Seiko 7B27 Operating instructions

Brand: Seiko

Model: 7B27

Category: Watches

Type: Operating instructions

Contents

1. About This Product

Handlingcautions･････････････････････････72

Features････････････････････････････････････ 76

Displayandbuttonoperation････････････78

HowtouseButtonAandB･････････････ 80

Crown････････････････････････････････････････81

2. Before Use

Beforeuse･･････････････････････････････････82

3. World time function

Howtousetheworldtimefunction････84

Howtoselectthetimezone(Howto

displaythelocaltimearoundtheworld)

･･･86

Timezonedisplayandtimedi󰮏erence

table･････････････････････････････････････････88

Q&Afortheworldtimefunction･･･････ 90

4. How to Set the Time (Radio Signal Reception)

Settingthetimeanddate

byreceivingaradiosignal･･･････････････ 91

Aboutreceptionconditions･･････････････93

Howtocheckthereceptionresults････96

5. Solar Charging Function

Aboutcharging････････････････････････････

102

Aboutenergy･･･････････････････････････････

104

6. To Preserve the Quality of Your Watch

Dailycare･･･････････････････････････････････

106

Performanceandtype････････････････････

106

Waterresistance･･････････････････････････

107

Magneticresistance･･････････････････････

108

※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.

 Theservicemayalsobeavailable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.

Band･････････････････････････････････････････

110

Specialclasps･････････････････････････････

112

Powersource ･･････････････････････････････

116

Lumibrite････････････････････････････････････

117

After-saleservice･･････････････････････････

118

7. Troubleshooting

Howtoconductmanualreception

(Receivingaradiosignalmanually) ････

119

Whenthewatchisunabletoreceive

radiosignals････････････････････････････････

121

Preliminaryposition･･･････････････････････

126

Howtocorrectthepreliminary

positions････････････････････････････････････

127

Attrouble･･･････････････････････････････････

130

Incaseofanabnormalmovement･･････

134

8. Specications

Specications･･････････････････････････････

135

・

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.

WARNING

・

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.116

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

AboutThisProduct

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.

AboutThisProduct

1WARNING

CAUTION

・

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℃orrisesabove35℃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

CAUTIONS

・

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.

AboutThisProduct

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.

AboutThisProduct

CAUTIONS

Features

World Time Function........... Byselectingatimezone,thewatchcandisplaythelocaltimeinthe

selectedtimezonearea.

Radio Signal Receiving Function

...

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fromJapan,China,andtheU.S.A(selectthereceiving

stationusingtheworldtimefunction).

Display Function of Radio Signal Reception Results...

Themovementofthesecondhandindicatesradio

signalreceptionresults(Yes/No).

→

P.84

→

P.91

→

P.96

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,

China,andtheU.S.A.)

AboutThisProduct

1Display and button operation

Crown

Button A

Button B

→P.80

※



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

withthefunctionbeingused.Followthe

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

※



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

withthefunctionbeingused.Followthe

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

Normalposition:Howtoselectthetimezone P.86

Checkingthereceptionresult

 P.96

Manualreception P.119

Firstclick:

Manualdatesetting

 P.124

Secondclick:

Manualtimesetting

 P.122

Resettingthebuilt-inIC

 P.134

※

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

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

　

→



CrownP.81

20 1

Date

Main Watch

Minute hand

Hour hand

Second hand

Display Function of Radio Signal Reception Level .......

Themovementofthesecondhandindicatesthe

radiosignalreceptionlevelduringradiosignalre-

ception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six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with-

out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.

→

P.119

→

P.102

→

P.104

→

P.105

→

P.126

AboutThisProduct

Standard Frequencies Transmitting Station Display

【

Time zone selection

】

→P.86

Citynames･･･ 25citiesaround

theworld

DisplaystimezoneintheStandard

FrequenciesTransmittingStation.

･･･JJY(Japan)

･･･BPC(China)

･･･WWVB(TheU.S.A)

Time Zone Display

Display of Radio Wave Reception Result

【

Checking the reception results

】

　→P.96

Display of Radio Wave Reception Level

･･･ Highreceptionlevel

(50-secondposition)

･･･ Lowreceptionlevel

(40-secondposition)

･･･ 

Unabletoreceiveradiosignals

(20-secondposition)

【

Manual reception

】→P.119

･･･ReceptionSuccessful

(10-secondposition).

･･･ Receptionfailed

(20-secondposition).

※

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

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

How to use Button A and B

ButtonsAandBarerecessedinthewatchcasetoimprovethedesignandtoprevent

erroneousoperation.Pleaserefertothefollowingguresforhowtopressthebuttons.

AboutThisProduct

※Thebuttonshapevariesdependingonthedesign.

<How to use>Press it using an object with a long tapered tip, etc.

Buttonentirely

covered

Buttonisrecessed

inthewatchcase

※

Pressthelowerhalfof

theButtonwithyournger.

UpperhalfoftheButtoniscovered

Buttonhas

ahollow

※

Commonto

bothButtons

AandB

<How to use>Press with your nger.

Buttondoesnot

haveahollow

※

ButtonBdoes

not h ave t his

structure.

Buttonprotrudesfromthewatchcase

Buttonpartiallycovered

・

Both Buttons A and B have a hollow

Pressthebuttonsusinganobjectwithalongtaperedtipholdingthe

watchasshownintheguresothatthewatchdoesnotmove.

・

Button A does not have a hollow, and Button B has a hollow

PressButtonAwithyourngerandButtonBusinganobjectwitha

longtaperedtip.

■ When pressing Buttons A and B at the same time

Makesuretoconrm“HowtouseButtonsAandB”asshownabovebeforepressingthebuttons.

First,pressButtonB,andpressButtonAwhilepressingButtonBsoastopressthemsuccessfully.

※Press t he b uttons on  a

soft cloth or t he like b efore

operationinorderto prevent

damagetothewatch.

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

requirescharging.

BeforeUse

1. Checking the charging status

Before use

※

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.131

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.

Theenergydepletionforewarning

functionisactivated.→P.10 4

Chargethebatterysu󰮐ciently.

Thepowersavefunctionisactivated.



→

P.105

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

watch

→P.102

Thesecond

handisstopped.

AboutThisProduct

Crown

Therearetwotypesofcrowns,anormalcrownandascrew-lockcrown.

Checkthecrownonyourwatch.

The

crown

does not

turn.

The crown

turns.

Tur nthe

crown

clockwise.

※

Ifyourwatchhasascrew-lockcrown,thecrownscrewsintothewatchtopreventmalfunctionandincreasewaterresistance.

※Becarefulnottoscrewthecrowninbyforceasitmaydamagetheslotsofthecrown.

Normal crown

Screw-lock type crown

Pull out the crown and operate it.

Unlockthecrownbeforeoperatingit.

Afteroperating

thecrown,lockit.

Screw

While pressing

the crown

Unscrew

BeforeUse

2. Checking the time and date

※

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

timeanddate,refertothefollowingpages.

Whenthetimeand

datearecorrect

Whentheradio

signalcanbe

received

Usethewatchwithout

adjustment.

Wheneitherthe

timeordateis

incorrect

Whenaradio

signalcannot

bereceived

Howtosetthe

timezone→

P.86

Settingthetimeand

datebyreceivinga

radiosignal→P.91

Manuallysetthetime

→

P.122-123

Manuallysetthedate

→

P.124-125

Aboutreceptionconditions

→

P.93

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

→

P.99

※



Ifeitherthetimeordateisincorrect,eventhougharadiosignalwasreceivedsuccessfully→“Misalignmentofthe

timeandhandpositions”inTroubleshootingonP.132and“Misalignmentofthedate”inTroubleshootingonP.133

How to use the world time function

■ World time function

→

HowtoselectthetimezoneP.86

→

Timezonedisplayandtimedi󰮏erencetableP.88

・

If the time zone is set to Japan, China, and the U.S.A, the watch displays the precise

time and date by receiving radio signals, provided that the watch is within the radio

signal reception range.

IntheTimeZoneSettingmode,

thesecondhandindicatesthe

selectedtimezone.

・

The local time in a di󰮏erent time zone can be displayed by selecting a time zone

among 25 regions around the world.

※

Thewatchisunabletoreceiveradiosignalsoutsidethereceptionrange.

→

AboutreceptionconditionsP.93

Worldtimefunction

Timezoneindication

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

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..

※

TopressButtonB,useanobjectwithalong

taperedtip.

→

P.80

Worldtimefunction

31.

Keep pressing down Button B (for

3 seconds) until the second hand

stops.

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

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

2. Within 10 seconds after carrying

out procedure 1., press Button

A or B to set the second hand

to point at the target time zone

index.

Witheachpressingofthebutton,thesec-

ondhandmovestotheadjacenttimezone

index.

Button A

for clockwise

turn

Button B

for 3 seconds

for counter-

clockwise turn

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

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

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isautomaticallyadjustedinconjunctionwith

thetime.

Worldtimefunction

<Beforetimezonesetting> <Aftertimezonesetting>

Worldtimefunction

3. Wait for ten seconds after

the movement of the hour

and minute hands stop.

(The time zone adjustment

mode is nished.)

Thesecondhandstartstomove.

Thewatchautomaticallyadjusts

thedateasnecessary.

※

Whilethedateismoving,neitherthe

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

The radio signal transmitting station

can be changed by selecting the time

zone. When selecting a time zone for

regions other than the radio signal

reception ranges, the radio signal

reception function will not work.

※

WhensettingDaylightSavingTime(DST),addonehour

tothetimezoneofadesiredarea.

Timezone

displayandtime

di󰮏erencetable

→

P.88

Inothercountries

InJapan InChina

Setthesecond

handtothe23

secondposition.

Setthesecond

handtothe21

secondposition.

















󰮏





































































































































Time zone display and time di󰮏erence table















󰮏























































































































































󰮏 





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.)

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radiosignaltransmittingstationcanbechangedbyselectingatimezone.)

Ｑ：WhenreturningtoJapanfromoverseas,isthetimeautomaticallysettoJapantime?

Ａ：

JustmovingcannotadjusttheJapaneselocaltime.Afterselectingthetimezone,radiosignalreceptionisnot

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

Ｑ：Thehandsstopduringoperationoftimezonesetting,therefore,doesatimelagoccur?

Ａ：Theinternalcircuitstoresthetime,therefore,notimelagoccurs.

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

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

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

Ｑ：Howisadjustmentmadetoalocaltimewithatimedi󰮏erenceof15minutesor30minutes?

Ａ：Thetimecanbeadjustedona1hourbasisbyuseofthetimedi󰮏erenceadjustmentfunction.

Whenadjustingtoalocaltimewithatimedi󰮏erenceof15minutesor30minutes.

→

HowtomanuallysetthetimeP.122

Q & A for the world time function

Worldtimefunction

BasedonCoordinatedUniversalTime(UTC),thestandardtimecommonly

usedisadoptedbycountriesandregionsaroundtheworld.Thestandard

timeisdeterminedbyeachcountryorregion,andtheregionwherethe

samestandardtimeisadoptedisreferredtoasthetimezone.Further,

DaylightSavingTime(DST)isindividuallyadoptedincountriesandregions.

[What is UTC (Coordinated Universal Time)?]

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

Itisusedastheo󰮐cial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.Theadoptionanddurationof

DaylightSavingTime(DST)varies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.)

■ What is a time zone?

Transmitting

Station

Cesium

AtomicClock

Radio-controlledwatch

Receiveradiosignals

throughtheantennainside

thewatch

↓

Analyzetimeinformation

↓

Displaythecurrenttime

anddate

O󰮐cialstandard

frequency

■ Mechanism of radio signal reception

Theradio-controlledwatchdisplaystheprecisetimeanddatebyautomaticallyreceiv-

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

Thestandardfrequencyfortimeinformationcomesfroma“cesiumatomicclock,”which

maintainstheultra-precisionofaone-seconddi󰮏erenceaboutevery100,000years.

Setting the time and date by receiving a radio signal

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

※

IfthetimezoneissettoaregionotherthanJapan,China,andtheU.S.A,thesignalreceptionfunctionwill

notwork.

→

Timezonedisplayandtimedi󰮏erencetableP.88

※

RadioSignalreceptionresultsdependonthereceivingcondition.

→

Environmentsinwhichitisdi󰮐cultto

receivearadiosignalonP.99

※

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

→

Aboutreceptionconditionson

P.93

※

Ifeitherthetimeordateisincorrect,eventhougharadiosignalwasreceivedsuccessfully→“Misalignment

ofthetimeandhandpositions”inTroubleshootingonP.132and“Misalignmentofthedate”inTrouble-

shootingonP.133

・

Manual reception

Whenthiswatchcannotautomaticallyreceivearadiosignalduetoadi󰮐cult

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

→HowtoconductmanualreceptionP.119

・

Automatic reception

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

time.Itautomaticallyreceivesaradiosignalbefore2:00AM,3:00AMand4:00AM.

※

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

■ Automatic reception and manual 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.98

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

■ Radio signal reception range: China (BPC)

Thereceptionrangefromthetransmittingstationisapproximately1,500km(1,500

kmradiusofthetransmittingstation).

BPC is operated by NTSC.

Shangqiu National Time Service Center

Frequency: 68.5kHz

※

NTSC:NationalTimeServiceCenter

※

Thewatchmaybeabletoreceiveradiosignals

outsideareceptionrangeifthereceivingconditions

arefavorable.

※

Thewatchmayfailtoreceiveradiosignalsdepending

onthereceptionconditions(weather,geographic

locations,radiodisturbancessuchastallbuildings,

andorientationofthewatch).



→

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

radiosignalP.99

ShangqiuNational

TimeServiceCenter

(68.5kHz)

Approx.1,500km

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

About reception conditions

ThiswatchreceivesstandardradiosignalsfromJapan(2stations),China,andtheU.S.A.

Whenyousetthewatchtoeachtimezone,theo󰮐cialstandardfrequenciesthewatchreceiveswillbe

automaticallychangedaccordinglytotheselectedtimezone.→HowtoselectthetimezoneP.86

■ Radio signal reception range: Japan (JJY)

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

JJY is operated by the National Institute of

Information and Communications Technology (NICT).

JJY is transmitted from two stations in Japan.

Each station transmits JJY in a di󰮏erent frequency.

Fukushima (Ohtakadoya-yama

transmitting station: 40 kHz)

Kyushu (Hagane-yama transmitting

station: 60 kHz)

※

NICT:NationalInstituteofInformationand

CommunicationsTechnology

※



Whetherthewatchsucceedsinreceivingradio

signalsornotdependsonthereceivingconditions.



→

Environmentsinwhichitisdi󰮐cultto

receivearadiosignalP.99

Ohtakadoya-yama

transmittingstation

(40kHz)

Hagane-yama

transmitting

station(60kHz)

Approx.1,000km

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

WWVB is operated by NIST.

Fort Collins transmitting station

Frequency: 60 kHz

※

NIST:NationalInstituteofStandardsand

Technology

※

Thewatchmaybeabletoreceiveradiosignals

outsideareceptionrangeifthereceiving

conditionsarefavorable.

※

Thewatchmayfailtoreceiveradiosignals

dependingonthereceptionconditions(weather,

geographiclocations,radiodisturbancessuch

astallbuildings,andorientationofthewatch).



→

Environmentsinwhichitisdi󰮐culttoreceive

aradiosignalP.99

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

Thereceptionrangefromthetransmittingstationisapproximately1,500km(1,500km

radiusofthetransmittingstation).Therearefourtimezoneswithinthereceptionrange.

FortCollins

transmittingstation

(60kHz)

Approx.1,500km

Button A

Press once

and release

it.

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

■ About reception result display

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

seconds.

How to check the reception results

Press Button A once and release it.

Thesecondhandindicatesthereception

results.

2. Check if the reception was

successful (within ve seconds).

Ifthereceptionwassuccessful: Y

(the 10-second position)

BPC

JJY

Ifthereceptionfailed: N

(the 20-second position)

※

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

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

■ To Improve radio signal reception

・

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

window.

Theantennaisembeddedatthe9o’clockpositionofthewatch.Turningtheantenna

towardtheoutsideofawindoworthedirectionfacingtransmittingstationshelpsimprove

radiosignalreception.

※

Locationsoftransmittingstations

→

RadioSignalReceptionRangeIndicationP.93-95

・

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

Toenhancethereceptionofradiosignals,donotmovethewatchordonotchangethe

orientationofthewatchwhileitisreceivingradiosignals.

※

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

radiosignal,thereceptionwillbecancelled.

・

The place where the watch is put before going to bed

Placethewatchnexttoawindowfacinginthedirection

ofatransmittingstationbeforebedtimebecause

automaticreceptionisperformedlateatnight.Also,

pleasesearchforaplacetoeasilyreceiveradiosignals

whenattemptingmanualreception.

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

Antenna

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

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

・

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

※

Ifeitherthetimeordateisincorrect,evenwhensuccessfullyreceivingaradiosignal

→

“Misalignmentofthetimeandhandpositions”onP.132and“Misalignmentofthedate”onP.133in

Troubleshooting

■ 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.99.

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

→

AboutreceptionconditionsonP.93

・

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U.S.A,thesignalreception

functionwillnotwork.Checkthetimezonesetting

→

HowtoselectthetimezoneonP.86

・

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.

・

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

thewatchcannotsuccessfullyreceiveradiosignals,manuallysetthetimeanddate.

→

HowtomanuallysetthetimeP.122

→

HowtomanuallysetthedateP.124

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

・

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

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

Avoid putting the watch

in such places when it

receives radio signals.

100

・

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.

・

Websitesoftransmittingstations(asofDecember2017)

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

China: NTSC　http://www.ntsc.ac.cn

TheU.S.A:

 NIST　

https://www.nist.gov/pml/time-and-frequency-division/radio-stations/wwvb

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

CAUTIONS

102

■ How to charge the watch

Exposethedialtolighttochargethewatch.

About charging

※

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.

SolarChargingFunction

101

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

103

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.“1.Checkingthechargingstatus”P.82

※

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.

Illumination

lx (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 －－ 5hours

700

Fluorescentlight

Generalo󰮐ces －－ 3hours

1,000

Fluorescentlight

30W70cm － 120hours 2hours

3,000

Fluorescentlight

30W20cm 90hours 30hours 30minutes

5,000

Fluorescentlight

30W12cm 70hours 24hours 24minutes

10,000

Fluorescentlight

30W5cm 25hours 8hours 9minutes

10,000 Sunlight Cloudyday 25hours 8hours 9minutes

100,000 Sunlight

Sunnyday

（Underthedirectsunlight

onasummerday）

8hours 2hours 3minutes

SolarChargingFunction

104

■ Energy depletion forewarning 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ve-secondintervalmovement,followedbyacompletelystoppedstate.

Iftheenergydepletionforewarningfunctionisactivated,chargethewatchsu󰮐ciently.

Howtochargethewatch･････　P.102

Standardchargingtime･･･････　P.103

※

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

ondintervals(thisisnotamalfunction).

※

Whilethesecondhandmovesatve-secondintervals,thehourandminutehands,aswellasthedate,stop

operating.

※

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

cally.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.92.)

About energy

SolarChargingFunction

106

Thecasebackshowsthecaliberand

performance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.106.

WaterresistanceP.107.

●

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crown.(Noneedtopulloutthescrew

locktypecrown.)

→

CrownP.81

ToPreservetheQualityofYourWatch

Daily care Performance and type

※

Thegureaboveisone

example.Performanceof

yourwatchisdi󰮏erent

fromtheabovesample.

Waterresistant

performance

RefertoP.107

Calibernumber

Thenumbertoidentify

thetypeofyourwatch

Magneticresistant

performance

RefertoP.108

105

■ Power save function

Thiswatchisequippedwithapowersavefunctionwhichcansuppressenergyconsump-

tionwhenitisleftwithoutreceivinganadequatelightsourceforacertainlengthoftime.

※

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

Power Save 1 Power Save 2

Condition

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alightsourceforoverve

seconds,orwhenabuttonispressed,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.

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.92)

Thesecondhandstopspointing

atthe15-secondposition,and

thehourandminutehands,as

wellasthedate,alsostop.

Thesecondhandstopspointing

atthe45-secondposition,and

thehourandminutehands,as

wellasthedate,alsostop.

Thewatchconducts

automaticradiosignal

receiving.

Thewatchdoesnot

conductautomaticradio

signalreceiving.

SolarChargingFunction

107

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.106”)

Indicationon

thecaseback

Waterresistant

performance Conditionofuse

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

WATER

RESISTANT

Waterresistancefor

everydaylife

Thewatchwith-

standsaccidental

contactwithwater

ineverydaylife.

WARNING

Not

suitablefor

swimming

WATER

RESISTANT

5BAR

Waterresistancefor

everydaylifeat5

barometricpressures

Thewatchissuitableforsportssuchas

swimming.

WATER

RESISTANT

10(20)BAR

Waterresistancefor

everydaylifeat10(20)

barometricpressures.

Thewatchissuitablefordivingnotusinganair

cylinder.

Water resistance

108

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.126)

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

Ifthewatchbecomesmagnetizedanditsaccuracydeterioratestoanextentexceedingthespec-

i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.

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110

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

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109

ToPreservetheQualityofYourWatch

Examples of common magnetic products that may a󰮏ect watches

Smartphone,cellularphone,

tabletterminal(speaker)

Bag

(withmagnetbuckle)

AC-powered

shaver

Portableradio

(speaker)

Magnetic

cookingdevice

Magnetic

necklace

Magnetic

healtpillow

ACadapter

111

●

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.

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112

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.

A B

Special clasps

A Type 　→P.113 B Type　→P.114

C Type 　→P.115

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114

B Type

●

How to wear or take o󰮏 the watch

1. Pressthebuttononbothsidesoftheap;

pullthebuckleup.Thebandwillautomati-

callycomeoutoftheloop.

Fixed loop

Moveable

loop

Push

button

Flap

Buckle

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

loopandxed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.

Fixed loop

Moveable

loop

Push

button

Flap

Buckle

2. Pressthepushbuttonsagaintounfasten

theap.

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113

A Type

※

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

1. Liftuptheclasptoreleasethebuckle.

Moveable loop

Fixed loop Flap

Buckle

2. Opentheap.

3. 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.

Pin Adjustment hole

4. Closetheap.

※

Donotpushtheapintoohard.

115

ToPreservetheQualityofYourWatch

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

band.Slidethebandtoadjustitslength

andndanappropriatehole.Placethepin

intothehole.

Pin Adjustment

hole

4. Fastentheap.

1. Pressthebuttononthebuckle,andliftto

opentheclasp.

Push button

2. 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.

Adjustment hole

Pins

Buckle

C Type

116

※

Overchargepreventionfunction

Whenthesecondarybatteryisfullycharged,theoverchargepreventionfunctionisautomaticallyactivated

toavoidfurthercharging.Thereisnoneedtoworryaboutdamagecausedbyoverchargingnomatterhow

muchthesecondarybatteryischargedinexcessofthe“timerequiredforfullychargingthewatch”.

※

Referto“Standardchargingtime”onP.103tocheckthetimerequiredforfullychargingthe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bat-

tery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

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118

●

Notes on guarantee and repair

・

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

・

Withintheguaranteeperiod,presentthecerticateofguaranteetoreceiverepairservices.

・

Guaranteecoverageisprovidedinthecerticate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.

●

Replacement parts

・

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.

●

Inspection and adjustment by disassembly and cleaning (overhaul)

・

Periodicinspectionandadjustmentbydisassemblyandcleaning(overhaul)isrecommendedapproximatelyonceevery3to4years

inordertomaintainoptimalperformanceofthewatchforalongtime.Accordingtouseconditions,theoilretainingconditionofyour

watchmechanicalpartsmaydeteriorate,abrasionofthepartsduetocontaminationofoilmayadvanceordelaythetimesignicantly,

orthewatchitselfmaystop.Asthepartssuchasgasketmaydeteriorate,water-resistantperformancemaybeimpairedduetointru-

sion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.

After-sale service

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117

ToPreservetheQualityofYourWatch

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℃.

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.

※

TheabovecommentsareappliedtothewatchwithLumibrite.

※

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.

NOTICE

Lumibrite

119

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

1. Put the watch down.

Placethewatchwhereitcan

easilyreceiveradiosignals.

Theantennaisembed-

dedatthe9o’clock

positionofthewatch.

Turningtheantenna

towardtheoutsideofa

windowhelpsimprove

radiosignalreception.

→



ToImproveradiosignalreceptionP.98

→



Environmentsinwhichitisdi󰮐cultto

receivearadiosignalP.99

※



Thiswatchisunabletoreceiveradio

signalsoutsideareceptionrange.



→



AboutreceptionconditionsP.93

Press and hold Button A until the second hand

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



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

andstops,thewatchwillstarttoreceiveradiosignals.

Button A

Press and

hold for 3

seconds.

※



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

andtheU.S.A,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.86

Troubleshooting

Continued on the next page.

120

Troubleshooting

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.

<Displaybeforecompletingthereception>

Thesecondhandindicatesthereceptionlevel.

(Updatedeveryminute)

ReceivingLevel

High:(H) Low:(L)

Display

Radiosignalcondition

Easytoreceive Hardtoreceive

※

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

minutehandadvancesbyoneminute.

When the second hand starts

moving in one-second intervals,

check if the signal reception

was successfully conducted.

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

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

→

AboutreceptionresultdisplayP.96

※

Duringmovementofthedate,neitherthe

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

<Ifthereceptionhasfailed>

Thesecondhandindicatesthe

receptionresultbypointingtoN.

Receptionresult:N

Afterveseconds,thewatchreturns

totheTIMEdisplaymode.

→

Ifreceptionhasfailed:Thesecondhand

pointstoN.P.97

122

■ How to manually set the 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.

→

AboutreceptionconditionsP.93

・

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.92

・

Whenadjustingthetime,thedatewillbeaccordinglyadjusted.

※

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).

※

Whenthewatchreceivesaradiosignalaftermanualadjustmentofthetime,itdisplaysthereceivedtime.

Troubleshooting

121

Troubleshooting

When the watch is unable to receive radio signals

Whenthewatchisunabletoreceiveradiosignals,refertothefollowing

pagesforremedies.

・

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

→

At trouble Reception of a radio signal P.131

Iftheaboveremediesdonotsolvetheproblem,setthetimeanddatereferringtothe“How

tomanuallysetthetimeordate”sectionbelow.

→

HowtomanuallysetthetimeP.122

→

HowtomanuallysetthedateP.124

※

Forthesignalreceptionrange,refertoRadioAboutreceptionconditionsP.93.

・

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.86

Whenthewatchisunabletodisplaythecorrecttimeanddate,evenifthetimezoneis

selected,manuallysetthetimeanddate.

123

Troubleshooting

※

Unlockthecrownbeforeoperatingitandthen,

relockitaftercompletingtheoperation.

→

P.81

※



Whenthewatchentersthemanualtimesetting

mode,thereceptionresultswillbeindicatedas

“N,”sincethereceptionresultsdatawillbelost.

※



Thepointinwhichthedatechangesat0:00AM

(12:00PM).Adjustthetimetakingintoconsider-

ationthatitissetduringtheAMandPM.

1. Pull out the crown to the second

click.

Thesecondhandmovestopointtothe

0-secondpositionandthewatchenters

themanualtimesettingmode.

2. Press Button A to set the time.

Oneminute

Advance

Pressthebuttononceandthenreleaseit.

Continuous

Advance

Whenthebuttoniskeptpressedfortwo

secondsorlonger,thehandwillstartto

move.Pressthebuttonagaintostop.

※

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

Push the crown back in

simultaneously with a time signal.

Operationhasbeencompleted.

Thewatchresumesitsnormalmovement.

Button A

for clockwise

turn

012

124

Troubleshooting

Pull out the crown to the rst click.

Thisinitiatesthemodeformanuallyadjust-

ingthedate.

■ How to manually set the date

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.

・

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.92

※



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

※

Ifthedateremainsincorrectevenafterasuccessfulradiosignalreception,thepreliminarypositionofthe

datemaybemisaligned.

→

HowtocorrectthepreliminarypositionsP.127

※

Unlockthecrownbeforeoperatingitandthen,

relockitaftercompletingtheoperation.

→

P.81

012

126

Preliminary position

Whenthewatchisunabletodisplaytheprecisetimeordate,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.

・

In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.

→



Examplesofcommonmagneticproductsthatmaya󰮏ectwatchesP.109

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.”

■ Automatic Hand Position Adjustment Function (Function to automatically

adjust the preliminary position of the hour and minute hands)

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a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.

※



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



→

SettingthepreliminarypositionofthedateP.127

■ Setting the preliminary position of the date

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

→

SettingthepreliminarypositionofthedateP.127

Troubleshooting

125

Troubleshooting

2. Press Button A to set the date.

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.

3. Push the crown back.

Theoperationisnowcompleted.

012

Button A

Press

127

How to correct the preliminary positions

■ Setting the preliminary position of the date,

hour and minute hands

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

Thepreliminarypositionsofthehourandminute

handsare“0:00AM.”

Whenthepreliminarypositionsareincorrect,thecorrecttimeanddatecannot

bedisplayedevenifthewatchreceivesradiosignals.

Insuchacase,bycorrectingthepreliminarypositions,thelossorgainofthe

timeordatecanbecorrected.

Whenthenumericalnumberofthedateisnotlocatedatthecenterofthewindow,itcanbe

correctedbythesameproceduresasmentionedabove.

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

Troubleshooting

128

■ Setting the preliminary position of the date, hour and minute hands (continued)

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

※

Ifthewatchisleftuntouchedfor10secondsafterthedatestops,thewatchautomaticallyreturnstothe

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

Troubleshooting

Keep pressing down Button A and B (for 3

seconds) at the same time until the second

hand stops pointing to the 13-second position.



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

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

※



First,pressButtonB,andsubsequentlypressButtonAwhileholdingdown

ButtonBsoastopressbothofthemsuccessfully.

※



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

Within 10 seconds after the date stops,

press Button B to set the date to “1.”

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procedure3.

Toadvance

rapidly

Keeppressingdownthebuttonforlongerthan

2seconds.Pressthebuttononceagaintostop.

Tone-

tune

Whenthebuttonispressedintermittently,

thehandwillslightlyadvance.

※

Donotpullthecrownout.

※

PressButtonBwithyourngerorwithan

objectwithalongtaperedtip.

→

P.80

Button A

Press for

3 seconds

Button B

Press for 3 seconds

Press within 10

seconds after the

date stops

130

Troubleshooting

Condition Solutions

Reference

pages

Hand

Movement

Thesecondhandmoves

attwo-secondintervals.

Theenergydepletionforewarningfunctionisactivated.(P.104)

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.104

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.105)

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

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

－

Thestoppedsecondhand

pointingtothe45-second

positionstartedoperating.

Thepowersavefunctionhasbeenactivated.(P.105)

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.102

P.91

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.105)

Theautomatichandpositionadjustmentfunctionwas

activated.(P.126)

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

－

At trouble

129

Troubleshooting

Keep pressing down Button A (for 2 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procedure5.

Press Button B once and release it.



Thehourandminutehandsstarttomoveandstoppointingat“0:00am.”

After completing the operation, leave

the watch untouched for 10 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anddatearecorrect.

Ifthetimeanddatearenotcorrect,manuallysetthem.

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

Howtoconductmanualreception→P.119

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

Howtomanuallysetthetime

→

P.122

Howtomanuallysetthedate

→

P.124

Button A

Press for

2 seconds

Button B

Press

once

131

Troubleshooting

Condition Solutions

Reference

pages

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).

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.98

P.119

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

P.98

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

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

Checkthewebsiteofeachtransmittingstationforfurther

informationconcerningatransmissionstop.Attemptto

receivearadiosignalagainafterawhile.

P.100

Reselectthetimezoneabletoreceivetheradiosignal.

P.86

P.93

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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.103

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

condition.

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

built-inIC.

P.134

132

Troubleshooting

Condition Solutions

Reference

pages

Misalignment

of the time

and hand

positions

Thewatchtemporarily

gainsorlosestime.

1.

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

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

P.98

P.119

1.

Incasethewatchhasbeenleftinaplacewithanextremelyhigh

orlowtemperatureforalongtime,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.

P.119

3.

Ifthewatchcannotresumenormalmovementevenafterconductingtheabove

mentionedprocedures,consulttheretailerfromwhomthewatchwaspurchased.

－

Thewatchdisplaysan

incorrecttimehourunit,even

thoughitdisplaystheprecise

timeofminutesandseconds

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

placewhereyouusethewatch.

P.86

Thereceptionresultsare

successful,buttheprecise

timeisnotdisplayed.

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.

P.126

P.122

P.134

Thesecondhand

positionisnotcorrectly

alignedin“thereception

resultsdisplay”or“the

receptionleveldisplay.”

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.

134

Troubleshooting

In case of an abnormal movement

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3. andthensetthepreliminarypositionsandselectthetimezone.

■ How to reset the built-in IC

※

Unlockthecrownbeforeoperatingitandthen,

relockitaftercompletingtheoperation.

→



P.81

(NOTE)First,pressButtonB,andsubsequentlypress

ButtonAwhileholdingdownButtonBsoasto

pressbothofthemsuccessfully.

Pull out the crown to the second click.



Thesecondhandstopsatthe0-secondposition.

Keep pressing down Button A and B at the same

time for 3 seconds, and then release them.



Within5secondsafterreleasingthebuttons,thesecond

handmakesafullrotationandstopspointingtothe0-second

position.Thenthehourandminutehandswillstarttomove

andstoppointingto12o’clock0minutes.

(NOTE)

When all the hands stop pointing to 12 o’clock

0 minutes and 0 seconds, push the crown back.



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

※



Afterthebuilt-inICisreset,thewatchissettothetimezoneLON.

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

・



Howtocorrectthepreliminarypositions　

→

P.127-129

・

Howtoselectthetimezone　

→

P.86-87

・



Howtoadjustthetime(forcedreceptionmethod)

→



P.119-120

Button A

Press for

3 seconds

Button B

Press for

3 seconds

012

133

Troubleshooting

Condition Solutions

Reference

pages

Misalignment

of the date

Thereceptionresults

aresuccessfulandthe

precisetimeisdisplayed,

butthedateisnot

correctlydisplayed.

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

P.127

Operation

Thecrownorbuttons

cannotbeoperated.

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

Whenthedatehandismovingrightafterasettingiscarriedoutbyacrownor

buttonoperation,afterthedatestops,thecrownandbuttonscanbeoperated.

P.102

Yougetlostin

themiddleofthe

operation.

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.

－

Others

Bluronthedialglasspersists.

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

－

※

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

135

Specications

1. Basic feature �� Basic watch with three hands (hour, minute and second hands), date display

Frequency of crystal oscillator

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

3. Loss/gain (monthly rate) �� 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℃).

Operational temperature range

�� Between −10℃ and +60℃

5. Driving systems �� Step motor (Hour and minute hands, second hand, and the date)

6. Power source �� Secondary battery, 1 piece

7. Duration of operation �� Approximately six months (Fully charged, and the Power Save is not activated).

※

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

for approximately one and a half years at maximum.

8. Time setting by receiving

the JJY-LF radio signal

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

※

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.

9. IC (Integrated Circuit) �� Oscillator, frequency divider and driving circuit C-MOS-IC, 3 pieces

※

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

Specications

Seiko 7B27 Operating instructions

Brand: Seiko

Model: 7B27

Category: Watches

Type: Operating instructions

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Seiko 7B27 Operating instructions

Seiko 7B27 Operating instructions

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