Citizen G910 User manual

Table of contents

Thank you for your purchase of this Citizen watch.

Before using the watch, read this instruction manual carefully to ensure correct use.

Parts identification . . . . . . . . . . . . . . . 2

Notes on modes of this watch. . . . . . . 4

Checking the reference position

of the hands . . . . . . . . . . . . . . . . . . 6

Adjusting the watch. . . . . . . . . . . . . . . 8

Adjusting the date . . . . . . . . . . . . . . .13

Adjusting the year/month. . . . . . . . .14

Using the chronograph . . . . . . . . . . .16

Checking the time by sounds

(Minutes repeater). . . . . . . . . . . .18

Adjusting the reference position . . .20

Using the tachymeter . . . . . . . . . . . .22

Notes on charging your watch . . . . .24

Troubleshooting . . . . . . . . . . . . . . . . .27

Precautions . . . . . . . . . . . . . . . . . . . . .30

Maintenance . . . . . . . . . . . . . . . . . . . .38

Information. . . . . . . . . . . . . . . . . . . . .39

Specifications . . . . . . . . . . . . . . . . . . .40

400

300

250

120

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180

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110

DEC

MON

TUE

WED

THU

FRI

SAT SUN

L.Y

10 2

618

JUN

AUG

APR

OCT

FEB

Parts identification

• The illustrations in this instruction manual may differ from the actual appearance of your watch.

Day indicator

Day indication

Hour hand

Passed year indication

Lower left button (C)

Month hand/Chronograph

minute hand

Chronograph second

hand

Minute hand

Upper right button (B)

24-hour hand

Crown

Second hand

Lower right button (A)

Date indication

Tachymeter

Year hand/

Chronograph hour hand

How to use the screw down crown and screw down push button

Some models feature a screw down crown and screw down push button.

Locking the crown and button prevents accidental operation. Unlock them when you

want to operate the watch.

Unlock Lock

Screw down

crown

Rotate the crown

counterclockwise until it

releases from the case.

After pushing the

crown in to the position

0, rotate the crown

clockwise while pushing

it in, and tighten firmly.

Screw down

push button

Rotate the locking screw

counterclockwise, and

loosen until it stops.

Rotate the locking screw

clockwise, and tighten

firmly.

• Unlocking is not required when a standard crown and button are equipped.

400

300

250

120

130

140

150

160

180

200

220

100

110

DEC

MON

TUE

WED

THU

FRI

SAT SUN

L.Y

10 2

618

JUN

AUG

APR

OCT

FEB

Notes on modes of this watch

There are two modes for hand indications in this watch; one is for checking the

calendar and the other is for using the chronograph.

For checking the calendar—Normal indication mode

Day indicator and indication

(common)

Hour hand (common)

Year hand and indication

Lower left button (C)

Pressing and holding this

button for two or more

seconds will engage the

chronograph indication

mode.

Minute hand (common)

24-hour hand (common)

Second hand (common)

Date indication

(common)

Month hand

400

300

250

120

130

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150

160

180

200

220

100

110

DEC

MON

TUE

WED

THU

FRI

SAT SUN

L.Y

10 2

618

JUN

AUG

APR

OCT

FEB

For using the chronograph—Chronograph indication mode

Day indicator and indication

(common)

Hour hand (common)

Chronograph hour hand

Lower left button (C)

Pressing and holding this

button for two or more

seconds will return the

normal indication mode.

Minute hand (common)

24-hour hand (common)

Second hand (common)

Date indication

(common)

Chronograph second

hand

Chronograph minute

hand

• In this manual, all the explanations start from the normal indication mode of this watch.

Checking the reference position of the hands

If the reference position is incorrect, the time and calendar are not indicated properly.

See the next page to confirm the correct reference position.

1. Ensure that the crown is in position 0when

the watch is in the normal indication mode.

2. Press and hold the lower right button (A)

for two or more seconds.

The current time of sub-watch is shown. For in-

depth information on the sub-watch, see page 8.

• Sub-watch is working though the hands do not move.

3. Press the lower right button (A) again.

The current reference positions of the following

items are shown: year hand, month hand,

chronograph second hand, and date indication.

4. Press any button to finish the checking.

• The normal indication mode resumes in two minutes

when no operation is done.

180

200

180

200

012

Crown position

400

300

250

120

130

140

150

160

180

200

220

100

110

DEC

MON

TUE

WED

THU

FRI

SAT SUN

L.Y

10 2

618

JUN

AUG

APR

OCT

FEB

400

300

140

150

160

180

200

100

L.Y

AUG

APR

OCT

FEB

TUE

WED

FRI

Notes on the correct reference position

The correct reference position for all the items is shown below. If items are not in the

correct reference position, refer to page 20 for the adjustment.

Year hand

(indicating 12:00)

Date indication

(indicating 1)

Month hand

(indicating 12:00)

Chronograph second

position

(indicating 12:00)

Adjusting the watch

This watch consists of two built-in clocks—the main-watch and the sub-watch.

Each controls the functions of the hands in a different manner.

For details on the assignment of the

functions to the main-watch and

the sub-watch, refer to the table to

the right.

The main-watch and sub watch are

adjusted separately.

If the sub-watch is not synchronized

to the main-watch, the tones of

the minutes repeater will not

synchronize with the time on the

main-watch (large hour and minute

hands).

Hands and indications Main-watch Sub-watch

Year/Minute/Second hands √

Day indication √

24-hour hand √

Year hand and indication √

Month hand √

Date indication √

Minutes repeater √

• This watch shows the year indication as the number of years passed since leap year. It is not the actual

year.

For the most accurate setting, first adjust the sub-watch and then synchronize the

main-watch with the time on the sub-watch.

1. Pull the crown out to position 2when the

second hand indicates 12:00.

Both the main-watch and the sub-watch stop,

and the current time of the sub-watch is shown.

012

Crown position

Continued to the next page

120

130

140

150

160

180

200

220

100

110

DEC

L.Y

10 2

618

2040

JUN

AUG

APR

OCT

FEB

120

140

150

160

180

200

100

DEC

L.Y

AUG

APR

OCT

FEB

e.g. When it is 10:09.

Minute hand of the

sub-watch

Hour hand of the

sub-watch

2. Adjust the hour and minute hands by

pressing the lower or upper right button (A

or B).

• Each time you press the lower or upper right button

(Aor B), the minute hand moves counterclockwise or

clockwise. The movement of the hour hand is linked

with the minute hand.

• If you press and hold the button, the minute and hour

hands move continuously.

• The chronograph second hand indicates the a.m. or

p.m. reference. When the hand points to 12, a.m. time

is indicated. When the hand points to 1, p.m. time is

indicated.

• While adjusting, year/month/date are not changed.

180

200

400

300

012

Crown position

WED

THU

FRI

SAT SUN

WED

FRI

AT SU

WED

THU

FRI

SAT SUN

WED

FRI

AT SU

In the morning

(a.m.) In the afternoon

(p.m.)

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