Seiko 8B54 Operating instructions

1. 基本機能･･････基本時計３針（時・分・秒針）、日付表示、レトログラード曜日表示、

　　　　　　　　小時計２針（時・分針）

2. 水晶振動数････３２，７６８Ｈｚ（Hz=1 秒間の振動数）

3. 精度･･････････平均月差 ±１５秒以内（電波受信による時刻修正が行なわれない場合、

かつ気温５℃～３５℃において腕に着けた場合）

4. 作動温度範囲･･－１０℃～＋６０℃

5. 駆動方式･･････ステップモーター式（基本時計の時分針、秒針、日付、曜日、小時計の時分針 )

6. 使用電源･･････専用二次電池：１個

7. 持続時間･･････約 9 ヶ月（フル充電で、パワーセーブが作動しない場合）

※ フル充電をした状態からパワーセーブが作動した場合は最大約 2 年

8. 電波受信機能･自動受信（午前 2 時、3 時、4 時）

※ 受信状況によって異なる。

※ 受信から次の受信までは上記クオーツの精度で動く

※ 強制受信機能付

9. 電子回路･･････発振、分周、駆動、受信回路：IC　3 個

製品仕様

※仕様は改良のため予告なく変更することがあります。

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※Lengthadjustmentserviceformetallicbandsisavailableat

theretailerfromwhomthewatchwaspurchasedor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.

Thank you very much for choosing a SEIKO watch.

For proper and safe use of your SEIKO watch,

please read carefully the instructions in this

booklet before using.

Keep this manual handy for easy reference.

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Environmentsinwhichitisdi󰮐culttoreceivearadiosignal

… 132

5. Solar Charging Function

　Aboutcharging　 …………………… 134

　　Howtochargethewatch　 …… 134

　　Standardchargingtime　 …… 135

　Aboutenergy　……………………… 136

Energydepletionforewarningfunction

… 136

　　Powersavefunction　 ………… 137

To Preserve the Quality of Your Watch

　Dailycare　 ………………………… 138

　Performanceandtype　 ………… 139

　Waterresistance　………………… 140

　Magneticresistance　…………… 142

　Band　………………………………… 144

Specialclasps

………………………… 146

　Lumibrite　…………………………… 151

　Powersource ……………………… 152

　After-saleservice ………………… 154

7. Troubleshooting

Howtoconductmanualreception(Receivingaradiosignalmanually)

…

156

Whenthewatchisunabletoreceiveradiosignals

… 158



RadiosignalreceptionQ&A

 … 159



Howtomanuallysetthetime

 … 160

Howtomanuallysetthedate

 … 162



Howtomanuallysetthedayoftheweek

… 165

　Preliminaryposition　 …………… 168

　　

AutomaticHandPositionAdjustmentFunction(Functiontoautomatically

adjustthepreliminarypositionofthehourandminutehands)

… 168

Settingthepreliminarypositionofthedate

… 168

Howtocorrectthepreliminarypositions

… 169

Settingthepreliminarypositionofthedate,dayhand,hourandminutehands

… 169

　Attrouble　 ………………………… 174

Incaseofanabnormalmovement

 … 182

　　Howtoresetthebuilt-inIC…… 182

8. Specications

　Specications　 …………………… 188

Contents

1. About This Product

　Handlingcautions　 ………………… 98

　Features　…………………………… 102

Displayandbuttonoperation

　 … 104

　HowtousebuttonB……………… 106

　Screwlocktypecrown…………… 107

2. Before Use

　BeforeUse　………………………… 108

Checkingthechargingstatus

… 108

Checkingthetime,dateandday

 … 109

3. World time function

Howtousetheworldtimefunction

 …… 110

　　Worldtimefunction …………… 110

　

Howtoselectthetimezone(Howtodisplaythe

localtimearoundtheworld)

……………… 112

Timezonedisplayandtimedi󰮏erencetable

　… 114

　Whatisatimezone?　 ………… 116

Q&Afortheworldtimefunction

 … 118

　Aboutdualtimedisplay ………… 119

　Aboutsubdial ……………………… 120

How to Set the Time (Radio Signal Reception)

Settingthetime,dateanddaybyreceivingaradiosignal

… 122

Mechanismofradiosignalreception

 … 122

Automaticreceptionandmanualreception

 … 123

　Aboutreceptionconditions……… 124

Aboutradiosignalreceptionrange

… 124

Radiosignalreceptionrange：JAPAN（JJY）

 … 125

Radiosignalreceptionrange：People’sRepublicofChina(BPC)

… 126

Radiosignalreceptionrange：UnitedStatesofAmerica(WWVB)

… 127

Howtocheckthereceptionresults

　… 128

Aboutreceptionresultdisplay

　… 128

ToImproveradiosignalreception

　… 131

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AboutThisProduct

・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achildswallowsthebatteryoraccessories,immediatelyconsultadoctor,as

itwillbeharmfultothehealthofthebabyorchild.

・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.

To indicate the risks of seriousconsequences such as severe injuries unless the

followingsafetyregulationsarestrictlyobserved.

・Donotremovethesecondarybatteryfromthewatch.

 ※Aboutthesecondarybattery→POWERSOURCEP.15 2

 Replacementofthesecondarybatteryrequiresprofessionalknowledgeandskill.Please

askawatchretailerforreplacementofthesecondarybattery.

 Installationofanordinarysilveroxidebatterycangenerateheatthatcancausebursting

andignition.

Handling cautions

WARNING

・Avoidwearingorstoringthewatchinthefollowingplaces.

○

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ofhighhumidity ○ Placesa󰮏ectedbystrongmagnetismorstaticelectricity

 ○ Dustyplaces ○ Placesa󰮏ectedbystrongvibrations

・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

○Replacementofthemetalbandrequiresprofessionalknowledgeandskill.Pleaseask

awatchretailerforreplacementofthemetalband,asthereisariskofhandornger

injuryandfearoflosingparts.

 ○ 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.

To indicatethe risks of light injuries ormaterialdamages unless the following safety

regulationsarestrictlyobserved.

CAUTIONS

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101

注意

AboutThisProduct

100

AboutThisProduct

WARNING

CAUTION

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specialwatchesfordiving.

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CUSTMERSERVICECENTER(listedontheendofabook).

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

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 leave moisture, sweat and dirt on the

watch for a long time.

Steam,soaporsomecomponentsofahotspringmayaccelerate

thedeteriorationofwaterresistantperformanceofthewatch.

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103

■

Display Function of Radio Signal Reception Results ･･･ The movement of the second hand indicates radio signal reception

results (Yes/No).

■

Display Function of Radio Signal Reception Level ･････ The movement of the second hand indicates the radio signal reception

level during radio signal reception attempts. (Only when the watch is

receiving radio signals by manual operation.)

■

Solar Rechargeable Battery ･･･････････････ A solar cell underneath the dial converts any form of light into “electrical energy”

to power the watch and the power is stored in a secondary battery. Once fully

charged, the watch continues to run for approximately nine months.

■

Energy Depletion Forewarning Function ･･･ The movement of the second hand indicates when the battery should be charged.

■

Power Save Function ･･････････････････････ The Power Save mode is activated when the watch is left without an adequate

light source to reduce energy consumption.

■

Automatic Hand Alignment Function ･･････ A󰮏ected by magnetism or other external sources, when the hand alignments are

deviated, the watch automatically corrects the hand alignments.

AboutThisProduct

Features

102

■ World Time Function ････

→ P.110

■ Dual Time Display ･･････

→ P.119

■

Radio Signal Receiving Function

･･･

→ P.122

This solar radio-controlled watch is equipped with the world time function.

・ By selecting a time zone, the watch can automatically display the

local time in a di󰮏erent time zone around the world.

・

The watch indicates the precise time by automatically receiving radio signals on

o󰮐cial standard frequencies. (The watch can receive o󰮐cial standard frequencies

from Japan, People’s Republic of China and the United States of America.)

・ Two sets of time displays are provided to indicate the local time in

two di󰮏erent time zones at the same time.

AboutThisProduct

By selecting a time zone, the watch can display

the local time in the selected time zone area.

In addition to the main time display, the time in another region can be

displayed in the 24-hour indication format by the sub dial located at

the 6 o’clock position.

The watch maintains the precise time by automatically receiving radio signals on o󰮐cial standard

frequencies. Manual reception of radio signals is also possible. The watch can receive o󰮐cial

standard frequencies of Japan, People

’

s Republic of China and the United States of America.

→ P.128

→ P.157

→ P.134

→ P.136

→ P.137

→ P.168

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105

AboutThisProduct

Standard Frequencies Transmitting Station Display

［Timezoneselection］→P.112

Citynames･･･ 24citiesaroundthe

world

　　　　　････ DaylightSavingTime

［ReceptionResultConrmation］

P.128.

Displaysreceivedradiosignals

･･･JJY（Japan）

･･･BPC（China）

　　･･･

WWVB（TheUnitedStatesofAmerica）

Time Zone Display

104

AboutThisProduct

Display and button operation

Crown

Button A

BUTTON B

→P.10 6

※

Theoperationmethodofthe buttonvaries

withthefunctions beingused. Followthe

instructionsofeachsectionofthisbooklet.

Date

Sub dial

Main Watch

Minute hand

Hour hand

Second hand

Day hand

→P.12 0

20 1

Normalposition: Howtoselectthetimezone p.112

 Checkingthereceptionresult p.128

 Manualreception p.156

Firstclick:

Manualdatesetting

 p.162

 Manualdaysetting

 p.165



Timesettingforsubdial

 p.120

Secondclick:Manualtimesetting p.160

Resettingthebuilt-inIC p.182

※

Ifyourwatchhasascrewlocktypecrown,keep

itlockedwhileyouarewearingthewatch.

　→ScrewlocktypecrownP.107

Display of Radio Wave Reception Result

Display of Radio Wave Reception Level

H… Highreceptionlevel

　　（50-secondposition）

L… Lowreceptionlevel

　　（40-secondposition）

N…

Unabletoreceiveradiosignals

　　（20-secondposition）

【Manual reception】

　→P.15 6

【Checking the reception results】

　→P.12 8

Y…

ReceptionSuccessful

(10-secondposition).

N…Receptionfailed

(20-secondposition).

※Indicationonthebezelorpositionsofeachitemonthedial

mayvarydependingonthemodel(design).

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107

※Whenlockingthecrown,turnitslowly withcare,ensuringthatthescrewisproperlyengaged.Be

carefulnottoforciblypushitin,asdoingsomaydamagethescrewholeinthecase.

AboutThisProduct

Appearance

Upperhalfofthe

ButtonBiscovered.

ButtonBhasan

outerring.

Button B is covered except the

hollowinthemiddleofthebutton.

ButtonBisembedded

inthewatchcase.

Howto

press

Useanobjectwith

alongtaperedtip.

① 

Turn the outer ring

counterclockwise (to a

downwarddirection)toloosenit.

② 

Press thebutton with

yournger.

Pressthebuttonusinganobject

withalongtaperedtip.

106

ボタン A、B についてHow to use button B

To prevent accidental input and to optimize design, some models may have a Button B, which

cannot be easily pressed with your nger. Refer to the table below on how to press the Button B.

※Typ esofbuttonsdi󰮏erdependingonthedesignofthewatch.

※

You can also press the

lowerhalf ofthebutton

withyournger.

Outerring

※

After finishing the

operation, make sure to

relock the outer ring by

turningitclockwise.

①

Loosen

②

Press

AboutThisProduct

Screw lock type crown

The watch features a screw-lock mechanism that can securely lock the crown when they are not

being operated in order to prevent any operational errors and to improve its water resistant property.

●

It is necessary to unlock the screw lock type crown before operating it.

● Once you have nished operating the crown, make sure to relock it.

【Tounlockthecrown】

Turnthecrowncounterclockwise

（downward）tounscrewit.

Nowthecrowncanbeoperated.

【Tolockthecrown】

Turnthecrownclockwise（upward）

whilegentlypressingitintowardthe

watchbodyuntilitstops.

Crownlocked Crownunlocked

Unlockthecrownbefore

operatingit.

Unscrew

Afteroperatingthe

crown,lockit.

While pressing the

crown in

Screw

BSB8B54 p095-188 欧文.indd 106-107 19.11.6 11:31:30 AM

109

BeforeUse

Checking the time, date and day

※

Thehandsofthiswatchcannotbemovedbyturningthecrown.Sowhenadjusting

thetime,dateandday,refertothefollowingpagesregardingtheprocedures.

108

BeforeUse

Checking the charging status

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

Thesecondhandmoves

atone-secondintervals.

Thesecondhandmoves

attwo-secondintervals.

Thesecondhandmoves

atve-secondintervals.

Thewatchis

su󰮐cientlycharged.

※

Ifthesecondhanddoesnotmoveatone-secondintervalsevenafterfullychargingthebattery→　"Chargingthesolarbattery"inTroubleshootingonP.176

Before use

Theenergydepletionforewarning

functionisactivated. → P.136

Chargethebatterysu󰮐ciently.

Thepowersavefunctionisactivated.→ P.137

Checkthemovementsofthesecondhandafter

releasingthepowersavemode.

Thewatchcompletelystopsoperating.

Asthechargedenergyisdepleted,

chargethebatterysu󰮐ciently.

Howto

charge

the

battery

→P.134

Thesecond

handisstopped.

Whenthetime,date

anddayarecorrect

Whentheradio

signalcanbe

received

Usethewatchwithout

adjustment.

Whenether

time,dateor

dayisincorrect

Whenaradio

signalcannot

bereceived

Howtosetthe

timezone→

P.112

Settingthetime,date

anddaybyreceivinga

radiosignal→P.156

Manuallysetthetime

→P.160-161

Manuallysetthedateandday

→ P.162-167

Radiosignalreceptionrangeindication→P.124

Environmentsinwhichitisdi󰮐culttoreceivearadiosignal→P.132

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111

<Beforetimezonesetting>

Mainwatch:localtime(Tokyo)

Subdial:hometime(Tokyo)

LocaltimeinJapan:6th.,Monday.10o’clock8minutesand42seconds

LocaltimeinHonolulu:5th.,Sunday,15o’clock8minutesand42seconds

<Aftertimezonesetting>

Mainwatch:localtime(Honolulu)

Subdial:hometime(Tokyo)

Example: How to display the local time in Honolulu (How to set the time zone to HNL (Honolulu))

When the time zone is selected, the date and day of the week are automatically adjusted in conjunction with the time of the main watch.

The time of the sub dial remains unchanged. → About sub dial P.120

Worldtimefunction

How to use the world time function

110

■ World time function

→ How to select the time zone P.112 → Time zone display and time di󰮏erence table P.114

･

If the time zone is set to Japan, China or the United States, the watch displays the precise time, date and day of

the week by receiving radio signals, provided that the watch is within the radio signal reception range.

WhenusingthewatchinJapan,setthetimezoneto[TYO(Tokyo)]sothatthewatchcanreceiveradiosignalsofJapan.

WhenusingthewatchinChina,setthetimezoneto[BJS(Beijing)]sothatthewatchcanreceiveradiosignalsofChina.

WhenusingthewatchintheUnitedStates,setthetimezonetoeither[LAX(LosAngels)],[DEN(Denver)],[CHI(Chicago)]

or[NYC(NewYork)],sothatthewatchcanreceiveradiosignalsoftheUnitedStates.

In theTime Zone Setting mode,

the second hand indicates the

selectedtimezone.

Sub dial

Main watch

Timezoneindication

・

The main watch can be easily set to display the local time in a di󰮏erent time zone by selecting a time zone

among 24 regions around the world.

※

Thewatchisunabletoreceiveradiosignalsoutsidethereceptionrange. →RadioSignalReceptionRangeP.12 4

Worldtimefunction

BSB8B54 p095-188 欧文.indd 110-111 19.11.6 11:31:30 AM

113

Within 10 seconds after the movement of

the hour and minute hands stop, the watch

automatically exits the Time Zone Setting mode.

 Thesecondhandstartstomove.

　 

The watch automatically adjust the

dateanddayoftheweekasnecessary.

※While thedate and day of the week are

moving,neitherthebuttonsnorthecrown

canbeoperated.

Set the Daylight Saving Time

(DST) as necessary.

TimezoneindexforPAR(Paris)

Time zoneindex for PAR(Paris)

whiletheDaylightSavingTimeis

beingobservedinParis.

Worldtimefunction

TosettheDaylightSavingTime,selectthetimezone

indexnexttothetargettimezone(+1hour),whichis

indicatedbythearrowunderthetimezoneindex.

<Example>When theDaylightSavingTimeisbeingobservedinParis,setthe

secondhandtopointatthenexttimezoneindexCAI,asindicatedbythearrow.

How to select the time zone (How to display the local time around the world)

112

Within 10 seconds after procedure ① is completed, start the operation of procedure ②.

※Ifthewatchisleftuntouchedfor10secondsafterthesecondhandstops,thewatchautomatically

returnstotheTIMEdisplaymode.Ifthishappens,restarttheoperationfromprocedure①.



Witheachpressingofthebutton,thesecondhandmovestothe

adjacenttimezoneindex.

Within 10 seconds after carrying out the procedure

1, press the Button A or B to set the second hand

to point at the target time zone index.

※

To press the

Button B, use

an object with

a long tapered

tip.→P.10 6

Keep pressing down the Button B (for 4

seconds) until the second hand stops.



Thesecondhandstartstomoveandstops

pointingtothecurrentlyselectedtimezone.

Worldtimefunction

BSB8B54 p095-188 欧文.indd 112-113 19.11.6 11:31:31 AM

115

※ Thetimezoneswitha△markinthereceivableradiosignalscolumnarethetimezoneswhichshould

beselectedwhiletheDaylightSavingTimeisbeingobservedinTokyo(Japan)orNewYork(USA).

※ Eachindicationmaydi󰮏erdependingonthemodel（design）ofthewatch.（AsofApril2014）

DaylightSavingTime(SummerTime)isine󰮏ectintimezonesindicatedwitha“ ★“ mark.(AsofJuly2010)

Indication on

the bezel

Second hand

positions

Names of representative

cities (Time Zone)

Time difference

from UTC

Receivable

radio signals

WLG

30-secondposition

★ Wellington +12hours －

ー

32-secondposition

(DSTinWellington) +13hours －

MDY

33-secondposition

　MidwayIslands － 11hours －

HNL

35-secondposition

　Honolulu － 10hours －

ANC

38-secondposition

★ Anchorage － 9hours －

LAX

40-secondposition

★ LosAngels(USA) － 8hours WWVB

DEN

43-secondposition

★ Denver(USA) － 7hours WWVB

CHI

45-secondposition

★ Chicago(USA) － 6hours WWVB

NYC

48-secondposition

★ NewYork(USA) － 5hours WWVB

SCL

50-secondposition

★ Santiago － 4hour WWVB△

RIO

53-secondposition

★ RiodeJaneiro － 3hours －

ー

55-secondposition

（DSTinRiodeJaneiro）－ 2hours －

PDL

58-secondposition

★ Azores － 1hour －

Worldtimefunction

Time zone display and time di󰮏erence table

114

Indication on

the bezel

Second hand

positions

Names of representative

cities (Time Zone)

Time difference

from UTC

Receivable

radio signals

UTC/LON

0-secondposition

★ London/UTC

0hours

－

PAR

3-secondposition

★ Paris/Berlin

+1hours

－

CAI

5-secondposition

★ Cairo

+2hours

－

JED

8-secondposition

　JEDDAH

+3hours

－

DXB

10-secondposition

　Dubai

+4hours

－

KHI

13-secondposition

　Karachi

+5hours

－

DAC

15-secondposition

　Dhaka

+6hours

－

BKK

17-secondposition

　Bangkok

+7hours

－

BJS

19-secondposition

　Beijing（China）

+8hours

BPC

TYO

23-secondposition

　Tokyo(Japan)

+9hour

JJY

SYD

25-secondposition

★ Sydney

+10hours

JJY△

NOU

28-secondposition

　Nouméa

+11hours

－

IntheTimeZoneSettingmode,setthesecondhandtopointatthetargettimezoneindexreferringtothetablebelow.

ThearrowindicatesexamplesoftheshiftsoftimezoneindexwhiletheDaylightSavingTimeisbeingobserved.

TosettheDaylightSavingTime,selectthetimezoneindexnexttothetargettimezone(+1hour),whichisindicatedbythearrowunderthetimezoneindex.

Worldtimefunction

BSB8B54 p095-188 欧文.indd 114-115 19.11.6 11:31:31 AM

117

Worldtimefunction

MEMO

116

■ What is a time zone?

Worldtimefunction

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

di󰮏erence around the world as 24 hours.

In addition, Daylight Saving Time (Summer Time) is individually adopted in some regions.

[WhatisUTC(CoordinatedUniversalTime)?]

 UTC is theuniversal standard time coordinatedthroughinternationalagreement.It

is used as the official time around the world.UTC is determined by adding a leap

second to GMT (Greenwich Mean Time), whichis determinedthrough astronomical

measurement,inordertokeeptheprecisetime.

[Whatissummertime(DST)?]

 

Summer time is daylight saving time.Advancing 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varydependingonthecountry.

※

Timedi󰮏erencesbetweenregionsanddaylightsavingtimemaychangeduetocircumstancesofacountryorregion.

※ 

Insomeregions,timezonesthatdi󰮏erfromUTCbyhalf-orquarter-hourtimedi󰮏erencesareestablished.(Forexample,somepartsofIndia.)

BSB8B54 p095-188 欧文.indd 116-117 19.11.6 11:31:31 AM

About dual time display

119

Equipped with the main watch and sub dial, the watch can simultaneously

indicate the local times in two regions.

Example: How to display the local time in Honolulu by the main watch,

and the local time in Japan by the sub dial.

Worldtimefunction

118

Worldtimefunction

Ｑ :WillthewatchbeautomaticallysettothelocaltimewhenitismovedtoaplaceoutsideJapanin

adi󰮏erenttimezone?

Ａ :Thewatchwillnotbeautomaticallysettothelocaltimeifitisjustmovedtoaplaceoutside

Japaninadi󰮏erenttimezone.Selectthetimezonewhereyouarewhenyouareabroad.

　Ifyouselectthetimezone,thewatchisautomaticallysettothelocaltime.

　（Thetimedi󰮏erencecanbeadjustedinincrementsof1hourbasedontheJapanStandard

Time.）

　Afterselectingthetimezone,ifitiswithinthereceptionrangeofradiosignals,youcanleave

thewatchtoreceivetheradiosignaltosetittotheprecisetime.

　（Thereceivablestandardfrequencycanbechangedbyselectingatimezone.）

Ｑ :DaylightSavingTimeinformationshouldbecontainedinastandardfrequency.Isn'titnecessary

tosetsummertimemanuallyifthetimezonewithintheradiosignalreceptionrangeisproperly

selected?

Ａ : 

SomeareasorcountriesinatimezonemaynothaveadoptedDaylightSavingTime.

　

ThereforethewatchisdesignedsothatDaylightSavingTimecanbemanuallyselected.

Q：

Maintainingthemainwatchunderhometime（timeofresidingarea）,isitpossibletoallowthesubdial

todisplaylocaltime（localtimeineachtimezonearoundtheworld）?

A：

Thesubdialcanbeadjustedtoanydiscretionarytime.　Referto"Howtosetthesubdial"onP.120.

Q & A for the world time function

Main watch: Local time (Honolulu)

Sub dial: Home time (Japan)

Japantime:10o’clock8minutes(24-hour

indicationformat)

→　AboutsubdialP.12 0

Honolulutime( －19hours):15o’clock8minutesand42seconds

Date:5th.

Dayoftheweek:Sunday

BSB8B54 p095-188 欧文.indd 118-119 19.11.6 11:31:32 AM

121

Press the Button B to set

the time.

Toadvanceoneminute

Pressthebuttononceandrelease.

Toadvance

rapidly

Keeppressingdownthebuttonforlongerthan2seconds.

Pressthebuttononceagaintostop.

Push the crown back.

Theoperationisnowcompleted.

※Relockthecrown.

→P.10 7

※PresstheButtonBwithyourngeror

withanobjectwithalongtaperedtip.

→P.10 6

Worldtimefunction

012

120

Pull out the crown to the rst click.

Thesecondhandrotatesuntilitpointstothe30-second

positionandstops.

Thewatchentersthetimesettingmodeforsubdial.

Boththemainwatchandthesubdialcontinuetooperate.

■ How to set the sub dial

About sub dial

・ The sub dial displays time in the

24-hour indication format.

・ Even if the time zone of the

main watch is changed, the time

indicated on the sub dial remains

unchanged.

Sub dial operates independently of the

mainwatch.

※Unlockthe

crown.

→P.10 7

Worldtimefunction

012

BSB8B54 p095-188 欧文.indd 120-121 19.11.6 11:31:32 AM

123

HowtoSettheTime(RadioSignalReception)

122

HowtoSettheTime(RadioSignalReception)

The radio-controlled watch displays the precise time, date and day by automatically

receiving and synchronizing itself with the radio signal of an o󰮐cial standard frequency.

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.

Transmitting

Station

Cesium

AtomicClock

Radio-controlledwatch

Receiveradiosignalsthroughthe

antennainsidethewatch

↓

Analyzetimeinformation

↓

Displaythecurrenttime,dateandday

O󰮐cialstandard

frequency

■ Mechanism of radio signal reception

Setting the time, date and day by receiving a radio signal

※

IfthetimezoneissettoaregionotherthanJapan,ChinaortheUnitedStates,thesignalreceptionfunctionwillnotwork.→TimeZone

DisplayandTimeDi󰮏erenceTabl eP.114

※

RadioSignalreceptionresultsdependonareceivingcondition.→Environmentsinwhichitisdi󰮐culttoreceivearadiosignalonP.13 2

※

Thiswatchisunabletoreceiveradiosignalsoutsideareceptionrange→RadiosignalreceptionrangeindicationonP.12 4

※

Whenthewatchisnotdisplayingtheprecisetime,dateanddayevenaftersuccessfullyreceivingaradiosignal→Inthiscase,referto

Troubleshooting:MisalignmentofthetimeandhandsonP.17 8andMisalignmentofthedateanddayonP.18 0.

・Manual reception

When this watch cannot automatically receive a radio signal due to a difficult

receiving environment, it is possible to receive them arbitrarily at any time.

　→ How to conduct manual reception　P.156

・Automatic reception

This watch sets the time, date and day by automatically receiving a radio signal at a xed

time. This watch automatically receives a radio signal at 2:00 AM, 3:00 AM and 4:00 AM.

■ Automatic reception and manual reception

※Whenthewatchsuccessfullyreceivesaradiosignal,itwillstopautomaticreception.

・

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

・While the watch is receiving radio signals, do not move it.

→ To Improve Radio Signal Reception　P.131

BSB8B54 p095-188 欧文.indd 122-123 19.11.6 11:31:32 AM

125

■ Radio signal reception range：JAPAN（ＪＪＹ）

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di󰮏erentfrequency.

Fukushima(Ohtakadoya-yamatransmittingstation:40KHz)

Kyushu(Hagane-yamatransmittingstation:60KHz)

The reception range from each transmitting station is

approximately1,000km(1,000kmradiusofeachstation).

When the time zone is set to [TYO (Tokyo)], the watch can receive radio

signals of Japan.

※Iftheconditionisgoodinarangebeyond

1,000km,therecanbethecasethatthe

watchcanreceiveradiosignals.

※

Even withinthe radio signal receptionrange, radio

signalreceptionmaybeobstructeddependingonthe

receptionconditionssuch asweather,geographical

features,surroundingbuildingsordirections.

→

Conditionsinwhichthewatchmaybe

unabletoreceiveradiosignalsP.132

HowtoSettheTime(RadioSignalReception)

124

About reception conditions

This watch can receive o󰮐cial standard frequencies of Japan (two stations), People’s Republic of China, and the United States of America.

When you set the watch to a time zone in Japan, China or the United States, the o󰮐cial standard frequencies the watch receives will be

automatically changed accordingly to the selected time zone.

→SettingtheTimeZoneP.112

Japan（JJY）

P.12 5

UnitedStates

ofAmerica

（WWVB）P.12 7

C h i n a（ B P C ）

　　　P.12 6

■ About radio signal reception range

HowtoSettheTime(RadioSignalReception)

Ohtakadoya-

yamatransmitting

station（40kHz）

Hagane-yama

transmitting

station（60kHz）

1,000km

BSB8B54 p095-188 欧文.indd 124-125 19.11.6 11:31:33 AM

1,500km

127

WWVBisoperatedbyNIST.

FortCollinsradiostation(60KHz),

Denver,Colorado

※NIST：NationalInstituteofStandards

　andTechnology

■

Radio signal reception range：United States of America (WWVB)

When the time zone is set to either [LAX (Los Angels)], [DEN (Denver)], [CHI (Chicago)]

or [NYC (New York)], the watch can receive radio signals of the United States.

※Iftheconditionisgoodinarangebeyond

1,5 0 0km,therecanbethecasethatthe

watchcanreceiveradiosignals.

※

Even withintheradio signal receptionrange, radio

signalreceptionmaybeobstructeddependingonthe

receptionconditionssuchasweather,geographical

features,surroundingbuildingsordirections.

　→

Conditions in which the watch may be

unabletoreceiveradiosignalsP.132

Thereceptionrangefromthe

transmittingstationisapproximately

1,500km(1,500kmradiusofFort

Collinsradiostation).

FortCollins

transmitting

station

（60KHz）

HowtoSettheTime(RadioSignalReception)

126

BPCisoperatedbyNTSC,ChineseAcademy

ofSciencesNationalTimeServiceCenter.

ShangqiuCity,HenanProvince

Shangqiu Low-Frequency Time-Code Time

ServiceStation(68.5kHz)

※ N T S C：N a t io na l TimeServiceCenter

When the time zone is set to BJS (Beijing), the watch can receive radio

signals of China.

■

Radio signal reception range : People’s Republic of China (BPC)

※

Iftheconditionisgoodinarangebeyond1,5 0 0km,there

canbethecasethatthewatchcanreceiveradiosignals.

※

Even within the radio signal reception range, radio

signal receptionmay beobstructeddependingon the

receptionconditions such as weather,geographical

features,surroundingbuildingsordirections.

→Conditionsinwhichthewatchmaybeunableto

receiveradiosignalsP.13 2

Shangqiu

NationalTime

ServiceCenter

Frequency:

68.5kHz

約 1,500km

The reception range from the transmitting

stationisapproximately1,500km(1,500km

radiusofShangqiutransmittingstation).

HowtoSettheTime(RadioSignalReception)

BSB8B54 p095-188 欧文.indd 126-127 19.11.6 11:31:33 AM

129

Check which transmitting station the watch has received

the latest radio signals from (within 3 seconds).



Thesecondhandpointstothestationindicatorfromwhichthewatchreceivedtheradiosignals.

※ When 3 seconds have

elapsedoriftheButton

Aispressed,thewatch

returns to the TIME

displaymode.

BPC(China)

19-second

position

JJY(Japan)

23-second

position

WWVB(USA)

43-second

position

HowtoSettheTime(RadioSignalReception)

128

The second hand indicates the latest radio signal reception results (Yes/No) for ve seconds, and

then indicates the transmitting station from which the watch received the latest radio signals.

■ About reception result display

Press the Button A once

and release it.

How to check the reception results

Ifthereceptionfailed：N

(the 20-second position)

Ifthereceptionwassuccessful：Y

(the 10-second position)

Thesecondhandindicatesthe

receptionresults.

Check if the reception was

successful (within ve seconds).

BPC

JJY

※ 

When5 seconds haveelapsedoriftheButton Ais

pressed,thewatchreturnstotheTIMEdisplaymode.

When5secondshaveelapsed,thesecondhandstartstomove.

HowtoSettheTime(RadioSignalReception)

※

When the Button A is

keptpressed,thewatch

enters the manual

receptionmode.

BSB8B54 p095-188 欧文.indd 128-129 19.11.6 11:31:34 AM

131

Antenna

HowtoSettheTime(RadioSignalReception)

130

・ 

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,dateanddayoftheweek.

　Howtomanuallysetthetime →P.160

　Howtomanuallysetthedate →P.162

　Howtomanuallysetthedayofthewe ek →P.165

HowtoSettheTime(RadioSignalReception)

If reception has failed: The second 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inuenceofweather,geographical

features,buildings,ordirection）.→Inthiscase,refertoEnvironmentsinwhichitis

di󰮐culttoreceivearadiosignalonP.132.

Thiswatchisunabletoreceiveradiosignalsoutsideareceptionrange→Radio

signalreceptionrangeindicationonP.124

・

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

IfthetimezoneissettoaregionotherthanJapan,ChinaortheUnitedStates,thesignalreception

functionwillnotwork.Checkthetimezonesetting→HowtoselectthetimezoneonP.112

・

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

Receivingenvironmentsdi󰮏er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.

・

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



※

Whenthewatchisnotdisplayingtheprecisetime,dateanddayevenaftersuccessfullyreceivingaradiosignal

→Inthiscase,refertoTroubleshooting:Misalignmentofthetimeandhandsonpage178andMisalignmentofthedateanddayonP.18 0 .

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

■ To Improve radio signal reception

※

Ifthebuttonorcrownisoperatedwhilethewatchisreceivingaradiosignal,thereceptionwillbecancelled.

・

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

※Locationsoftransmittingstations→RadioSignalReceptionRangeIndicationP.125 -127

・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.

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.

BSB8B54 p095-188 欧文.indd 130-131 19.11.6 11:31:34 AM

133

 Japan　：NICT(JapanStandardTimeGroup)http://www.jjy.nict.go.jp/

 China　：NTSC　http://www.ntsc.ac.cn

 TheUnitedstatesofAmerica：NIST　

 http://www.nist.gov/physlab/div847/grp40/wwvb.cfm

・Websitesoftransmittingstations(asofJuly2010)

HowtoSettheTime(RadioSignalReception)

132

HowtoSettheTime(RadioSignalReception)

■ Environments in which it is di󰮐cult to receive a radio signal

・Close to home electrical

appliances such as TV's,

refrigeratorsorairconditioners

・Close to OA devises 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tra󰮐c.

・Close to overhead

power lines, TV

stations,traincables.

・Inside abuilding, between tall

buildings,underground.

・Insideavehicle,train,orairplane

Avoid putting the watch

in such places when it

receives radio signals.

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each

transmittingstationorbecauseof alightningstrike.Insuch acase,seeeachstation's

websiteforfurtherinformationorcontactSEIKOCUSTOMERSERVICECENTER.

BSB8B54 p095-188 欧文.indd 132-133 19.11.6 11:31:34 AM

135

Illumination

1x(LUX)

Light

source

Condition

(Example)

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runforoneday

500　

Incandescentlight

60W60cm －－

6hours

700　

Fluorescentlight

Generalo󰮐ces －－

4hours

1000　

Fluorescentlight

30W70cm － 40hours　

3hours

3000　

Fluorescentlight

30W20cm 230hours　 6hours　

1hours

5000　

Fluorescentlight

30W12cm 150hours　 4hours　

35minutes

10000　

Fluorescentlight

30W5cm 60hours　 1.5hour　

15minutes

10000　

Sunlight

Cloudyday 60hours　 1.5hour　

15minutes

100000　

Sunlight

Sunnyday

(Underthedirectsunlightonasummerday)

30hours　 30minutes　

3minutes

SolarChargingFunction

134

SolarChargingFunction

■ How to charge the watch

About charging

Expose the dial to light to charge the watch.

※Whenchargingthewatch,makesurethatthewatchisnotheatedtoahightemperature.(The

operationaltemperaturerangeisbetween-10ºCand+60ºC.)

※Whenrst usingthewatchorstartingto usethewatchafterithasstoppedbecauseof the

energydepletion,su󰮐cientlychargethewatchreferringtothetableonthepageattheright.

Toensureoptimalperformanceofthewatch,makesure

thatthewatchiskeptsu󰮐cientlychargedatalltime.

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.

・

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

time.

Thegures 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su󰮐cientchargingtime.

※Thesecondhandmovementindicatestheremainingamountofenergy.

　"checkingtheChargingStatus"P.10 8

※Therequiredchargingtimeslightlyvariesdependingonthemodelofthewatch.

■ Standard charging time

For an approximate time required to charge the watch, refer to the table below.

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137

PowerSave1 PowerSave2

Condition

Whenthewatchisexposedtoastatewithoutreceivingan

adequatelightsourcefor72hoursorlonger.

Whenthewatchisinaninsu󰮐cient

chargingstateforalongtime.

Situation

Howtohandle

thesituation

Whenthewatchisexposedtoanadequatelightsourceforvesecondsorlonger,it

displaysthecurrenttimeagainafterthesecondhandisrapidlyadvanced.

Aftersu󰮐cientlychargingthebattery,setthe

watchforthecurrenttime,ifnecessary.

SolarChargingFunction

136

SolarChargingFunction

The energy depletion forewarning function is activated when the energy

stored in the watch runs low. In such a case, the second 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

su󰮐ciently.

※Neitherthebuttonsnorthecrowncanbeoperatedwhilethesecondhandmovesattwo-secondor

ve-secondintervals(thisisnotamalfunction).

※Whilethesecondhandmovesatve-secondintervals,thehourandminutehands,stopoperating.

※Whilethesecondhandmovesatve-secondintervals,thewatchisunabletoreceiveradiosignals

automatically.Afterthewatchischargedsu󰮐cientlyandthesecondhandreturnstonormalone-

secondintervalmovement,conductthemanualreceptionofradiosignalstosetthewatchtothe

correcttime.(RefertoAutomaticReceptionandManualReceptiononP.123.)

How to charge the watch ･･････････　P.134

Standard charging time ････････････　P.135

■ Energy depletion forewarning 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.

PowerSave2

※ Whilethewatchisbeingcharged,thesecondhandmovesat“Five-secondIntervals.”

　Duringthe“Five-secondIntervalMovement,”neitherthebuttons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su󰮐cientlychargingthebattery,setthecurrenttimeby

receivingaradiosignal.(RefertoAutomaticReceptionandManualReception→P.12 3)

The second hand

stops pointing at the

15-secondposition,and

the hour and minute

handsalsostop.

The watch conducts

automatic radio signal

receiving.

■ Power save function

The second hand

stops pointing at the

45-secondposition,and

the hour and minute

handsalsostop.

The watch does not

conduct automatic

radiosignalreceiving.

※Therearetwotypesofpowersavemode.

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139

ToPreservetheQualityofYourWatch

138

ToPreservetheQualityofYourWatch

● The watch requires good daily care

 ・Donotwashthewatchwhenitscrownisat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.

 　※If your watchis ratedas“non-waterresistant” or“waterresistantfor daily

use,”donotwashthewatch.

  　　Performanceandtype　→　P.139.

  　　Waterresistance　→　P.140.

● 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locktypecrown.

　 (Noneedtopulloutthescrewlocktypecrown.)

　 Screwlocktypecrown　→　P.107

Daily care

※Thefigureaboveisoneexample.Performanceofyourwatchisdifferentfromabovesample.

The case back shows the caliber and performance of your watch

Performance and type

Calibernumber

Thenumbertoidentify

thetypeofyourwatch

Waterresistant

performance

RefertoP.14 0

Magneticresistant

performance

RetertoP.14 2

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141

Conditionofuse

Avoiddropsofwaterorsweat

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.

Notsuitablefor

swimming

WARNING

ToPreservetheQualityofYourWatch

140

Indicationonthecaseback

Waterresistantperformance

Noindication

　Non-waterresistance

WATERRESISTANT 　Waterresistanceforeverydaylife　

WATERRESISTANT

5BAR

　Waterresistanceforeverydaylifeat

　5barometricpressures

WATERRESISTANT

10（20）BAR

　Waterresistanceforeverydaylifeat

　10(20)barometricpressures.

ToPreservetheQualityofYourWatch

Refer the table below for the description of each degree of

water resistant performance of your watch before using.

（Referto"P.139"）

Water resistance

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143

ToPreservetheQualityofYourWatch

142

A󰮏ected by nearby magnetism,

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

※

Whenthehandpositionsdeviatetodisplayincorrecttimeasaresultofinuenceofmagnetism.

thiswatchautomaticallycorrectsthehandalignmentitself.(Refertop.16 8)

Indicationonthecaseback

Conditionofuse

Noindication

Keepthewatchmorethan10cmawayfrom

magneticproducts.

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)

Magnetic resistance

ToPreservetheQualityofYourWatch

Ifthewatchbecomesmagnetizedanditsaccuracydeterioratestoanextentexceedingthespecied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watchisa󰮏ectedbymagnetism

Thebuilt-inmotorisprovidedwithamagnet,whichmaybeinuencedbyastrongexternalmagneticeld.

Examples of common magnetic products that may a󰮏ect watches

Cellularphone

(speaker)

Bag

(withmagnetbuckle)

AC-powered

shaver

Portableradio

(speaker)

Magnetic

cookingdevice

Magnetic

healthpillow

Magnetic

necklace

ACadapter

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145

ToPreservetheQualityofYourWatch

144

ToPreservetheQualityofYourWatch

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causeayellowishorgoldstainonthelowersleeveedgeofshirts.

・Wipeo󰮏moisture,sweatorsoilwithasoftclothassoonaspossible

・Tocleanthesoilaroundthejointgapsoftheband,wipeitoutinwaterandthenbrushito󰮏witha

softtoothbrush.

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

・Because sometitan bracelets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o󰮏thebracelet,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.

Band

● Leather band

・

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

・

Wipeo󰮏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.

・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waterresistant）.

● 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o󰮏withadrycloth.

　

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

・

Whenthebandbecomeslessexible,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the

lengthoftheband

Notesonskin

irritationandallergy

Skinirritationcausedbyabandhasvariousreasons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airow.Whenwearingthewatch,leaveenough

roomtoinsertangerbetweenthebandandyourwrist.

BSB8B54 p095-188 欧文.indd 144-145 19.11.6 11:31:38 AM

147

1 2

※Whenfasteningtheclasp,insertthetipofthebandintothemovable

loopandxedloop,andthen,securelytightentheclasp.

ToPreservetheQualityofYourWatch

146

A B

ToPreservetheQualityofYourWatch

There are 3 type of special clasps as described below;

If the clasp of the watch you purchased is one of them,

please refer to the indications.

Special clasps

A Type

　→P.147

B Type

　→P.148

C Type 　

→P.150

A Type

Liftuptheclasptoreleasethe

buckle.

Opentheap.

Takethepinoutoftheadjustmenthole,

adjustthe sizeofthe strapby slidingit

backandforth,andthenputthepinback

intotheappropriateadjustmenthole.

Closetheap.

※Donotpushtheapintoohard.

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3 4

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ToPreservetheQualityofYourWatch

B Type

・How to wear or take o󰮏 the watch

Pressthe buttonon bothsides ofthe ap; pull

thebuckleup.

Thebandwillautomaticallycomeoutoftheloop.

Placethetipofthebandintothemoveable

loopandfixed loop, and fastentheclasp

bypressingtheframeofthebuckle.

・How to adjust the length of the leather band

With pressingbuttons on both sides ofthe

ap,pulltheleatherbandoutofthemoveable

loopandxedloop.Thenopentheclasp.

Press the push buttons again to

unfastentheap.

Pullthepinoutofaadjustmentholeoftheband.

Slide thebandto adjust its length and findan

appropriatehole.Placethepinintothehole.

Fastentheap.

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151

Condition Illumination

Sunlight

Fineweather 100,000lux

Cloudyweather 10,000lux

Indoor(Window-side

duringdaytime)

Fineweather morethan3,000lux

Cloudyweather 1,000to3,000lux

Rainyweather lessthan1,000lux

Lightingapparatus

(40-wattdaylight

uorescentlight)）

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

ToPreservetheQualityofYourWatch

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1 2

ToPreservetheQualityofYourWatch

C Type

Press thebutton on the buckle,

andlifttoopentheclasp.

Pullthepins out of theadjustment

holes on the band. Slide the band

totheappropriate length. Push the

pinsintothenewholesontheband.

Fastenthebuckle.

Lumibrite

If your watch has Lumibrite

Lumibrite is aluminous paint thatis completely harmless to human beings and

naturalenvironment,containingnonoxiousmaterialssuchasradioactivesubstance.

Lumibrite isanewly-developed luminous paintthatabsorbsthelight energyofthe

sunlightandlightingapparatus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di󰮏er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.

※ 

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di󰮐cult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.

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ToPreservetheQualityofYourWatch

Power source

The battery used in this watch is a special secondary battery, which is totally di󰮏erent from ordinary silver oxide batteries.

Unlike other disposable batteries such as dry-cell batteries or button cells, this secondary battery can be used over and

over again by repeating the cycles of discharging and recharging.

However, for various reasons such as long-term use or usage conditions, the capacity or recharging e󰮐ciency of the

secondary battery may gradually deteriorate. Worn or contaminated mechanical parts or degraded oils may also shorten

recharging cycles. If the e󰮐ciency of the secondary battery decreases, have the watch repaired.

■ Remarks on replacing the secondary battery

・Donotremovethesecondarybatteryyourself.

・Replacement of the secondary battery requires professional

knowledgeandskill.Pleaseaskawatchretailerforrepair.

・

When replacing the secondary battery, make sure that the exclusive

secondarybattery for this watchisused. Installationofanordinary silver

oxidebatterycangenerateheatthatcancauseburstingorignition.

NOTICE

※

Referto"Standardchargingtime"onP.13 5 tocheckthetimerequiredforfullychargingthewatch.

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".

※Overchargepreventionfunction

■ Notes on charging the watch

・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℃ .

NOTICE

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154

After-sale service

ToPreservetheQualityofYourWatch

・Contacttheretailerthewatchwaspurchasedfrom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 by repair work, we will undertake repair

servicesuponrequestandpayment.

● Notes on guarantee and repair

・SEIKOmakesitapolicytotypicallykeepastockofreplacementpartsfor

thiswatchfor7years.Replacementpartsarethosewhichareessential

to maintaining the functional integrity of the watch.Please keep in

mindthatiforiginalpartsarenot available, they may be replaced with

substituteswhoseoutwardappearancemaydi󰮏erfromtheoriginals.

● Replacement parts

・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 due to contamination

of oil may advance or delay the time significantly, or the watch itself

may 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.

●

Inspection and adjustment by disassembly and cleaning

(overhaul)

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157

3 4

ReceivingLevel

High:(H)

Low:(L)

Display

Radiosignalcondition

Easytoreceive

Hardtoreceive

Troubleshooting

156

1 2

Troubleshooting

※



Ifthetime zoneis setto a region otherthan Japan,China ortheUnited

States,thesecondhandwillnotmovetothe0-secondposition.(Themanual

receptionfunctionwillnotwork.)Checkifthetimezoneiscorrectlyset.

Checkthetimezonesetting.→HowtoSelecttheTimeZoneP.112

Placethewatchwhereitcan

easilyreceiveradiosignals.

→



ToImproveRadioSignalReception

P.131

→



EnvironmentsinwhichitisDi󰮐culttoReceiveaRadioSignal



P.13 2

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

Put the watch down.

Press and hold Button A until the second hand

moves to the 0-second position (for four seconds).

The antenna is embedded

at the 9 o’clock position

ofthewatch.Tur ning the

antennatowardtheoutside

ofa window helpsimprove

radiosignalreception.

※

Thiswatchisunabletoreceiveradiosignalsoutsideareceptionrange.



　→

RadioSignalReceptionRangeIndication



P.124



Afterthesecondhandmovestothe0-secondpositionand

stops,thewatchwillstartto

receiveradiosignals.

Leave the watch untouched for several

minutes. (For twelve minutes at the longest)



When the second hand starts moving in one-

second intervals, the reception is completed.

Reception takes some time.

(12 minutes at the longest)

※

Itdependsontheradiosignalconditions.

Receptionresult:N

→

Ifthe Reception has failed: The

secondhandpointstoN　P.13 0

Afterveseconds,thewatchreturnstotheTIMEdisplaymode.

<Ifthereceptionhasfailed>

ThesecondhandindicatesthereceptionresultbypointingtoN.

Uponcompletionofthesignalreception,

checkifthereceptionwassuccessful.

→

AboutReceptionResultDisplayP.128

When the second hand starts moving in one-second intervals,

check if the signal reception was successfully conducted.

※

Duringmovementofthedateordayneither

thebuttonsnorthecrowncanbeoperated.

<Displaybeforecompletingthereception>

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

※Inconjunctionwiththesecondhandmovement,

theminutehandadvancesbyoneminute.

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Troubleshooting

158

・To use the watch outside the reception range

Setthewatchtothetimezoneoftheplacewhereyouusethewatch.

→Howtoselectthetimezone　P.112

Whenthewatch is unabletodisplay the correcttime,date or dayofthe week

evenifthetimezoneisselected,manuallysetthetime,dateordayoftheweek.

Troubleshooting

When the watch is unable to receive radio signals

・

When the watch cannot receive radio signals within the signal reception range. →

At trouble Reception of a radio signal P.176

When the watch is unable to receive radio signals, refer to the following pages for remedies.

Iftheaboveremediesdonotsolvetheproblem,setthetime,dateordayreferring

tothe“HowtoManuallySetthetime,dateorday”sectionbelow.

※Forthesignalreceptionrange,refertoRadioSignalReceptionRangeIndicationP.12 4 .

HowtoManuallySettheTime→ P.160

HowtoManuallySettheDate→ P.162

HowtoManuallySettheDay→ P.165

Q:Thetime cannotbeadjusted immediately after operation ofmanualreception.Why

doesittakesuchalongtimeforthewatchtoadjustthetime.

A:

Ittakes12minutesatmaximumtonishreception.

“Timedata”and“Calendardata”aretransmittedbyastandardfrequencyforoneminuteperonetime,

however,reception is not enabled unlesstheseries of data completely arrives.The received data

frequentlyincludesnoise,etc.,andthewatch isstructured soastorepeatedly perform reception in

ordertocheckthatthereisnoproblemwiththedata.Therefore,itrequirestimetonishthereception.

Ifthereceivingenvironmentispoor,itwilltakealongertimetonishthereception.Inaddition,please

laythewatchdownwithoutoperatingthebuttonsandthecrownduringreception.

Q:Whatisthebestwaytoreceivearadiosignal?

A:

Astandardfrequencydependsonthedistancefromeachtransmittingstation,geography(including

buildings, etc.),andweather.Ideally,place thewatchatthe sideofawindowinthe direction of

eachtransmitting stationbeforebedtime becauseautomatic receptionisperformed during late

night.Also,pleasesearchforaplacetoeasilyreceiveradiosignalstoattemptmanualreception.

■ Radio signal reception Q & A

Q:Whenisaradiosignalreceived?

A:

Astandardradiosignalistransmittednearlycontinuouslyfor24hours,however,aradio-controlled

watchdoesnotreceivearadiosignalthroughouttheday.Thewatchhasbeensettoautomatically

receivearadiosignalafewtimesadayduringlatenightwhenaradiosignalcanbestablyreceived.

Whenthewatchisunabletoreceiveradiosignals,itcanbeusedbyquartzmovement(accuracyof

loss/gain:± 15secondspermonth)asanormalquartzwatch.

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160

161

OneminuteAdvance

PressButtononceandthenreleaseit.

Continuous

Advance

WhenButtoniskeptpressedfortwosecondsorlonger,

thehandwillstarttomove.PressButtonagaintostop.

012

Troubleshooting

012

Troubleshooting

※ When the watch enters the manual time

setting mode,the receptionresults will be

indicateda s“ N , ”since thereceptionresults

datawillbelost.

※



When the crown is

a screw lock type,

unlockit.→P.10 7

The Second handmoves to pointto

the0-secondpositionandthewatch

entersthemanualtimesettingmode.

Pull out the crown to the

second click.

※ 

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

itcan move dependingon normalquartz movement

(accuracyofloss/gain:± 15 secondspermonth).

■

How to manually set the time

→ 

Radio Signal Reception Range

IndicationP.124

・

Whenusingthewatchagaininregionsinwhich

thewatchisabletoreceivearadiosignal,itis

recommendedtoperform“Manualreception.”

→

Automatic Reception and Manual

ReceptionP.123

※

Whenthewatchreceivesaradiosignalaftermanual

adjustmentofthetime,itdisplaysthereceivedtime.

When the watch is used continuously

in conditions in which the watch may

be unable to receive a radio signal, it

can be manually adjusted.

・

Whenadjustingthetime,thedateanddaywillbe

accordinglyadjusted.

※

Thepointinwhichthedatechangesat0:00AM(12:0 0PM).Adjust

thetimetakingintoconsiderationthatitissetduringtheAMandPM.

Operationhasbeencompleted.

The watch resumes its normal

movement.

Push the crown back in

simultaneously with a time signal.

Press Button A or B to set

the time.

※ When the crown

is a screw lock type,

unlockit.→ P.10 7

※

Press the

ButtonBwith

your finger or

withanobject

with a  long

taperedtip.→

P.10 6.

※Turningthecrownwillnotmovethehand.

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163



Thewatchentersthemanualdatesettingmode.

Keep pressing down the Button A (for 3

seconds) until the second hand moves

to point to the 13-second position.

Keep pressing down the Button A (for 3

seconds) until the second hand moves

to point to the 55-second position.

Troubleshooting

Continued on the next page.

162

■

How to manually set the date



The secondhandrotates untilitpoints

tothe30-secondpositionandstops.

Boththemainwatchandthesubdialcontinuetooperate.

Pull out the crown to the

rst click.

※

If the date remains incorrect even after a

successful radiosignal reception, the preliminary

positionofthedatemaybemisaligned.

→

HowtocorrectthepreliminarypositionsP.16 9

If you use the watch outside the radio signal reception

range or in conditions where the watch cannot receive radio

signals, the date will not be automatically adjusted. In such a

case, especially on the rst day after a month that has less

than 31 days, the watch requires manual date setting.

・Thedatecanbeadjustedindependently

ofthetimeordayoftheweek.

※Whenthewatchreceivesradiosignalsafter

thedateismanuallyadjusted,itdisplaysthe

datereceivedfromradiosignals.

・

Tousethewatchinaradiosignalreceivable

condition again, conduct automaticsignal

receptiontosetthetime.

→

AutomaticReceptionandManualReceptionP.123

※Unlockthe

crown.

→P.10 7

Troubleshooting

012

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165

■

How to manually set the day of the week



Thesecondhand rotatesuntil itpoints

tothe30-secondpositionandstops.

Boththemainwatchandthesubdial

continuetooperate.

Pull out the crown to the

rst click.

・The day of the week can be adjusted

independentlyofthetimeordate.

・To use the watch in a radio signal

receivable condition again, conduct

automatic signal reception to setthe

dayoftheweek.

→Automatic Reception and Manual

ReceptionP.123

※Whenthewatchreceivesradiosignals after

theday ofthe week ismanuallyadjusted,it

displays the dayof the weekreceived from

theradiosignals.

※Unlock the

crown.

→P.10 7

Troubleshooting

Continued on the next page.

012

164

Press the Button B to set

the date.

Theoperationisnowcompleted.

Push the crown back.

Toadvanceoneday

Pressthebuttononceandrelease.

Toadvance

rapidly

Keeppressingdownthebuttonforlongerthan2seconds.

Pressthebuttononceagaintostop.

※Turningthecrownwillnotmovethehand.

※

Whilethedateismoving,thebuttoncannotbeoperated.

※The date can only move forward.It cannot

movebackward.

※Relockthecrown.

→P.10 7.

※

PresstheButtonB

withyourfinger or

withanobject with

a longtaperedtip.

→P.10 6

Troubleshooting

012

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167

Theoperationisnowcompleted.

Push the crown back.

※Relockthecrown.

→P.10 7

※Ifthedayoftheweekremainsincorrecteven

afterasuccessfulradiosignalreception,the

preliminary positionoftheday hand maybe

misaligned.

→

Howtocorrectthepreliminarypositions

P.16 9

Troubleshooting

012

166

Thewatchentersthemanualdayof

theweeksettingmode.

Keep pressing down the Button A (for 3

seconds) until the second hand moves

to point to the 55-second position.

Press the Button B to set

the day of the week.

Toadvanceoneday

Pressthebuttononceandrelease.

Toadvance

rapidly

Keeppressingdownthebuttonforlongerthan2seconds.

Pressthebuttononceagaintostop.

※Turningthecrownwillnotmovethehand.

※While the day ofthe week is moving, the

buttoncannotbeoperated.

※The day ofthe week hand can only move

forward.Itcannotmovebackward.

※

PresstheButtonB

withyourfinger or

withanobject with

alongtaperedtip.

　→P.10 6

Troubleshooting

BSB8B54 p095-188 欧文.indd 166-167 19.11.6 11:31:42 AM

169

How to correct the preliminary positions

■ Setting the preliminary position of the date, day hand, hour

and minute hands

The preliminary position of the date is the “ 1st.”

The preliminary position of the day hand is “M.”(Monday)

The preliminary positions of the hour and minute hands are “0:00 AM.”

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.

When the preliminary positions are incorrect, the correct date, day of the week

or time cannot be displayed even if the watch receives radio signals.

In such a case, by correcting the preliminary positions, wrong date or day

indication, loss or gain of the time can be corrected.

Troubleshooting

168

Troubleshooting

Preliminary position

When the watch is unable to display the precise time date or day even if it successfully receives

a radio signal with the correct time zone setting, the preliminary position may be misaligned.

Thepreliminarypositionmaybemisalignedduetothefollowingreasons.

　･

IInthecaseofhavingastrongimpact:Misalignmentofthetimeanddatemayoccurwhendroppingorhittingthewatch.

　･

Inthecaseofamagneticinuence:Misalignmentofthetimeanddatemayoccurwhenbringingthewatchclosetoanobjectwhichgeneratesmagnetism.

　Exampleofcommonmagneticproductsthatmaya󰮏ectwatches.　P.143

Whencomparingthestateof“MisalignedPreliminaryHandPosition”tothatofaweightscale,itislike“ascale

whichisunabletodisplaythecorrectweightbecauseitsneedleisnotsettothezeropositionbeforeweighing.”

The hour, minute, and second hands have an“Automatic Hand Position Adjustment

Function,”whichautomaticallycorrectsanincorrectpreliminaryposition.

AutomaticHandPositionAdjustmentFunctionactivatesonceaminuteforthesecond

handandat12:00bothfortheAMandPMforthehourandminutehands.

※

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

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

■

Automatic Hand Position Adjustment Function (Function to automatically adjust the preliminary position of the hour and minute hands)

■ Setting the preliminary position of the date and the day

Sincethepreliminarypositionofthedateandthedayisnotautomaticallyadjusted,itmustbeadjustedmanually.

→Settingthepreliminarypositionofthedate　P.169

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171

Within 20 seconds after the

date stops, press the Button

B to set the date to “ 1.”

2 3



Makesurethatthenumericalnumber“1”

islocatedatthecenterofthedatewindow.

※

If“1”isalreadydisplayedinthedatewindow,moveontotheprocedure③.

Keep pressing down the Button A (for

3 seconds) until the second hand stops

pointing to the 55-second position.



Thewatchentersthepreliminaryposition

settingmodefordayoftheweek.

Toadvance

rapidly

Keeppressingdownthebuttonforlongerthan2seconds.

Pressthebuttononceagaintostop.

Tone-tune

Keeppressingdownthebuttonaslongasyouwanttoadvancethenumericalnumber.

Troubleshooting

Continued on the next page.

170

Within 20 seconds after

procedure ① is completed

and the date stops, start the

operation of procedure ② .

※If thewatch is left untouched for

20seconds after thedate stops,

the watch automatically returns

to the TIME display mode. If this

happens,restarttheoperationfrom

procedure①.

■ Setting the

preliminary positions

of the date, day hand,

hour and minute

hands (Continued)

Keep pressing down the Button A and B (for 4 seconds) at the same

time until the second hand stops pointing to the 13-second position.

※First, presstheButtonB,andsubsequentlypress the

Button A while keeping holding downtheButton Bso

astopressbothofthemsuccessfully.

※

Whilethedateismoving,thebuttoncannotbeoperated.

※Donotpullthe

crownout.

※

PresstheButtonB

withyour finger or

withan object with

alongtaperedtip.

→P.10 6



Thewatchentersthepreliminarypositionsettingmode

for date. Thedatewill start to move and stop at the

preliminaryposition.

Troubleshooting

PressSimultaneously

for4Seconds

BSB8B54 p095-188 欧文.indd 170-171 19.11.6 11:31:43 AM

Press the Button B once

and release it.

After completing the operation, leave

the watch untouched for 20 seconds.

The watchautomatically exits the

preliminarypositionsetting mode,

and thesecond,hour and minute

handsstartmoving.

Whenthe watch returnsto theTIME

displaymode, checkifthe time,date

anddayoftheweekareallcorrect.

Ifthetime,dateanddayoftheweek

arenotcorrect,manuallysetthem.

Adjustingthetimeanddatebyreceivingaradiosignal

Howtoconductmanualreception→P.156

Whenthewatchisunabletoreceivearadiosignal

Howtomanuallysetthetime→P.160

Howtomanuallysetthedate→P.162

Howtomanuallysetthedayoftheweek→P.165



The hour and minute hands start to

moveandstoppointingat“0:00am.”

173

Troubleshooting

Press the Button B to set the

day hand to point to “M.”

Makesurethatthedayhandissetto

pointto“M.”

Keep pressing down the Button A (for 3 seconds) until

the second hand stops pointing to the 0-second position.



Thewatchentersthepreliminaryposition

settingmodeforhourandminutehands.

※

Ifthe hourand minutehandsare already indicating the correcttime,

moveontotheprocedure⑦.

172

Toadvance

rapidly

Keeppressingdownthebuttonforlongerthan2seconds.

Pressthebuttononceagaintostop.

Tone-tune

Keeppressingdownthebuttonaslongasyouwanttoadvancethedayhand.

Troubleshooting

※If the dayhand is already pointing to“M”,

moveontotheprocedure⑤.

BSB8B54 p095-188 欧文.indd 172-173 19.11.6 11:31:44 AM

175

Troubleshooting

174

Troubleshooting

At trouble Possible causes

Hand

Movement

The second hand moves

attwo-secondintervals.

Theenergydepletionforewarningfunctionisactivated.(P.136)

Ifthesecond hand movesattwoor ve-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.

The second hand moves

atve-secondintervals.

The stopped second hand

pointing to the 15-second

positionstartedoperating.

Thepowersavefunctionhasbeenactivated.(P.137)

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.



The stopped second hand

pointing to the 45-second

positionstartedoperating.

Thepowersavefunctionhasbeenactivated.(P.137)

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.



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.137)

Theautomatichandpositionadjustmentfunctionwasactivated.(P.168)

Whenthehandpositionsdeviatetodisplayincorrecttimeasaresultofexternalinuences,etc.,thewatch

automaticallycorrectsthehandmisalignmentbytheautomatichandpositionadjustmentfunction.

At trouble

Solutions

Referencepages

Fully charge the watch so that the second hand may move at one-second

intervals.

Becarefulnottoconcealthewatchunderasleeve,etc.,whilewearingit.

Whentakingo󰮏thewatch,placeitinasbrightalocationaspossible.

P.134

Waituntilthecurrenttimeisdisplayed.

Nooperationisneeded(thisisnotamalfunction.)

－

1.

Fully charge the watch so that the second hand may move at one-second

intervals.

2.

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

needed.

P.134

P.123

Nooperationisneeded(thisisnotamalfunction). －

BSB8B54 p095-188 欧文.indd 174-175 19.11.6 11:31:44 AM

177

Troubleshooting

176

Troubleshooting

At trouble Possible causes

Reception of

a radio signal

When the watch is

unable to receive a

radiosignal

Thereceptionresults

have failed and the

second 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.)

Thewatch was leftwhere theradiosignal wasweakor

whereitwasunabletoreceivearadiosignal(P.132).

Transmittingstationsmayhavestoppedtransmitting

radiosignalsforsomereason(Transmissionstop).

The selected time zone is out of the radio

signalreceptionrange.

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su󰮐cient.

Thebuilt-inICofthewatchhasfallenintoan

unstablecondition.

Solutions

Referencepages

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.131

P.157

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

P.131

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.133

1.Checkifthe selected timezoneis within the radiosignalreception range, ifnot,change the

timezonetotheonewithintheradiosignalreceptionrange.

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

P.112

P.123

Thetimerequiredforchargingthewatchdependsentirelyontheamountofexposedlightthewatchreceives.

Referto“StandardChargingTime”tochargethewatch.

P.135

Referto“InCaseofanAbnormalMovement”toresetthebuilt-inIC.

P.182

BSB8B54 p095-188 欧文.indd 176-177 19.11.6 11:31:44 AM

179

Troubleshooting

178

Troubleshooting

At trouble Possible causes

Misalignment

of the time and

hand positions

Thewatchtemporarily

gainsorlosestime.

Thewatchfailstoreceivearadiosignalcorrectlyas

aresultofexternalinuence(incorrectreception).

Thewatch hasbeen leftinanextremelyhigh

orlowtemperatureplaceforalongtime.

Thewatchdisplaysanincorrecttime

hourunit,eventhoughitdisplaysthe

precisetimeofminutesandseconds

Thetimezoneisnotcorrectlyset.

The reception results are

successful,buttheprecise

timeisnotdisplayed.

Thehandpositionsweremisalignedasaresultofexternalinuence.

Thehandsareoutofthepreliminarypositionasaresultofexternalinuence.

→

PreliminaryPosition(P.168)

The second hand

positionis not correctly

alignedin“thereception

results display” or“the

receptionleveldisplay.”

The second hand is out of the preliminary

positionasaresultofexternalinuence.

→ PreliminaryPosition(P.168)

Solutions

Referencepages

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

2.Conductmanualreceptionifnecessary.

P.131

P.156

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.156

－

Make surethatthe watch is set to the time zone that covers the

placewhereyouusethewatch.

P.112

1.No crown or buttonoperationisneeded,sincetheautomatichandposition

adjustmentfunctionwill be activated to alignthehand positions. Automatic

Hand Position Alignment Function activates once a minute for the second

handandat12:00bothfortheAMandPMfortheminuteandhourhands.

　Itcanbemanuallyadjusted,whenyouhurryup.

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.168

P.160

P.182

－

BSB8B54 p095-188 欧文.indd 178-179 19.11.6 11:31:44 AM

181

Troubleshooting

180

Troubleshooting

※

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

Solution

Referencepages

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

P.169

Checkifthedayissettothecorrectpreliminaryposition"M"(Manday).Ifnot,

correctthepreliminarypositionforday.

P.169

Resetthetimeforsubdial.

P.120

Su󰮐cientlychargethewatchuntilitstartsmovingatone-secondintervals.

P.134

Waitwithoutdoinganything.

Afterthedatestops,thecrownandbuttonscanbeoperated.

－

1.Ifthecrownispulledout,pushitbackin.

2.

Thewatchwillresumeitsnormalone-secondintervalmovementswithin9minutes.

3.Startthesettingprocedurefromthebeginning.

－

Contacttheretailerfromwhomthewatchwaspurchased. －

At trouble Possible cause

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inuenceofvariousexternalsourcesorafterthebuilt-inICisreset.

Misalignment

of the day

The reception result display confirms

successfulreception, and thecorrect timeis

displayed,butthewrongdayisdisplayed.

Thedayisoutofpreliminaryposition.

Thishappenswhenthedayisoutofpreliminarypositionasaresultof

inuenceofvariousexternalsourcesorafterthebuilt-inICisreset.

Wrong display

of the sub dial

Thesub dialis setto thetime shownby themain

watch,butthesubdialdisplaysthewrongtime.

Thereisnopreliminarysettingmodefor subdial.Thishappenswhenthehandsof

subdialareoutofalignmentasaresultofinuenceofvariousexternalsources.

Operation

Thecrownorbuttons

cannotbeoperated.

Thestoredelectricpowerisrunningshort.

Dateismoving right after a setting iscarried

outbythecrownorbuttonoperation.

Yougetlostin

themiddleofthe

operation.

－－－－－－－－－－－－－－－－－－－－－－－－

Others

Bluronthedialglass

persists.

Smallamountofwaterhasgotinsidethewatch

duetodeteriorationofthegasket,etc.

BSB8B54 p095-188 欧文.indd 180-181 19.11.6 11:31:44 AM

BSB8B54 H2-3.indd 2-3 18.2.15 0:57:11 PM









When all the hands stop pointing to 12 o’clock

0 minutes and 0 seconds, push the crown back.

 

      

         





Continued on the next page.

















 





Keep pressing down the Button A and B at the

same time for 4 seconds, and then release them.







In case of an abnormal movement

■

How to reset the built-in IC (from ① to ③ )

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, perform the procedures

from ① to ⑨ to re-establish

normal function.

    



 

Pull out the crown to the second

click.

      









BSB8B54 p095-188 欧文.indd 182-183 19.11.6 11:31:45 AM

185

Keep pressing down the Button A (for 3 seconds) until the

second hand stops pointing to the 55-second position.

■ Setting the day of the week to “M” (Monday.) ( ⑥，⑦ )



The watch enters the preliminary position

settingmodefordayoftheweek.

Troubleshooting

Press the Button B to set

the day hand to point to “M.”

Makesurethatthedayhandissetto

pointto“M.”

Toadvance

rapidly

Keeppressingdownthebuttonforlongerthan2seconds.

Pressthebuttononceagaintostop.

Tone-tune

Keeppressingdownthebuttonaslongasyouwanttoadvancethedayhand.

Continued on the next page.

184184

Within 20 seconds, press the

Button B to set the date to “ 1.”

Keep pressing down the Button A and B (for 4 seconds) at the same

time until the second hand stops pointing to the 13-second position.

※Donotpull

the crown

out.

■ Setting the date to the “1st.” ( ④，⑤ )

※

First,press theButton B,and subsequentlypress the Button A while

keepholdingdowntheButtonBsoastopressbothofthemsuccessfully.



Makesurethatthenumericalnumber“1”

islocatedatthecenterofthedatewindow.

※

If“1”isalreadydisplayedinthedatewindow,moveontotheprocedure⑥.

Within 20 seconds after procedure ④ is completed, start the operation of procedure ⑤ .

※Ifthewatchisleftuntouchedfor20secondsafterthesecondhandstops,thewatchautomatically

returnstotheTIMEdisplaymode.Ifthishappens,restarttheoperationfromprocedure④.

※

PresstheButton

B  with your

finger or with

anobject with a

long tapered tip

onP.10 6 .

Presssimultaneously

for4seconds

Toadvance

rapidly

Keeppressingdownthebuttonforlongerthan2seconds.

Pressthebuttononceagaintostop.

Tone-tune

Keeppressingdownthebuttonaslongas

youwanttoadvancethenumericalnumber.

Troubleshooting



Thewatchentersthepreliminarypositionsettingmodefordate.

BSB8B54 p095-188 欧文.indd 184-185 19.11.6 11:31:45 AM

187

Set the Time by receiving

radio signals

■ Setting the time

How to conduct manual

reception → P.156

Whenthewatchisunabletoreceive

radiosignals,you can manually set

thetime,dateanddayoftheweek.

Howtomanuallysetthetime→P.160

Howtomanuallysetthedate→P.162

Howtomanuallysetthedayoftheweek→P.165

Aftercompletingtheproceduresup

to⑩,makesuretosetthetime.

The operation is completed when the

time, date and day of the week are set.

Troubleshooting

Set the Daylight Saving

Time (DST) as necessary.

TosettheDaylightSavingTime,selectthetimezone

indexnexttothetargettimezone(+1hour)whichis

indicatedbythearrowunderthetimezoneindex.

<Example>When theDaylight Saving Time isbeing

observedinParis,setthesecondhandtopointatthe

nexttimezoneindexCAI,asindicatedbythearrow.

TimezoneindexforPAR(Paris)

Time zone index for PAR (Paris)

while theDaylight Saving Time

isbeingobservedinParis.

186

Troubleshooting

Within 10 seconds after procedure ⑧ is completed, start the operation of procedure ⑨ .

※

Ifthewatchisleftuntouchedfor10secondsafterthesecondhandstops,thewatchautomatically

returnstotheTIMEdisplaymode.Ifthishappens,restarttheoperationfromprocedure⑧.



Witheachpressingofthebutton,thesecondhand moves

totheadjacenttimezoneindex.

Within 10 seconds after procedure 8 is

completed, press the Button A or B to set the

second hand to point to the target time zone.

Press the Button B (for 4 seconds)

until the second hand stops.



Thesecondhandwillstarttomove

and stoppointing to the currently

selectedtimezone(UTC/LON).

■ Setting the time zone ( ⑧ to ⑩ )

10 seconds after procedure ⑩ is completed, the watch

automatically exits the Time Zone Setting mode.

20 seconds after procedure ⑦ is completed, the watch automatically

exits the preliminary position setting mode for day of the week.

BSB8B54 p095-188 欧文.indd 186-187 19.11.6 11:31:46 AM

188

Specications

1. Basic feature ･････････

Frequency of crystal oscillator

･･

Loss/gain (monthly rate)

･･･

Operational temperature range

･･

5. Driving systems ･････

6. Power source ････････

Duration of operation

･･

Time setting by receiving the JJY-LF radio signal

･･

IC (Integrated Circuit)

･･

Specications

※ Thespecicationsaresubjecttochangewithoutpriornoticeforproductimprovement.

Basic watch with three hands (hour, minute and second hands), date display,

Retrograde day indicator, Sub dial with 2 hands (Hour and Minute hands)

32,768 Hz (Hz = Hertz ... Cycles per second)

Loss / gain ±15 seconds on a monthly rate (Except the case when the watch is

used without an automatic time setting by receiving a radio signal and when it is

worn on the wrist within a normal temperature range between 5℃ and 35℃ ).

Between −10℃ and +60℃

Step motor (Hour and minute hands, second hand, and the date, day and

hour and minute hands for sub dial)

Secondary battery, 1 piece

Approximately nine months (Fully charged, and the Power Save is not activated).

※

If the Power Save is activated after it is fully charged, the watch

continues to run for approximately two years at maximum.

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

※

Reception attempts depend on the radio signal receiving conditions.

※

After having received a radio signal, the watch will start to move

depending on the quartz movement until the next reception.

※

Manual reception is also available.

Oscillator, frequency divider and driving circuit C-MOS-IC, 3 pieces

BSB8B54 p095-188 欧文.indd 188 19.11.6 11:31:46 AM

Seiko 8B54 Operating instructions

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