will enter the year setting mode.
x The z Hour Hand will move to the number that represents the
tens digit of the year and the c Minute Hand will move to the
number that represents the ones digit. The x Second Hand will
move to 12 o’clock and stop there.

Note
x The watch’s built-in full automatic calendar makes allowances for
different month lengths and leap years. Once you set the date, there
should be no reason to change it except after you have the watch’s
rechargeable battery replaced or after power drops to Level 3.

Strong magnetism or impact can cause the hands and/or day setting to be off, even if the watch is able to
perform the signal receive operation.

Auto Home Position Adjustment

Manual Home Position Adjustment
Perform the procedure in this section if auto home position adjustment is not possible for some reason.
x Hand home position adjustment is not required if the time and day settings are correct.
Note
x Any time after you enter the home position adjustment mode in step 1 of the following procedure, you
can return to regular timekeeping by pushing the crown back in. In this case, any adjustments you
made before the watch returned to regular timekeeping will be applied.
x If you do not perform any operation with the crown for about two minutes after pulling it out, crown
operations will become disabled and hands will not move if you rotate the crown. If this happens, push
the crown back in and then pull it out again.

40
70

50
60
Setting the year (tens digit)
E-26

E-27

3. Press B.
x This enters the v Day Indicator home position adjustment mode.

To adjust home positions manually
1. Pull out the crown.
@

2. Hold down B until the x Second Hand completes the two-part movement
described below. Note that you will need to keep B depressed for at least
seven seconds.
x Part 1: About two seconds after you ﬁrst hold down B, the x Second
Hand should move to 57-second or 3-second position, if the
x Second Hand is adjusted correctly.
− If the x Second Hand does not move to 57-second or 3-second position,
it means that its home position is off and needs adjustment.
x Part 2: Next, the x Second Hand will move to 12 o’clock.
− After the x Second Hand moves to 12 o’clock, release B. When you
do, home position adjustment of all of the hands (but not the v Day
Indicator) will start automatically.
− Home position adjustment is complete when all hands are at 12 o’clock.
− To exit the home position adjustment operation and return to regular
timekeeping, push the crown back in.

E-28

Troubleshooting
Hand Movement and Position
■ The x Second Hand is moving at two-second intervals.
■ All the watch’s hands are stopped at 12 o’clock and none of the buttons work.
Power may be low. Expose the watch to light until the x Second Hand starts moving normally, at onesecond intervals (page E-8).
■ The hands of the watch suddenly start moving at high speed, even when I do not perform any
operation.
This could be due to any one of the following causes. In all cases, the hand movement does not indicate
malfunction, and should stop shortly.
x The watch is recovering from a sleep state (page E-10).
x The time setting is being adjusted following a successful auto time calibration signal receive operation
(page E-11).
■ Hands suddenly stop moving. Button operation also is disabled.
The watch may be in the power recovery mode (page E-9). Do not perform any operation until the hands
return to their normal positions (in about 15 minutes). The hands should return to their correct positions
when normal operation returns. To help power recover, leave the watch in a location where it is exposed
to light.

4. Check the v Day Indicator to confirm that it is 1, which is its home position.
x If the 1 is not in the center of the v Day Indicator, rotate the crown to
center it.
x Rotating the crown three full consecutive turns clockwise will cause the
v Day Indicator to start changing in a forward direction (increment).
x To stop v Day Indicator movement, press any button.
5. Push the crown back in to return to regular timekeeping.
x This will cause the hands to return to their normal positions and resume
regular timekeeping. Wait until everything stops moving before performing
any other operation.

E-29

■ The current time setting is off by one hour.
x If you are using the watch in an area where time calibration signal reception is possible, see “To
conﬁgure Home City settings” (page E-19).
x The period when summer time is applied in the location where you are using the watch may be
different from the period set for your currently selected Home City. Use the procedure under “To switch
between standard time and summer time manually” (E-21) to switch from AUTO to STD (for standard
time) or DST (for summer time).
■ The hands and/or day indicator is off.
This could indicate that the watch has been exposed to magnetism or strong impact, which has caused
problems with proper hand and day indicator alignment. Adjust the watch’s hand and day indicator home
position alignment (page E-27).
Charging
■ The watch does not resume operation after I expose it to light.
This can happen after the power level drops to Level 3 (page E-8). Continue exposing the watch to light
until the x Second Hand starts moving normally (at one-second intervals).
■ The x Second Hand starts to move at one-second intervals, but then suddenly returns to moving
at two-second intervals.
The watch probably is not sufficiently charged yet. Continue keeping it exposed to light.

■ The current time setting is off by hours.
x Your Home City setting may be wrong. Check your Home City setting and correct it, if necessary (page
E-19).

E-30

E-31

Operation Guide 5235 (OC)
■ The current time setting is off by one hour.

Time Calibration Signal
The information in this section applies only when LONDON (LON), PARIS (PAR), ATHENS (ATH),
HONOLULU (HNL), ANCHORAGE (ANC), LOS ANGELES (LAX), DENVER (DEN), CHICAGO (CHI),
NEW YORK (NYC), HONG KONG (HKG), or TOKYO (TYO) is selected as the Home City. You need to
adjust the current time manually when any other city is selected as the Home City.
■ The x Second Hand indicates NO (N) when I check the result of the latest receive operation.
Possible Cause

Remedy

Page

x You are wearing or moving the watch, or
performing a button operation during the signal
receive operation.
x The watch is in an area with poor reception
conditions.

Keep the watch in an area where reception
conditions are good while the signal receive
operation is being performed.

E-13

You are in an area where signal reception is not
possible for some reason.

See “Approximate Reception Ranges”.

The calibration signal is not being transmitted for
some reason.

x Check the website of the organization that
maintains the time calibration signal in your area
for information about its down times.
x Try again later.

E-12

—

■ The current time setting changes after I set it manually.
You may have the watch configured for Auto Receive of the time calibration signal (page E-14), which will
cause the time to be adjusted automatically according to your currently selected Home City. If this results
in the wrong time setting, check your Home City setting and correct it, if necessary (page E-19).

Possible Cause

Remedy

Page

The period when summer time is applied in the
location where you are using the watch may be
different from the period set for your currently
selected Home City.

Use the procedure under “To switch between
standard time and summer time manually” to switch
from AUTO to STD (for standard time) or DST (for
summer time).

E-21

■ Auto Receive is not performed or I cannot perform Manual Receive.
Possible Cause

Remedy

Page

Your Home City setting is wrong.

Check your Home City setting and correct it, if
necessary.

E-11
E-19

There is not enough power for signal reception.

Expose the watch to light to charge it.

E-7

■ Signal reception is being performed successfully, but the time and/or day is wrong.
Possible Cause

Remedy

Page

Your Home City setting is wrong.

Check your Home City setting and correct it, if
necessary.

E-11
E-19

The watch may have been exposed to magnetism
or strong impact, which has caused problems with
proper hand and day indicator alignment.

Adjust the watch’s hand and day indicator home
positions.

E-27

E-32

E-33

Specifications
Accuracy at normal temperature: ±15 seconds a month (with no signal calibration)
Timekeeping (World time): Hour, minutes (hand moves every 10 seconds), seconds, day
Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099
Other: Home City code (can be assigned one of 29 city codes and Coordinated Universal Time);
Daylight Saving Time (summer time) / Standard Time
Time Calibration Signal Reception: Auto receive up to six times a day (5 times a day for the Chinese
calibration signal; Remaining auto receives cancelled as soon as one is successful);
Manual receive
Receivable Time Calibration Signals:
Mainflingen, Germany (Call Sign: DCF77, Frequency: 77.5 kHz); Anthorn, England
(Call Sign: MSF, Frequency: 60.0 kHz); Fukushima, Japan (Call Sign: JJY, Frequency:
40.0 kHz); Fukuoka/Saga, Japan (Call Sign: JJY, Frequency: 60.0 kHz); Fort Collins,
Colorado, the United States (Call Sign: WWVB, Frequency: 60.0 kHz); Shangqiu City,
Henan Province, China (Call Sign: BPC, Frequency: 68.5 kHz)
Other: Power Saving; Low battery alert; Auto Correction of Hand Home Positions
Power Supply: Solar panel and one rechargeable battery
Approximate battery operating time: 7 months (from full charge to Level 3)
under the following conditions:
x Hands operational 18 hours per day, sleep state 6 hours per day
x 4 minutes of signal reception per day

City Code Table

E-34

L-1

City Code Table
City Code
PAGO PAGO
HONOLULU
ANCHORAGE
LOS ANGELES
DENVER
CHICAGO
NEW YORK

(PPG)
(HNL)
(ANC)
(LAX)
(DEN)
(CHI)
(NYC)

SANTIAGO

(SCL)

RIO
F. DE NORONHA (FEN)
PRAIA
(RAI)
UTC

London

LONDON

(LON)

PARIS

(PAR)

Paris

ATHENS

(ATH)

Athens

JEDDAH

(JED)

Jeddah

TEHRAN

(THR)

Tehran

+3.5

L-2

DUBAI
KABUL
KARACHI
DELHI
DHAKA
YANGON
BANGKOK
HONG KONG
TOKYO
ADELAIDE
SYDNEY
NOUMEA

(DXB)
(KBL)
(KHI)
(DEL)
(DAC)
(RGN)
(BKK)
(HKG)
(TYO)
(ADL)
(SYD)
(NOU)

Dubai
Kabul
Karachi
Delhi
Dhaka
Yangon
Bangkok
Hong Kong
Tokyo
Adelaide
Sydney
Noumea

UTC Offset/
GMT Differential
+4
+4.5
+5
+5.5
+6
+6.5
+7
+8
+9
+9.5
+10
+11

WELLINGTON

(WLG)

Wellington

+12

City Code
Summer Time Period
UTC Offset/
GMT Differential
Summer Time Start
Summer Time End
Pago Pago
–11
None
None
Honolulu
–10
Anchorage
–9
Los Angeles
–8
2:00 a.m., second Sunday 2:00 a.m., ﬁrst Sunday in
Denver
–7
in March
November
Chicago
–6
New York
–5
Midnight, second Saturday Midnight, second Saturday
Santiago
–4
in October
in March
Midnight, third Sunday
Midnight, third Sunday in
Rio De Janeiro
–3
in February or Midnight,
October
fourth Sunday in February
Fernando de Noronha
–2
Praia
–1
None
None
City

1:00 a.m., last Sunday
in March
2:00 a.m., last Sunday
in March
3:00 a.m., last Sunday
in March
None
Midnight, March 22 or
Midnight, March 21

2:00 a.m., last Sunday in
October
3:00 a.m., last Sunday in
October
4:00 a.m., last Sunday in
October
None
Midnight, September 22 or
Midnight, September 21

City

Summer Time Period
Summer Time Start
Summer Time End
None
None

None

2:00 a.m., ﬁrst Sunday in
October
None
2:00 a.m., last Sunday in
September

3:00 a.m., ﬁrst Sunday
in April
None
3:00 a.m., ﬁrst Sunday
in April

x Based

on data as of December 2010.
x The
rules governing global times (UTC offset and GMT differential) and summer time are determined

by each individual country.

x The
summer time periods in this table are applicable to speciﬁc cities. For cities not included in the
list, select the list city that is in the same time zone as the desired city and perform STD/DST settings
manually.

L-3

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