SEIKO 72B7, 62B7 Instruction Manual

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7B62 / 7B72 BSJ7BCC-A2102

Solar Radio Signal for 5 Areas Around the World (Japan, China, U.S.A., Germany, UK)

C-25

7B62 / 7B72

INSTRUCTIONS

日本語

..................................................

English ................................................

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Please refer to the Instruction Manuals of other languages by accessing "Customer Service"→ "Instruction" on our Website from PC or Smartphone.

Thank you very much for choosing a SEIKO watch.

HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)

Automatic reception and manual reception

Radio signal reception range: Japan (JJY)

Radio signal reception range: China (BPC)

Radio signal reception range: U.S.A. (WWVB)

TIME DIFFERENCE ADJUSTMENT FUNCTION

Time difference adjustment function (When using overseas)

Time difference adjustment function characteristics

TO PRESERVE THE QUALITY OF YOUR WATCH

How to conduct manual reception (Receive a radio signal manually)

Automatic hand position adjustment function (Adjustment of preliminary positions of hour, minute and seconds hands)

Preliminary position adjustment of the date

For proper and safe use of your SEIKO watch,

please read carefully the instructions in this

booklet before using it.

Keep this manual handy for easy reference.

* Length adjustment service for metallic bands is available at the retailer from

whom the watch was purchased. If you cannot have your watch repaired by the retailer from whom the watch was purchased because you received the watch as a gift, or you moved to a distant place, please contact SEIKO CUSTOMER SERVICE CENTER. The service may also be available on a chargeable basis at other retailers, however, some retailers may not undertake the service.

* If your watch has a protective film for preventing scratches, make sure to peel

it off before using the watch. If the watch is used with the film on it, dirt, sweat, dust, or moisture may be attached to the film and may cause rust.

CONTENTS

1 HOW TO USE

Handling cautions ............................................ 4

Characteristics ................................................ 8

Names of the parts and their functions .......... 10

How to use the button .................................... 12

Crown ............................................................ 13

2 BEFORE USE

Before Use .................................................... 14

Setting the time and date by receiving a radio

signal ............................................................. 16

Mechanism of radio signal reception ......... 16

Reception environment ................................. 18

Radio signal reception range indication ..... 18

Radio signal reception range: Germany

(DCF77), UK (MSF) ................................... 22

To improve radio signal reception .............. 23

...... 17

....... 19

...... 20

Environments in which it is difficult to

receive a radio signal ................................. 24

How to check the reception status ................. 26

How to display the reception results .......... 26

............................................ 28

Setting the time difference (Setting the radio

signal transmitting station) ............................. 29

List of time zone differences in major regions

of the world .................................................... 31

Time zones and time differences ............... 32

Time difference adjustment Q&A ............... 33

..... 21

.. 28

5 SOLAR CHARGING FUNCTION

Charging the battery ...................................... 34

How to charge the battery .......................... 34

Guide to charging times ............................. 35

About energy ................................................. 36

Energy depletion forewarning function (Twosecond interval movement and Five-second

interval movement) .................................... 36

Power save function .................................. 37

Daily care ...................................................... 38

Performance and type ................................... 39

Lumibrite ....................................................... 40

Power Source ................................................ 41

Water resistant performance ......................... 43

Magnetic resistant performance .................... 44

Band .............................................................. 46

How to use tri-fold type clasp for leather band

(Special clasps) ............................................. 48

After sales service ......................................... 54

7 TROUBLESHOOTING

............................... 56

When a radio signal cannot be received ........ 58

How to manually set the time ..................... 59

How to manually set the date ..................... 61

Preliminary position ....................................... 64

......................... 64

...... 64

How to set the preliminary position ................ 65

Set the preliminary position for the date,

and the hour and minute hands. ................ 65

Troubleshooting ............................................ 69

In case of an abnormal movement ................ 76

Reset the system ....................................... 76

8 SPECIFICATIONS

Specifications ................................................ 78

HOW TO USE

Handling cautions

b WARNING

Please note that there is a risk of serious consequences such as severe injury if the following safety regulations are not strictly observed.

Immediately stop wearing the watch in following cases:

○ If the watch body or band becomes edged by corrosion etc. ○ If the pins protrude from the band.

* Immediately consult the retailer from whom the watch was purchased or SEIKO CUSTOMER SERVICE

CENTER.

Keep the watch and accessories out of the reach of babies and children.

Care should be taken to prevent a baby or a child accidentally swallowing the accessories. If a baby or child swallows the battery or accessories, immediately consult a doctor, as it will be harmful to the health of the baby or child.

Do not remove the secondary battery from the watch.

* About the secondary battery → Power Source → P.41

Replacement of the secondary battery requires professional knowledge and skill. Please ask the retailer from whom the watch was purchased for replacement of the secondary battery. Installation of an ordinary silver oxide battery can generate heat that can cause bursting and ignition.

Please note that there is a risk of minor injury or material damage if the following safety

b CAUTION

regulations are not strictly observed.

Avoid the following places for wearing or keeping the watch:

○ Places where volatile agents (cosmetics such as polish remover, bug repellent, thinners etc.) are

vaporizing

○ Places where the temperature drops below

5°C or rises above 35°C for a long time

○ Places affected by strong magnetism or static

electricity

If you observe any allergic symptoms or skin irritation

Stop wearing the watch immediately and consult a specialist such as a dermatologist or an allergist.

Other cautions

○ For adjusting the length of the metallic band, specialized knowledge and expertise are necessary.

Therefore, in such a case, contact the retailer from whom the watch was purchased. If you attempt to adjust the metallic band, injury may occur to your hand or fingers, or parts of the band may be

lost.

○ Do not disassemble or tamper with the watch. ○ Keep the watch out of the reach of babies and children. Extra care should be taken to avoid risks

of any injury or allergic rash or itching that may be caused when they touch the watch. ○ When disposing of used batteries, follow the instructions of your local authorities. ○ If your watch is of the fob or pendant type, the strap or chain attached to the watch may damage

your clothes, or injure the hand, neck, or other parts of your body.

○ Places affected by strong vibrations ○ Places of high humidity ○ Dusty places

HOW TO USE

b WARNING

Do not use the watch in scuba diving or saturation diving.

The various tightened inspections under simulated harsh environment, which are usually required for watches designed for scuba diving or saturation diving, have not been conducted on the water resistant watch with the BAR (barometric pressure) display. For diving, use watches specifically designed for diving.

b CAUTION

Do not pour running water directly from faucet.

The water pressure of tap water from a faucet is high enough to degrade the water resistant performance of a water resistant watch for everyday life.

Do not turn or pull out the crown when the watch is wet.

Water may get inside of the watch.

* If the inner surface of the glass is clouded with condensation or water droplets appear

inside of the watch for a long time, the water resistant performance of the watch is deteriorated. Immediately consult the retailer from whom the watch was purchased or SEIKO CUSTOMER SERVICE CENTER.

Do not leave moisture, sweat and dirt on the watch for a long time.

Be aware of a risk that a water resistant watch may lessen its water resistant performance because of deterioration of the adhesive on the glass or gasket, or the development of rust on stainless steel.

Do not wear the watch while taking a bath or a sauna.

Steam, soap or some components of a hot spring may accelerate the deterioration of water resistant performance of the watch.

b CAUTION

HOW TO USE

Energy Depletion

Forewarning Function...........

Reception level display

[Manual reception]

High reception level (50-second position)

Low reception level (40-second position)

Unable to receive radio signals (20-second position)

* Reception level display → P.57

Reception result display

[Check of reception result]

Reception successful (10-second position)

Reception failed (20-second position)

* How to display the reception results

→ P.26

Standard radio signal display

Display (Country with radio signal

transmitting station)

Display position

JJY (Japan) 9-second position BPC (China) 8-second position WWVB (U.S.A.) 53-second position DCF (Germany) 1-second position MSF (UK) 0-second position

* Time difference adjustment function → P.28 * List of time zone differences in major regions of the world

→ P.31

HOW TO USE

This is a solar-driven, radio signal-adjusted watch.

• This watch displays the precise time by receiving radio signals conveying time information.

• This watch can receive radio signals from Japan, China, U.S.A., Germany, and the UK.

■ Radio Signal Receiving

Function....................................

→ P.16

■ Reception Level Indication

Function....................................

→ P.57

■ Display Function of Radio

Signal Reception Results........

→ P.26

■ Time Difference Adjustment Function (Selecting

Transmitting Station)...............

→ P.28

Characteristics

The watch maintains the precise time by automatically receiving radio signals on official standard frequencies. Manual reception of radio signals is also possible. This can receive radio signals from Japan (2 stations), China, U.S.A., Germany, and the UK. (Select the transmitting station in the time difference adjustment function.)

The movement of the seconds hand indicates the radio signal reception level during radio signal reception attempts. (Only manual reception)

The movement of the seconds hand indicates radio signal reception results (Yes/No).

Set the time difference in order to display the local time overseas. Additionally, set the time difference to enable reception of the radio signal in areas in which it is available.

■ Solar Charging Function..........

→ P.34

■

→ P.36

■ Power Save Function...............

→ P.37

■ Automatic Hand Position

Alignment Function..................

→ P.64

A solar cell underneath the dial converts any form of light into “electrical energy” to charge it. Once fully charged, the watch continues to run for approximately 9 months.

The movement of the seconds hand indicates that the battery should be charged.

This watch is equipped with a function which can suppress energy consumption when it is left without receiving an adequate light source for a certain length of time.

When the hand positions display an incorrect time as a result of external influences such as magnetism, the watch automatically corrects the hand misalignment.

HOW TO USE

Names of the parts and their functions

Minute hand

Hour hand

Seconds hand

Date

Crown

• Normal position: Reception results confirmation → P.26, Manual reception → P.56

• First click position: Time difference setting → P.29, Manual date setting → P.61

• Second click position: Manual time setting → P.59, Reset the system → P.76

Button → P.12

* The operation method of the button varies with

the functions being used. Follow the instructions of each section of this booklet.

●

HOW TO USE

●

While pressing the crown in, turn it in the direction indicated by the arrow.

The seconds hand moves

at one-second intervals.

The seconds hand moves

at two-second intervals.

The seconds hand moves

at five-second intervals.

The seconds

hand is stopped.

The watch is

sufficiently charged.

The power save function is activated. → P.

Check the movements of the seconds hand

after releasing the Power Save mode.

When the time and

date are correct

Radio signal reception range indication → P. Environments in which it is difficult to receive a radio signal → P.

HOW TO USE

Some models may have a button which is recessed in the watch case to prevent accidental input. Shape of the button differs depending on the design of the watch.

Upper half of the button is covered.

Press the lower half of the button or press the hollow in the middle using an object with a long tapered tip.

How to use the button

The button is covered except the hollow in the middle.

Press the hollow in the middle using an object with a long tapered tip.

The button is recessed in the watch case.

Press the hollow in the middle using an object with a long tapered tip.

Crown

There are two types of crowns, a normal crown and a screw down crown. Please check the type of the crown of your watch.

The crown turns.

The crown

does not

turn.

* By locking the crown by screw, a screw down crown can prevent malfunction and increase water resistance. * Be careful not to screw the crown in by force as it may damage the slots of the crown.

Unlock the crown before operating it.

Unscrew

Pull out the crown and operate it.

Normal crown

Screw down crown

After operating the crown, lock it.

Rotate while pressing the crown in.

HOW TO USE

BEFORE USE

Before Use

Checking the Charging Status

When the movement of the seconds hand shows an energy depletion state, the battery requires charging.

The charged energy is depleted.

The energy stored in the watch runs low.

* If the seconds hand does not move at one-second intervals even after fully charging the battery, refer to

“Charging the solar battery” in Troubleshooting on P.72

→ P.36

Charge the

battery

sufficiently.

How to charge

the battery

→ P.34

Checking the time and date

* When adjusting the time or date, refer to the following pages regarding the procedures.

Use the watch without

adjustment.

When the radio

signal can be

When the time

and date are

incorrect

* When the watch does not display the correct time and date even after successfully receiving a radio signal, refer

to Troubleshooting.→ Misalignment of the time and hand positions P.72, and Misalignment of the date P.74

Time

difference

setting

confirmation

→ P.29

received

When a radio signal cannot

be received

Setting the time and date

by receiving a radio

signal → P.56

Manually set the time

→ P.59

Manually set the date

→ P.61

BEFORE USE

Setting the time and date by receiving a radio signal

■ Mechanism of radio signal reception

Official standard

frequency

When the watch does not display the correct time and date even after successfully receiving a radio signal, refer to Troubleshooting. “Misalignment of the time and hand positions” → P.72, “Misalignment of the date” → P.74

The radio-controlled watch displays the precise Time and Date by automatically receiving and synchronizing itself with the radio signal of an official standard frequency.

HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)

Transmitting

Station

Cesium

Atomic

Clock

Time signal transmitted by a standard frequency is based on a super accurate “Cesium Atomic Clock” that may have a 1 second loss or gain per one hundred thousand years.

Radio-controlled watch

Receive radio signals through

the antenna inside the watch

Analyze time information

Display the current Time and

Date

■ Automatic reception and manual reception

●

Automatic reception

This watch sets the time and date by automatically receiving a radio signal at a fixed time. It automatically receives a radio signal before 2:00 AM, 3:00 AM and 4:00 AM.

* When the reception is successful, the watch finishes the automatic reception.

• Place the watch in a place where it can easily receive a radio signal (by the window, etc.).

• Do not move the watch during the radio signal reception. “To improve radio signal reception” → P.23

●

Manual reception

This watch can receive a radio signal arbitrarily at any time other than the automatic reception mode.

“How to conduct manual reception” → P.56

* Radio signal reception results depend on the receiving environment. “Environments in which it is difficult to receive

a radio signal” → P.24

* The watch cannot receive a radio signal outside the radio signal reception range. “Radio signal reception range

indication” → P.18

* When the time difference is set for a region other than radio signal reception range, a radio signal cannot be

received. Check the setting of the time difference. “Setting the time difference (Setting the radio signal transmitting station)” → P.29

HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)

Reception environment

■ Radio signal reception range indication

This watch receives standard radio signals from Japan (2 stations), China, U.S.A., Germany and UK. Select the transmitting station in the time difference adjustment function to switch the standard radio signal

to receive.

HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)

“Setting the time difference (Setting the radio signal transmitting station)” → P.29

Germany (DCF77), UK (MSF)

P.22

China (BPC)

P.20

Japan (JJY)

P.19

U.S.A.

(WWVB)

P.21

■ Radio signal reception range: Japan (JJY)

The reception range from the transmitting station is approximately 1,000 km (1,000 km radius of the transmitting station).

JJY is operated by the National Institute of Information and Communications Technology (NICT). JJY is transmitted from two stations in Japan. Each station transmits JJY in a different frequency.

Hagane-yama transmitting station (60 kHz)

1,000 km

Ohtakadoyayama transmitting station (40 kHz)

1,000 km

Fukushima : Ohtakadoya-yama transmitting

Kyushu : Hagane-yama transmitting station

* NICT: National Institute of Information and

Communications Technology

* Even within the reception range, weather conditions,

terrain, buildings, and orientation may mean that reception is not possible. “Environments in which it is difficult to receive a radio

signal” → P.24

station Frequency: 40 KHz

Frequency: 60 KHz

HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)

■ Radio signal reception range: China (BPC)

Fort Collins transmitting station Frequency (60 KHz)

■ Radio signal reception range: Germany (DCF77), UK (MSF)

Each reception range from the transmitting station of DCF77 and MSF is approximately 1,000 km and 500 km (1,000 km and 500 km radius of the each transmitting station). There are four time zones within the reception range.

Approx. 500 km

The reception range from the transmitting station is approximately 1,500 km (1,500 km radius of the transmitting station).

BPC is operated by NTSC.

HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)

Shangqiu National Time Service Center (68.5 kHz)

1,500 km

Shangqiu National Time Service Center Frequency: 68.5 kHz

* NTSC: National Time Service Center

* The watch may be able to receive radio signals outside

a reception range if the receiving conditions are favorable.

* Even within the reception range, weather conditions,

terrain, buildings, and orientation may mean that reception is not possible. “Environments in which it is difficult to receive a radio

signal” → P.24

■ Radio signal reception range: U.S.A. (WWVB)

The reception range from the transmitting station is approximately 1,500 km (1,500 km radius of the transmitting station). There are four time zones within the reception range.

1,500 km

WWVB is operated by NIST.

Fort Collins transmitting station Frequency: 60 kHz

* NIST: National Institute of Standards and Technology

* The watch may be able to receive radio signals outside

a reception range if the receiving conditions are favorable.

* Even within the reception range, weather conditions,

terrain, buildings, and orientation may mean that reception is not possible. “Environments in which it is difficult to receive a radio

signal” → P.24

* Use of automatic reception is recommended, as this

time frame is optimal for automatic reception.

HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)

Anthorn transmitting station

(60.0 kHz)

HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)

Mainflingen transmitting station (77.5 kHz)

1,000 km

DCF77 is operated by PTB.

Southeastern Frankfurt Mainflingen transmitting station (77.5 kHz)

* PTB: Physikalisch-Technische Bundesanstalt

MSF is operated by NPL.

Northern England Anthorn transmitting station Frequency: 60.0 kHz

* NPL: National Physical Laboratory

* Even within the reception range, weather conditions,

terrain, buildings, and orientation may mean that reception is not possible. “Environments in which it is difficult to receive a radio

signal” → P.24

* Use of automatic reception is recommended, as this

time frame is optimal for automatic reception.

■ To improve radio signal reception

●

Place the watch in a place where it can easily receive a radio signal such as near a window.

The antenna is embedded at the 9 o’clock position of the watch. Turning the antenna toward the outside of a window or the direction facing transmitting stations helps improve radio signal reception.

* Locations of transmitting stations

“Radio signal reception range indication” → P.18

●

Do not move the watch while it is receiving radio signals.

To enhance the reception of radio signals, do not move the watch or do not change the orientation of the watch while it is receiving radio signals.

* If the button or crown is operated while the watch is receiving a

radio signal, the reception will be cancelled.

●

The place where the watch is put before going to bed

Place the watch next to a window facing in the direction of a transmitting station before bedtime because

automatic reception is performed late at night. The standard radio signal is influenced by the distance from the transmitting station, as well as by terrain (including buildings) and weather conditions. Also, please search for a place to easily receive radio signals when attempting reception.

Antenna

HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)

■ Environments in which it is difficult to receive a radio signal

Avoid putting the watch in such places when it receives radio signals.

Press the

button once

and then

release it

HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)

• Close to home electrical appliances such as TV’s, refrigerators or air conditioners

• Close to OA equipment such as

mobile phones, personal computers or fax machines

• Close to steel desks or other

furniture made of metal

• In places generating radio

interference, such as construction sites or places with heavy traffic

• Inside a building, between tall

buildings, underground

• Close to overhead power lines, TV

stations, train cables

• Inside a vehicle, train, or airplane

CAUTION

• The watch may display the wrong time if it fails to receive radio signals properly because of interference. The watch may also fail to receive radio signals properly depending on the location or radio wave receiving conditions. In this case, move the watch to another place where it can receive radio signals.

• When the watch is out of reception range, its accurate quartz movement (loss / gain: ±15 seconds per month on average) will continue to keep the time.

• The time signal transmission may be stopped during maintenance of the facilities of the (each) transmitting station or because of a lightning strike. In such a case, see the (each) station’s website for further information or contact SEIKO CUSTOMER SERVICE CENTER.

• Websites of transmission stations (As of August 2020)

Japan : National Institute of Information and Communications Technology (Japan

Standard Time Project) http://jjy.nict.go.jp/ China : NTSC http://www.ntsc.cas.cn/ U.S.A. : NIST https://www.nist.gov/pml/time-and-frequency-division/radio-

stations/wwvb Germany : PTB https://www.ptb.de/cms/en.html UK : NPL https://www.npl.co.uk/

HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)

How to check the reception status

■ How to display the reception results

The seconds hand indicates the latest reception results (Yes/No) of a radio signal for 5 seconds.

HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)

Press the button once and then

release it.

The seconds hand indicates the reception results.

Check if the reception was

successful (within 5 seconds).

If a reception was

successful: The seconds hand points to Y (Yes: the 10-second position)

If a reception has failed: The seconds hand points to N (No: the 20-second position)

* If the button is pressed after 5 seconds have

elapsed or while the seconds hand is moving to display the reception results, the reception results display function is cancelled and the watch returns to the TIME display mode.

If a reception was successful: The seconds hand points to Y

• A radio signal has been received successfully. Use the watch without any adjustments.

* When the watch does not display the correct time and date even after successfully receiving a radio signal, refer

to Troubleshooting.→ Misalignment of the time and hand positions P.72, and Misalignment of the date P.74

If reception has failed: The seconds hand points to N

•

Place the watch in a place where it can easily receive a radio signal, or change its direction. Even within the radio signal reception range, this watch may fail to receive a radio signal depending on the condition (due to the influence of weather, terrain, buildings, or direction). “Environments in which it is difficult to receive a radio signal” → P.24 This watch is unable to receive radio signals outside the reception range. “Radio signal reception range indication” → P.18

Make sure that the time difference is correctly selected before attempting radio signal reception.

• If the time difference is set to an area outside reception range, then reception of the radio signal will not be possible. Check the time difference setting. “Setting the time difference (Setting the radio signal transmitting station)” → P.29 “List of time zone differences in major regions of the world” → P.31

Attempt to receive a radio signal in a different time period. (In the case of manual reception)

• Receiving environments differ according to time periods even at the same place. Due to radio signal characteristics, the watch is able to easily receive radio signals during nighttime hours.

• If you use the watch in a place or region outside the radio signal reception range or when the watch

cannot successfully receive radio signals, manually set the time and date. “How to manually set the time” → P.59 “How to manually set the date” → P.61

HOW TO SET THE TIME (RADIO SIGNAL RECEPTION)

Time difference adjustment function (When using overseas)

■ Time difference adjustment function characteristics

Set the time difference in the time difference adjustment mode

to display an overseas local time. The watch can display an overseas local time in one-hour units. The time difference is set based on UTC (Coordinated Universal Time). The range of time differences around the world based on UTC is [from -11 hours to +13 hours].

In the time difference adjustment mode, the time difference

based on UTC (Coordinated Universal Time) is displayed by

the position of the seconds hand. To set the time difference, turn the crown to move the seconds hand to the correct position.

A radio signal transmitting station is selected by setting the

time difference. When setting the time difference for a region other than the radio signal reception ranges, the radio signal reception function will not work.

Examples

When using the watch in Japan, set the seconds hand to the [9-second position: Tokyo] to receive a radio signal from Japan. When using the watch in China, set the seconds hand to the [8-second position: Beijing].

“Setting the time difference (Setting the radio signal transmitting station)” → P.29 “List of time zone differences in major regions of the world” → P.31

* The numbers in parenthesis are time differences based on UTC.

Pull the

crown to the

first click

Turn the crown clockwise to advance the time difference.

Turn the crown counterclockwise to set back the time difference.

Pull the crown to the first click.

The watch switches to the time difference adjustment mode, and the seconds hand moves to the currently-set time difference.

Turn the crown to set the seconds hand to the time difference of the target area.

Turn the crown to move the seconds hand, and the hour and minute hands will move accordingly. One-second movement of the hand indicates the time difference has changed by one hour. The position of the seconds hand shows the difference. Please set it by referring to P.31. The hour and minute hands show the time in the location of the set time difference.

The seconds hand can also be moved while the hour and minute hands are moving.

The radio signal transmitting station can be changed by setting the time difference. When setting a time difference for regions other than the radio signal reception ranges, the radio signal reception function will not work.

* When setting the Daylight Saving Time (DST), add one hour to the time difference of the target area.

* When the seconds hand is at 13 seconds (UTC +13 hours), turn the crown clockwise to move to the 49-second position

(UTC -11 hours).

* When the seconds hand is at 49 seconds (UTC -11 hours), turn the crown counterclockwise to move to the 13-second

position (UTC +13 hours).

Push the crown back in.

The seconds hand returns to normal one-second interval movement.

* When the date is changed, it is also moved.

List of time zone differences in major regions of the world

Time difference

setting

seconds hand

position

Time difference from UTC

Time zone

representative

city

Reception frequency

0 seconds ±0 hours London MSF/DCF77

1 second +1 hour Paris / Berlin MSF/DCF77 2 seconds +2 hours Cairo MSF/DCF77 3 seconds +3 hours Jeddah DCF77

4 seconds +4 hours Dubai DCF77 △ 5 seconds +5 hours Karachi 6 seconds +6 hours Dhaka 7 seconds +7 hours Bangkok -

8 seconds +8 hours Beijing BPC 9 seconds +9 hours Tokyo JJY

10 seconds +10 hours Sydney JJY △ 11 seconds +11 hours Noumea 12 seconds +12 hours Wellington -

13 seconds +13 hours

Nuku’alofa (Tongatapu)

Time difference

setting

seconds hand

position

Time

difference

from UTC

Time zone

representative

city

Reception frequency

49 seconds -11 hours Midway Island 50 seconds -10 hours Honolulu 51 seconds -9 hours Anchorage -

52 seconds -8 hours Los Angeles WWVB 53 seconds -7 hours Denver WWVB 54 seconds -6 hours Chicago WWVB 55 seconds -5 hours New York WWVB

56 seconds -4 hours Santo Domingo WWVB △ 57 seconds -3 hours Rio de Janeiro -

58 seconds -2 hours

Fernando de Noronha

59 seconds -1 hour Azores Islands -

To use Daylight Saving Time (DST) where this is observed, select the time zones with a △ mark in the Reception

frequency columns.

•

Setting the time difference (Setting the radio signal

transmitting station)

0-second position: UTC

London (±0): MSF

Berlin (+1): DCF77

Beijing (+8): BPC

Tokyo (+9): JJY

TIME DIFFERENCE ADJUSTMENT FUNCTION

•

Denver (-7): WWVB

-11

In Japan In China In the other countries

TIME DIFFERENCE ADJUSTMENT FUNCTION

Set to the 9-second position

Set to the 8-second position

“List of time zone differences in major regions of the world”

→ P.31

01 2

Refer to the table below to set the time difference area in the Time Difference Adjustment mode.

* When setting a time difference for a region where no receivable official standard frequency is mentioned in the

table below, the radio signal reception function will not work.

(As of August 2020)

TIME DIFFERENCE ADJUSTMENT FUNCTION

■ Time zones and time differences

The watch is used or stored under conditions where it cannot be exposed to light for a long time.

Illuminance

lx (LUX)

Light source Condition (Example)

From the state where the watch is

stopped (Not charged)

In the state where

the hand moves (The

watch is charged)

Time required for fully charging the

watch

Time required for charging the watch to start moving at one-second intervals

Time required for

charging the watch

to last for 1 day

700

Fluorescent

light

General offices - - 4 hours

3,000

Fluorescent

light

30 W 20 cm 230 hours 6 hours 1 hour

10,000

Fluorescent

light

30 W 5 cm

60 hours 1.5 hours 15 minutes

Sunlight Cloudy day

100,000 Sunlight

Sunny day (Under the

direct sunlight on a

summer day)

30 hours 30 minutes 3 minutes

The figures of “Time required for charging the watch to start moving at one-second intervals” are estimations of time required to charge the stopped watch by exposing it to light until it moves at steady one-second intervals. Even if the watch is partially charged for a shorter period, the watch will resume one-second interval movement. However, it may shortly return to two-second interval movement. Use the charging time in this column as a rough guide for sufficient charging time.

* The seconds hand movement indicates the remaining amount of energy. “Checking the Charging Status” → P.14 * The required charging time slightly varies depending on the model of the watch.

There are time differences around the world based on “Coordinated Universal Time (UTC).” There are 24 regions (Time Zones) around the world with a time difference of one hour. This system has been adopted internationally by setting the total time difference around the world as 24 hours. Further, Daylight Saving Time (DST) is individually adopted in countries and regions.

[What is UTC (Coordinated Universal Time)?]

UTC is the universal standard time coordinated through international agreement. It is used as the official

TIME DIFFERENCE ADJUSTMENT FUNCTION

time around the world. UTC is a time coordinated by adding leap seconds to the “International Atomic Time (TAI)” determined from atomic clocks in the world, in order to correct the deviation from the astronomically defined universal time (UT).

[What is summer time (DST)?]

Summer time is Daylight Saving Time (DST). Advance the watch one hour to prolong daytime during longer daylight hours in summer. Daylight saving time has been adopted in about 80 countries, mainly in Europe and North America. The adoption and duration of Daylight Saving Time (DST) vary depending on the country.

* Time differences between regions and daylight saving time may change due to circumstances of a country or

region.

* In some regions, time zones that differ from UTC by half- or quarter-hour time differences are established. (For

example, some parts of India)

* Each indication may differ depending on the model (design) of the watch.

■ Time difference adjustment Q&A

Q : When returning to Japan from overseas, is the time automatically set to Japan time? A : Just moving does not adjust your watch to Japanese local time.

When wearing a watch in Japan, set to Japan time by use of the time difference adjustment function.

Q : The hands stop during operation of time difference setting, therefore, does time lag occur? A : The internal circuit stores the time, therefore, no time lag occurs.

Q : When a time difference for regions out of the radio signal reception range is set, the watch will not

receive a radio signal. How is the accuracy of the watch at that time?

A : The watch has an accuracy of a normal quartz watch in that case. (Monthly rate: ±15 seconds)

Q : How is adjustment made to a local time with a time difference of 15 minutes or 30 minutes? A : The time can be adjusted on a 1 hour basis by use of the time difference adjustment function. When

adjusting to a local time with a time difference of 15 minutes or 30 minutes, refer to “How to manually

set the time” → P.59

TIME DIFFERENCE ADJUSTMENT FUNCTION

Charging the battery

■ How to charge the battery

Expose the dial to light to charge the watch.

SOLAR CHARGING FUNCTION

To ensure optimal performance of the watch, make sure that the watch is kept sufficiently charged at all times.

* Be careful to make sure that the watch does not get hot when it is charging. (The operating temperature range is

-10°C to +60°C.)

* When you first start using the watch or starting it after it stopped due to a lack of charge, charge the watch sufficiently

using the table on P.35 as a guide.

Under the following situations, the energy of the watch is likely to be depleted, resulting in stoppage of the watch:

• The watch is concealed under a sleeve.

•

■ Guide to charging times

Charge the watch using the times below as a guide.

SOLAR CHARGING FUNCTION

About energy

This watch is equipped with a power save function which can suppress energy consumption when it is left without receiving an adequate light source for a certain length of time.

* There are two types of power save mode.

Power Save 1 Power Save 2

Condition

The watch is exposed to a state without receiving an adequate light source for 72 hours or longer.

The watch is in an insufficient charging state for a long time.

Situation

The seconds hand stops pointing at the 15-second position, and the hour and minute hands, and date also stop. The watch conducts automatic radio signal receiving.

The seconds hand stops pointing at the 45-second position, and the hour and minute hands, and date also stop. The watch does not conduct automatic radio signal receiving.

* The date shows “1”.

How to

handle the

situation

When the watch is exposed to an adequate light source for 5 seconds or longer, or the button is pressed, it displays the current time again after the seconds hand is rapidly advanced.

After sufficiently charging the battery, set the watch for the current time, if necessary.

Power Save 2

* While the watch is being charged, the seconds hand moves at “Five-second Intervals.” During the “Five-second Interval Movement,”

neither the button nor the crown can be operated.

* If the “Power Save 2” mode is prolonged, the stored power amount drops and the internal current time information stored will be lost.

When the watch returns to its normal movement of one-second interval after sufficiently charging the battery, set the current time by receiving a radio signal. (“Automatic reception and manual reception” → P.17)

■ Energy depletion forewarning function (Two-second interval movement and Five-second interval movement)

The energy depletion forewarning function is activated when the energy stored in the watch runs low. In such a case, the seconds hand moves at two-second intervals. If the watch continues to be in the state of two-second interval movement, the watch switches to five-second interval movement, followed by a completely stopped state. If the energy depletion forewarning function is activated, charge the watch sufficiently.

“How to charge the battery” → P.34

SOLAR CHARGING FUNCTION

“Guide to charging times” → P.35

* Neither the button nor the crown can be operated while the seconds hand moves at two-second or five-second

intervals. (This is not a malfunction.)

* While the seconds hand moves at five-second intervals, the hour and minute hands, as well as the date, stop

operating.

* While the seconds hand moves at five-second intervals, the automatic reception function and manual reception

function will not work. After the watch is charged sufficiently and the seconds hand returns to normal one-second interval movement, conduct the manual reception of radio signals to set the watch to the correct time. (“Automatic

reception and manual reception” → P.17)

■ Power save function

SOLAR CHARGING FUNCTION

TO PRESERVE THE QUALITY OF YOUR

Daily care

●

The watch requires good daily care

• Do not wash the watch when its crown is in the extended position.

• Wipe away moisture, sweat or dirt with a soft cloth.

• After soaking the watch in seawater, be sure to wash the watch in clean pure water and wipe it dry carefully.

WATCH

Do not pour running water directly from a faucet onto the watch. Put some water into a bowl first, and then soak the watch in the water to wash it.

* If your watch is rated as “Non-water resistant” or “water resistant for daily use,” please do not wash the watch.

“Performance and type” → P.39 “Water resistant performance” → P.43

●

Turn the crown from time to time

• In order to prevent corrosion of the crown, turn the crown from time to time.

• The same practice should be applied to a screw down crown. “Crown” → P.13

●

Press the button once in a while

• Press the button once in a while to prevent corrosion of the button.

* If the display is changed by pressing any button, wait and leave it as is.

Performance and type

The case back shows the caliber and performance of your watch

Water resistant

7B72-0AA0

performance

Magnetic resistant

performance

Case Number

•

Water resistant performance

Please refer to P.43.

Case Number

•

Magnetic resistant performance

Please refer to P.44 and P.45.

The number to identify the type of your watch.

* The above illustration is provided as an example, therefore it may not be exactly the same as your watch.

TO PRESERVE THE QUALITY OF YOUR

WATCH

TO PRESERVE THE QUALITY OF YOUR

Water resistance for everyday life at 10 (20)-BAR water resistant

Lumibrite

Power Source

TO PRESERVE THE QUALITY OF YOUR

If your watch has Lumibrite

Lumibrite is a luminous paint that absorbs the light energy of sunlight and lighting apparatuses in a short time and stores it to emit light in the dark. For example, if exposed to a light of more than 500 lux for approximately 10 minutes, Lumibrite can emit light for 3 to 5 hours. Please note, however, that, as Lumibrite emits the light it stores, the luminance level of the light decreases gradually over time. The duration of the emitted light may also differ slightly depending on such factors as the brightness of the place where the watch is exposed to light and the distance from the light source to the watch.

WATCH

* In general, when coming from a place that is bright to a place that is dark, it takes human eyes some time to adapt

to the darkness making it difficult to see objects initially. (Dark adaptation)

* Lumibrite is luminous paint that stores and emits light, which is harmless to human beings and the environment,

containing no toxic materials such as radioactive substances.

Sunlight

Indoor (Window-side during

daytime)

Lighting apparatus (40-watt daylight

fluorescent light)

TO PRESERVE THE QUALITY OF YOUR

* Overcharge prevention function

When the secondary battery is fully charged, the overcharge prevention function is automatically activated to avoid further charging. There is no need to worry about damage caused by overcharging no matter how much the secondary battery is charged in excess of the “time required for fully charging the watch.”

* For the required time to fully charge the battery, see “Guide to charging times” → P.35.

WATCH

■ Notes on charging the watch

Condition Illumination

Fine weather 100,000 lux

Cloudy weather 10,000 lux

Fine weather More than 3,000 lux

Cloudy weather 1,000 to 3,000 lux

Rainy weather Less than 1,000 lux Distance to the watch: 1 m 1,000 lux Distance to the watch: 3 m 500 lux (Average room luminance) Distance to the watch: 4 m 250 lux

WARNING

• When charging the watch, do not place the watch in close proximity to an intense light source such as lighting equipment for photography, spotlights or incandescent lights,

as the watch may be excessively heated resulting in damage to its internal parts.

• When charging the watch by exposure to direct sunlight, avoid places that easily reach high temperatures, such as a car dashboard.

• Always keep the watch temperature under 60°C.

The battery used in this watch is a special secondary battery, which is different from ordinary batteries. Unlike an ordinary silver oxide battery, the secondary battery does not require periodic replacement.

The capacity or charging efficiency may gradually lower due to long-term use or operating environment. In addition, long-term use may shorten the charge duration due to wear, contamination, lubricant deterioration of mechanical parts, etc. Request repair when the performance lowers.

WARNING

■ Notes on replacing the secondary battery

• Do not remove the secondary battery from the watch. Replacement of the secondary battery requires professional knowledge and skill. Please ask the retailer from whom the watch was purchased for replacement of the secondary battery.

• Installation of an ordinary silver oxide battery can generate heat that can cause bursting and ignition.

Water resistant performance

Refer the table below for the description of water resistant performance of your watch before using. (Please look at P.39.)

Indication on the

case back

No indication Non-water resistance Avoid drops of water or sweat

WATER

RESISTANT

WATER

RESISTANT

5 BAR

WATER

RESISTANT

20）BAR

10（

Water resistant

performance

Water resistance for everyday life

Water resistance for everyday life at 5-BAR water resistant

Conditions of Use

The watch withstands accidental contact with water in everyday life.

The watch is suitable for sports such as swimming.

The watch is suitable for diving not using an air cylinder.

WARNING

Please do not use it for swimming.

WATCH

TO PRESERVE THE QUALITY OF YOUR

WATCH

TO PRESERVE THE QUALITY OF YOUR

Refrain from wearing a leather band watch other than Aqua Free bands while bathing, swimming, and

when working with water even if the watch itself is water resistant enforced for daily use (10-BAR/20-BAR

water resistant).

Magnetic resistant performance

a watch may temporarily gain or lose time or stop operating.

* When the hand positions deviate to display incorrect time as a result of influence of magnetism, this watch

automatically corrects the hand alignment itself. (P.64)

Indication on the case back Condition of use

WATCH

No indication Keep the watch more than 10 cm away from magnetic products.

If the watch becomes magnetized and its accuracy deteriorates to an extent exceeding the specified rate under normal use, the watch needs to be demagnetized. In this case, you will be charged for demagnetization and accuracy readjustment even if it happens within the guarantee period.

The reason why a watch is affected by magnetism

The built-in motor is provided with a magnet, which may be influenced by a strong external magnetic field.

Affected by nearby magnetism,

b DANGER

Keep the watch more than 5 cm away from magnetic products.

(JIS level-1 standard)

Keep the watch more than 1 cm away from magnetic products.

(JIS level-2 standard)

Examples of common magnetic products that may affect watches

Smartphone, cellular phone, tablet terminal

(Speaker, magnet of cover)

AC-powered

shaver

Magnetic

cooking device

Portable radio

(Speaker)

AC adapter Bag

Magnetic necklace

(With magnet

buckle)

Magnetic health

pillow

TO PRESERVE THE QUALITY OF YOUR

WATCH

TO PRESERVE THE QUALITY OF YOUR

Band

The band touches the skin directly and becomes dirty with sweat or dust. Therefore, lack of care may accelerate deterioration of the band or cause skin irritation or stain on the sleeve edge. The watch requires a lot of attention for long usage.

●

Metallic band

• Moisture, sweat or soil will cause rust even on a stainless steel band if they are left for a long time. Lack of care may result in a rash or cause a yellowish or gold stain on the lower sleeve edge of shirts.

•

• Wipe off moisture, sweat or soil with a soft cloth as soon as possible.

WATCH

• To clean the soil around the joint gaps of the band, wipe it out in water and then brush it off with a soft

toothbrush.

(Protect the watch body from water splashes by wrapping it up in plastic wrap etc.)

Clean it off with a soft cloth.

• Because some titan bands use pins made of stainless steel, which has outstanding strength, rust may

form in the stainless steel parts.

• If rust advances, pins may poke out or drop out, and the watch case may fall off the band, or the clasp may not open.

• If a pin is poking out, personal injury may result. In such a case, refrain from using the watch and request repair.

●

Leather band

• A leather band is susceptible to discoloration and deterioration from moisture, sweat and direct sunlight.

• Wipe off moisture and sweat as soon as possible by gently blotting them up with a dry cloth.

• Do not expose the watch to direct sunlight for a long time.

• Please take care when wearing a watch with light-colored band, as dirt is likely to show up.

•

●

Polyurethane band

• A polyurethane band is susceptible to discoloration from light, and may be deteriorated by solvent or atmospheric humidity. Especially a translucent, white, or pale colored band easily adsorbs other colors, resulting in color smears

•

or discoloration.

• Wash out dirt in water and clean it off with a dry cloth. (Protect the watch body from water splashes by wrapping it up in plastic wrap etc.)

• When the band becomes less flexible, have the band replaced with a new one. If you continue to use the band as it is, the band may develop cracks or become brittle over time.

Notes on skin

irritation and

allergy

Notes on the length of the band

Skin irritation caused by a band may result from various factors such as allergy to metals or leathers, or skin reactions against friction on dust or the band itself.

Adjust the band to allow a little clearance with your wrist to ensure proper

airflow.

When wearing the watch, leave enough room to insert a finger between the band and your wrist.

TO PRESERVE THE QUALITY OF YOUR

WATCH

How to use tri-fold type clasp for leather band (Special clasps)

TO PRESERVE THE QUALITY OF YOUR

Remove the pin from the adjustment hole. Slide the band left and right, and reinsert the pin into the adjustment hole at an appropriate length.

There are 3 types of special clasps as described below; If the clasp of the watch you purchased is one of them, please refer to the indications.

WATCH

A A Type → P.49

B B Type → P.50

C C Type → P.51

A A Type

Lift up the clasp to release the buckle.

Fixed loop

Movable loop

Open the flap.

Buckle

Flap

Adjustment hole

Fasten the flap.

* Do not push the flap in too hard.

* When fastening the clasp, insert the tip of the band

into the movable loop and fixed loop, and then, securely tighten the clasp.

TO PRESERVE THE QUALITY OF YOUR

WATCH

TO PRESERVE THE QUALITY OF YOUR

B B Type

Remove the pin from the adjustment hole.

Slide the band left and right, and insert the pin into the adjustment hole at an appropriate length. Push the buckle and fasten the clasp.

Buckle

Adjustment hole

WATCH

While pressing the push buttons on the both

sides of the flap, lift to open the clasp.

Push button

C C Type

●

How to wear or take off the watch

While pressing the push buttons on the both

sides of the flap, pull the band out of the movable loop and fixed loop. Then open the clasp.

Buckle

Fixed loop

Movable loop

Push button

Flap

Place the tip of the band into the movable loop

and fixed loop, and fasten the clasp by pressing the frame of the buckle.

TO PRESERVE THE QUALITY OF YOUR

WATCH

TO PRESERVE THE QUALITY OF YOUR

●

How to adjust the length of the band

While pressing the push buttons on the both

sides of the flap, pull the band out of the movable loop and fixed loop. Then open the clasp.

Buckle

Press the push buttons again to unfasten the

flap.

Pull the pin out of an adjustment hole of the

band. Slide the band to adjust its length and find an appropriate hole. Place the pin into the hole.

Adjustment hole

Fasten the flap.

TO PRESERVE THE QUALITY OF YOUR

WATCH

Fixed loop

Movable loop

Push button

Flap

TO PRESERVE THE QUALITY OF YOUR

After sales service

●

Notes on guarantee and repair

• Contact the retailer from whom the watch was purchased or SEIKO CUSTOMER SERVICE CENTER for repair or overhaul.

• Within the guarantee period, present the certificate of guarantee to receive repair services.

• Guarantee coverage is provided in the certificate of guarantee. Read carefully and retain it.

• For repair services after the guarantee period has expired, if the functions of the watch can be restored

WATCH

by repair work, we will undertake repair services upon request and payment.

●

Replacement with functional parts

• Please keep in mind that if original parts are not available, they may be replaced with substitutes whose outward appearance may differ from the originals.

Adjustment hole

●

Inspection and adjustment by disassembly and cleaning (Overhaul)

• Periodic inspection and adjustment by disassembly and cleaning (overhaul) is recommended approximately once every 3 to 4 years in order to maintain optimal performance of the watch for a long time. According to use conditions, the oil retaining condition of your watch mechanical parts may deteriorate, abrasion of the parts may occur due to contamination of oil, which may ultimately lead the watch itself to stop. As the parts such as gasket may deteriorate, water-resistant performance may be impaired due to intrusion of perspiration and moisture. Please contact the retailer from whom the watch was purchased for inspection and adjustment by disassembly and cleaning (overhaul). For replacement of parts, please specify “SEIKO GENUINE PARTS.” When asking for inspection and adjustment by disassembly and cleaning (overhaul), make sure that the gasket and push pin are also replaced with new ones.

• When your watch is inspected and adjusted by disassembly and cleaning (overhauled), the movement of your watch may be replaced.

WATCH

TO PRESERVE THE QUALITY OF YOUR

WATCH

How to conduct manual reception (Receive a radio

The antenna is embedded at the 9 o’clock position of the watch. Turning the antenna toward the outside of a window helps improve radio signal reception.

Press and

hold for

3 seconds

Place the watch.

Place the watch where it can easily receive a radio signal. “To improve radio signal reception” → P.23 “Environments in which it is difficult to receive a radio signal” → P.24

The watch cannot receive a radio signal outside the radio signal reception range. “Radio signal reception range indication” → P.18

Continue to press and hold the button for 3 seconds, and then release it when the seconds hand moves to the 0-second position.

Reception starts after the seconds hand moves and stops at the 0-second position.

When the time difference is set for a region other than radio signal reception range, the seconds hand does not move to the 0-second position. (A radio signal cannot be received manually.) Check the time difference set currently. “Setting the time difference (Setting the radio signal transmitting station)” → P.29

Place the watch and wait for a few minutes (max. 12 minutes).

When the seconds hand moves at the one-second interval, the reception is finished.

The seconds hand indicates the reception level. (Updated every minute)

Reception level High : H Low : L

Display

Receiving state of

a radio signal

Easy to receive

Difficult to

receive

* In conjunction with the seconds hand movement, the minute

hand advances by one minute.

The seconds hand indicates the reception result “N.”

Reception result : N

After 5 seconds, the watch switches to the time display mode. “If reception has failed: The seconds hand points to N” → P.27

When the seconds hand starts to move at one-second intervals, check that the reception is successful.

When the reception is finished, check that the reception is successful. “How to display the reception results” → P.26

* During movement of the date, neither the button nor the crown can be operated.

It takes time to receive a radio signal (max. 12 minutes).

* The required time varies depending on the receiving state of a

radio signal.

If the watch is continually used in an environment in which a radio signal cannot be received (a region other than the radio signal reception ranges, etc.), set the time manually. “Radio signal reception range indication” → P.18

When the watch is used in an environment in which a radio signal can be received again, receive a radio signal to set the time. “Automatic reception and manual reception” → P.17 When adjusting the time, the date will be accordingly adjusted.

* Even if a radio signal cannot be received, the watch can be used with the same accuracy as that of a normal quartz watch.

(Average gain/loss ±15 seconds per month)

* When the watch receives radio signals after the time is manually adjusted, it displays the time received from radio signals.

Pull out the crown to the second click

Pull the crown to the second click.

The seconds hand stops on the spot.

When the crown is a screw lock type, unlock it. → P.13

signal manually)

TROUBLESHOOTING

When a radio signal cannot be received

When a radio signal cannot be received, refer to the following pages:

•

Not receivable within the radio signal reception range

Check that the time difference of the area where the watch is used is set. When the time and date are misaligned even after the time difference is correctly selected, refer to

Troubleshooting. “Reception of a radio signal” → P.71

TROUBLESHOOTING

Since a radio signal cannot be received, the time and date became misaligned. In this case, set the time and date manually.

“How to manually set the time” → P.59 “How to manually set the date” → P.61

* For the radio signal reception ranges, refer to “Radio signal reception range indication” → P.18.

When the watch is used outside the radio signal reception range

•

Select the time difference of the area where the watch is used.

“Setting the time difference (Setting the radio signal transmitting station)” → P.29

When the watch does not display the correct time and date even after setting the time difference, manually set the time and date.

■ How to manually set the time

•

01 2

TROUBLESHOOTING

Turn the crown clockwise to advance the time.

Turn the crown counterclockwise to set back the time.

Turn the crown to set the time.

The watch switches to the manual time setting mode. The seconds hand moves to the 0-second position and stops.

The moment the date changes is midnight (12 AM). Please be sure to set the time after ensuring that AM/PM is set correctly. When the watch switches to the manual time setting mode, the reception result data is lost. Therefore, the reception result is indicated as “N”.

Push the crown back in according to the time signal, etc.

The operation is completed. The watch starts to work.

When the crown is a screw lock type, lock it. → P.13

■ How to manually set the date

When the date is not changed automatically due to an environment in which a radio signal cannot be received outside the radio signal reception range, etc. (when changing from a month with 30 days or less to a month with 31 days), set the date manually.

The date can be set independently regardless of the time. When the watch is used in an environment in which a radio signal can be received again, receive a radio signal to set the time. “Automatic reception and manual reception” → P.17

* When the watch receives radio signals after the date is manually adjusted, it displays the date received from radio signals. * If the date remains incorrect even after a successful radio signal reception, the preliminary position of the date may be misaligned.

“Set the preliminary position for the date, and the hour and minute hands.” → P.65

Pull the

crown to the

first click

Press and

hold for

3 seconds

Pull the crown to the first click.

The watch switches to the time difference adjustment mode, and the seconds hand moves to the currently-set time difference. → P.29

When the crown is a screw lock type, unlock it. → P.13

Press and hold button for 3 seconds.

The seconds hand returns to one-second interval movement, and the watch switches to the manual date setting mode.

In the manual date setting mode, the watch will operate.

Turn the crown clockwise to advance the date.

Turn the crown counterclockwise to set back the date.

Turn the crown to set the date.

Push the crown back in.

The operation is completed.

When the crown is a screw lock type, lock it. → P.13

01 2

Turn quickly to move continuously. Turn again to stop moving.

Push the

crown

back in

TROUBLESHOOTING

•

TROUBLESHOOTING

Turn quickly to move continuously. Turn again to stop moving.

TROUBLESHOOTING

Push the

crown

back in

When the date and time are not correct even if the radio signal reception is successful, the preliminary position of the date may be misaligned. The possible causes of misalignment of preliminary position are as follows:

In the case of having a strong impact

the misalignment may occur when dropping or hitting the watch.

In the case of a magnetic influence

the misalignment may occur when bringing the watch close to an object which generates magnetism.

“Examples of common magnetic products that may affect watches” → P.45

* The condition “the preliminary position of hand is misaligned” means that compared to a health meter, “the zero position of a

meter is misaligned, causing a correct weight not to be displayed.”

■ Automatic hand position adjustment function (Adjustment of preliminary positions of hour, minute and seconds hands)

The hour, minute, and seconds hands have an “automatic hand position adjustment function,” which automatically corrects an incorrect preliminary position. Automatic hand position adjustment function activates at 12:00 both for the AM and PM for the hour and minute hands and once a minute for the seconds hand.

* This function works when the preliminary hand position is misaligned due to external factors such as strong impact or magnetic

influence. It does not work to adjust accuracy of the watch or slight deviations which may occur during the manufacturing process.

* The preliminary position of the hour and minute hands can also be manually adjusted.

“Set the preliminary position for the date, and the hour and minute hands.” → P.65

Since the preliminary position of the date is not automatically adjusted, it is necessary to align the position manually. “Set the preliminary position for the date, and the hour and minute hands.” → P.65

TROUBLESHOOTING

Pull out the crown to the second click

Press the

button once

and then

release it

Press the

button

once

The seconds hand moves, and stops at the 0-second position.

Preliminary position

: :

How to set the preliminary position

■ Set the preliminary position for the date, and the hour and minute hands.

The preliminary position of the date is the “1st”. The preliminary positions of the hour and minute hands are “0:00 AM”.

TROUBLESHOOTING

■ Preliminary position adjustment of the date

Pull the crown to the second click.

The seconds hand stops on the spot.

* When the crown is a screw lock type, unlock it.

→ P.13

* Do not turn the crown. Turning the crown switches the

watch to the manual time setting mode, and not the

preliminary position alignment mode. → P.59

TROUBLESHOOTING

Press the button once, then release.

The watch switches to the preliminary position alignment mode for the date.

The seconds hand moves to the 13-second

position. The date moves, and stops at the preliminary position.

* During movement of the date, neither the button nor

the crown can be operated.

01 2

When the preliminary positions are incorrect, the correct time and date cannot be displayed even if the watch receives radio signals. In such a case, by correcting the preliminary positions, the loss or gain of the time or date can be corrected. When the numerical number of the date is not located at the center of the window, it can be corrected by the same procedures as mentioned above.

To correct the preliminary positions, perform the operation on the next page.

Turn the crown to move the date to “1”.

Make sure that the numerical number “1” is located at the center of the date window.

* If “1” is shown, go to step 4.

Continuous

adjustment

Fine

adjustment

If the correct date is not shown, press

the button once.

The watch switches to the preliminary position alignment mode for the hour and minute hands.

The hour and minute hands move, and stop at the 12 o’clock position.

* While the hour and minute hands are moving, the

button and crown cannot be operated.

* If the correct time is shown, go to step 5.

Turn quickly for continuous movement. Turn once more to stop.

Turn intermittently to advance the date slowly.

Turn clockwise to advance 1 step.

Turn counterclockwise to go back 1 step.

TROUBLESHOOTING

When this operation is complete, press

At trouble Possible causes Solutions

Reference

Hand

Movement

The seconds hand moves at two-second intervals.

The energy depletion forewarning function is activated. (P.36) If the seconds hand moves at two- or five-second intervals while you wear the watch everyday, the watch is in a condition where it cannot acquire sufficient light, for instance, the watch is concealed under a long sleeve shirt.

Fully charge the watch so that the seconds hand may move at one-second intervals. Be careful not to conceal the watch under a sleeve, etc., while wearing it. When taking off the watch, place it in as bright a location as possible.

P.34

The seconds hand moves at five-second intervals.

The stopped seconds hand pointing to the 15-second position started operating.

The power save function has been activated. (P.37) When the watch is not exposed to adequate light for a certain period of time, the power save function to limit energy consumption is automatically activated.

Wait until the current time is displayed. No operation is needed. (This is not a malfunction.)

At trouble Possible causes Solutions

Reference

Hand

Movement

The stopped seconds hand pointing to the 45-second position started operating.

Fully charge the watch so that the seconds hand may move at one-second intervals.

After that, if the watch displays the incorrect time, receive a radio wave as needed.

P.17,

P.34

The watch hands advance rapidly unless a button is pressed. After the rapid advancement is completed, the watch resumes its normal movement.

The power save function has been activated. (P.37) The automatic hand position alignment function was activated. (P.64) When the hand positions deviate to display incorrect time as a result of external influences, etc., the watch automatically corrects the hand misalignment by the automatic hand position alignment function.

No operation is needed. (This is not a malfunction.)

At trouble Possible causes Solutions

Reference

Reception

of a radio

signal

The watch is unable to receive a radio signal.

The reception results have failed and the seconds hand points to N (the watch does not receive a radio signal).

The watch was moved while it was receiving a radio signal. (It takes 12 minutes at the longest to receive a radio signal successfully.)

Do not move the watch while it is receiving a radio signal. Because it takes time to receive a radio signal successfully, leave the watch untouched for 12 minutes at the longest.

P.23,

P.57

The watch was left where the radio signal was weak or where it was unable to receive a radio signal. (P.24)

Place the watch where it is able to easily receive a radio signal.

P.23

Transmitting stations may have stopped transmitting radio signals for some reason. (Transmission stop)

Check the website of each transmitting station for further information concerning a transmission stop. Attempt to receive a radio signal again after a while.

P.25

The time difference is set to regions other than the radio signal reception ranges.

1. Check the set time difference and set the correct time difference.

2. When the watch is not displaying the precise time, receive a radio signal again if necessary.

P.17,

P.29

the crown to return.

This ends the preliminary position alignment mode, and the seconds hand, and hours and minute

hands start to move.

When the watch returns to the time display mode,

check if the time and date are correct.

TROUBLESHOOTING

If the time and date are not correct, manually set

them.

Adjusting the time and date by receiving a radio signal

“How to conduct manual reception (Receive a radio signal manually)” → P.56

When the watch is unable to receive a radio signal, refer to

“How to manually set the time” → P.59 “How to manually set the date” → P.61

* When the crown is a screw lock type, lock it. → P.13

01 2

Push the

crown

back in

Troubleshooting

TROUBLESHOOTING

At trouble Possible causes Solutions

Reference

Charging

the solar

battery

The stopped watch was exposed to an adequate light for longer than “the time required to fully charge the watch”, however, it does not resume its normal one-second interval movements.

The amount of exposed light is too weak. The time for charging the watch is not sufficient.

The time required for charging the watch depends entirely on the amount of exposed light the watch receives. Refer to “Guide to charging times” to charge the watch.

P.35

The built-in IC of the watch has fallen into an unstable condition.

Refer to “In case of an abnormal movement” to reset the system.

P.76

Misalignment

of the time

and hand positions

The watch temporarily gains or loses time.

The watch has been left in an extremely high or low temperature place for a long time.

1. When the watch returns to a normal temperature, it will display the precise time as before.

2. If the watch still gains or loses the time, conduct manual reception if necessary.

3. If the watch cannot resume normal movement even after conducting the above mentioned procedures, consult the retailer from whom the watch was purchased.

P.56

TROUBLESHOOTING

At trouble Possible causes Solutions

Reference

Misalignment

of the time

and hand

positions

The reception results are successful, but the precise time is not displayed.

The watch fails to receive a radio signal correctly as a result of external influence. (Incorrect reception)

1. Place the watch where it is able to receive a radio signal more easily.

2. Conduct manual reception if necessary.

P.23,

P.56

The hand positions were misaligned as a result of external influence. The hands are out of the preliminary position as a result of external influence. “Preliminary position” → P.64

1. The automatic hand position alignment function will operate, and these will be corrected. Continue to use the watch normally. The automatic hand position alignment function operates every 12 hours (at 12 AM and 12 PM) for the hour and minute hands, and every minute for the seconds hand. If urgent, perform manual time adjustment.

2. If the watch still gains or loses time, refer to “In case of an abnormal movement” to perform procedures.

3. If the watch cannot resume normal movement even after conducting the above mentioned procedures, consult the retailer from whom the watch was purchased.

P.64,

P.76

The seconds hand position is not correctly aligned in “the reception results display” or “the reception level display.”

The seconds hand is out of the preliminary position as a result of external influence. “Preliminary position” → P.64

At trouble Possible causes Solutions

Reference

Misalignment

of the time

and hand positions

The watch displays an incorrect time hour unit, even though it displays the precise time of minutes and seconds.

The time difference settings are incorrect.

Check the time difference settings, and set these to the local region.

P.29

Misalignment

of the date

The reception results are successful and the precise time is displayed, but the date is not correctly displayed.

The date is out of the preliminary position. This happens when the date is out of the preliminary position as a result of influence of various external sources or after the built-in IC is reset.

Set the date to the preliminary position “1” (the 1st).

P.65

Operation

The crown or button cannot be operated.

The stored electric power is running short.

Sufficiently charge the watch until it starts moving at one-second intervals.

P.34

Hands and date are moving right after a setting is carried out by the crown or button operation.

Wait without doing anything. After the date stops, the crown and button can be operated.

At trouble Possible causes Solutions

Reference

Operation

You get lost in the middle of the operation.

-----------

Return to the status before the start of the operation, and try the operation again.

If the crown is pulled out, push it in. If the crown is not pulled out, then pull it out and push it in again. This will return to one-second interval movement for a maximum of 9 minutes. After this, try the operation again.

Others

Blur on the dial glass persists.

A small amount of water has got inside the watch due to deterioration of the gasket, etc.

Contact the retailer from whom the watch was purchased.

* For the solution of troubles other than the above, consult the retailer from whom the watch was purchased.

TROUBLESHOOTING

In case of an abnormal movement

Pull out the

crown to the

second click

Press and hold the

button for 5 seconds

and then release it

Cal. 7B62 / 7B72

1. Features Basic watch with three hands (Hour, minute and seconds hands), date display

2. Frequency of crystal oscillator

32,768 Hz (Hz= Hertz, cycles per second)

3. Loss/gain (Monthly rate)

Loss/gain ±15 seconds in a monthly rate (Except the cases when the watch is used without time adjustment by receiving a radio signal and when it is worn on the wrist within a normal temperature range between 5 °C and 35 °C)

4. Operational temperature range

Between −10 °C and +60 °C

5. Driving system Step motor (Hour and minute hands, seconds hand, and the date)

6. Power source Secondary battery, 1 piece

7. Duration Approximately 9 months (Fully charged, and the Power Save is not activated)

* If Power Save is activated after it is fully charged, the watch continues to run for approximately

2 years at maximum.

8. Radio signal reception function / radio signal transmitting station

Automatic reception (Before 2:00 AM, 3:00 AM and 4:00 AM)

* It varies depending on the radio signal receiving condition. * After radio signal reception, the watch will start to work depending on the quartz movement

until the next reception.

* Manual reception is available.

9. Integrated circuit Oscillator, frequency divider, drive and reception circuit: IC, 2 pieces

In the case that the watch moves abnormally or that the watch does not move at one-second intervals even after fully charging the battery, then it can be returned to normal operation using the following operation.

■ Reset the system

TROUBLESHOOTING

Pull the crown to the second click.

The seconds hand stops on the spot.

* When the crown is a screw lock type, unlock it.

→ P.13

01 2

Press and hold the button for 5 seconds

and then release it.

After releasing the button, approximately 5 seconds

later the seconds hand moves, and stops at the 0-second position. Then the hour and minute hands will start to move and stop pointing to 12 o’clock 0 minutes.

* The button cannot be operated until all the hands stop.

When all the hands stop pointing to 12 o’clock 0 minutes and 0 seconds, push

the crown back.

The seconds hand starts moving from 12 o’clock 0 minutes and 0 seconds.

* After a system reset, the time difference setting is set to +9 hours (JJY).

After completion of a system reset, perform the following operations.

• “Set the preliminary position for the date, and the hour and minute hands.” → P.65

• “Setting the time difference (Setting the radio signal transmitting station)” → P.29

• “How to conduct manual reception (Receive a radio signal manually)” → P.56

* When the crown is a screw lock type, lock it. → P.13

TROUBLESHOOTING

Specifications

SPECIFICATIONS

* The specifications are subject to change without prior notice due to product improvements.

SEIKO 72B7, 62B7 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual