Seiko GPS SOLAR ASTRON 5X53 Assembly instructions

5X53
HANDY MANUAL
Printed in Japan
BSN5X53-A1811
<
English
>

1 2
For details, please read the
“5X53 (GPS Solar) Complete User Guide”
(https://www.seikowatches.com/global-en/customerservice/instruction/).
Please carefully read the
instructions in this Complete User
Guide before using the watch.
Length adjustment service for metallic bands is
available at the retailer from whom the watch was
purchased. If you cannot have your watch repaired
by the retailer from whom the watch was purchased
because you received the watch as a gift, or you moved
to a distant place, please contact SEIKO WORLDWIDE
SERVICE NETWORK.The service may also be available
on a chargeable basis at other retailers, however, some
retailers may not perform the service.
If your watch has a protective film for preventing
scratches, make sure to peel it off before using the
watch. If the watch is used with the film on it, dirt, sweat,
dust, or moisture may be attached under the film and
may cause corrosion.
CONTENTS
1. Features���������������3
2. Names of the parts ���������5
3. Check the charging status ������7
4. Time zone �������������� 9
5. Time zone display and list of time
zones around the world ������ 11
6. Time zone adjustment (to adjust the
time zone and time by GPS signal
reception) ������������� 13
7. Manual time adjustment (to adjust
only the time by GPS signal
reception) ������������� 15
8. Manual time zone selection (to set
the watch to the local time of the
destination in an airplane, etc.) �� 17
9. DST setting of the main-dial ���� 19
10. Manual time zone selection of the
sub-dial �������������� 21
11. DST setting of the sub-dial ����� 23
12. Switching between the main-dial
and sub-dial ������������ 25
13. When boarding (in-flight mode ( )) � 27
14. Leap second (Automatic leap second
reception function) �������� 29
15. Reception result display ������ 31
16. How to check when the time zone
information was configured for your
watch ��������������� 33

3 4
GPS signal reception
Features
This is a GPS solar watch.
This watch has the following features.
Standard Charging Time
This watch can be set to the precise
local time by just one button operation
anywhere in the world.
DST (Daylight Saving Time) is reflected
in the time that appears.
This watch quickly adjusts the time by
receiving GPS signals
from GPS satellites.
This watch responds to
a total of 39 time zones
around the world.
When the region or time
zone where the watch is
used is changed, please
carry out operation of
“time zone adjustment.”
1
GPS signal reception consumes a lot of energy. It is necessary to charge the watch by exposing it to light so
that the indicator hand points to the “middle” or “full” position. (If the charging status is displayed as “low,” the
reception will not start even with manual GPS signal reception.)
The figures of “Time required for charging the watch to start moving at one-second intervals” are estimations of time required to charge the stopped watch by
exposing it to light until it moves at steady one-second intervals. Even if the watch is partially charged for a shorter period, the watch will resume one-second-
interval movement. However, it may shortly return to two-second-interval movement. Use the charging time in this column as a rough guide for sufficient charging
time.
The required charging time slightly varies depending on the design and the dial color of the watch.
When the energy
stored in the watch
runs out completely,
it takes time to fully
charge the watch,
so please keep in
mind to charge the
watch regularly.
Solar charging Function
This watch operates by solar charging.
Expose the dial to light to charge the watch.
Once fully charged, the watch runs for
approximately 6 months.
Automatic time adjustment function
This watch automatically adjusts the time in
accordance with action patterns during use.
When the watch has sensed sufficient brightness
under an open sky, it automatically receives GPS
signals from GPS satellites. This function enables
the watch to automatically adjust the time precisely
even while you are
using the watch.
 This watch is
unable to receive
GPS signals
when the energy
stored in the
watch is low.
 Unlike navigation equipment, this GPS solar watch is not designed to constantly receive GPS signals from GPS satellites without any operation.
This watch receives GPS signals only in the time zone adjustment mode, automatic or manual time adjustment mode.
Illumination
lx (LUX)
Light
source
Condition
(Example)
From the state where the watch is
stopped (not charged)
In the state where the hand
moves (the watch is charged)
To fully charged To one-second interval
movement is secured
To move for one day
700
Fluorescent light General offices － － 3.5 hours
3,000
Fluorescent light
30W 20cm 420 hours 12 hours 1hours
10,000
Fluorescent light Sunlight Cloudy day 30W 5cm 11 5 hours 4hours 15 minutes
100,000
Sunlight Sunny day (Under the direct sunlight on a summer day)
50 hours 1.5 hours 10 minutes
1. Features

5 6
Names of the parts
2

Display of city name may vary depending on the model.
2. Names of the parts
Crown
Minute hand
Date
Day hand (day of the week)
Sub-dial AM/PM hand
Button A
Sub-dial
(12-hour system)
Button B
Hour hand
Indicator hand
Second hand

7 8
Indicator
display
Movement of
second hand Charging status Solution
1-second
interval
movement
low
The watch
is unable to
receive GPS
signals, but
has energy
to operate.
Charge the watch at least until
the indicator hand points to the
level position so that the watch is
able to receive GPS signals.
2-second
interval
movement
The watch
is unable to
receive GPS
signals, and
does not
have energy
to operate.
(The energy
depletion
forewarning
function is
activated.
Continue to charge the watch
at least until the indicator hand
points to the level position
so that the watch is able to
continuously operate and receive
GPS signals.
5-second
interval
movement
The charging status is
not displayed for the
in-flight mode
().
Reset the in-flight mode ( ) as
long as possible.
When the indicator hand points
to “low,” charge the watch
following the above.
Indicator
display
Charging
status Solution
full Reception is
allowed.
middle
Reception is
allowed, but
keep in mind
to charge the
watch.
3
The indicator hand position shows whether this watch is able or unable to receive GPS signals.
In addition, for the low charging state, the movement of the second hand shows the energy depletion state in
further detail.
Reception is
allowed
Reception is
not allowed
Check the charging status
3. Check the charging status

910
Time zone
4
Time zone
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, and presently, the time zone is
divided into 39 zones as of March 2018.
Further, DST (Daylight SavingTime) is individually
adopted in countries and regions.
DST (Daylight Saving Time)
Depending on the area, DST (Daylight SavingTime) is
individually set.
Daylight Saving Time, or summer time, is a system
to lengthen daylight time by advancing 1 hour when
daylight time is longer during 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 varies depending on
the country.
If the time zone adjustment is successful, data
regarding the adoption of DST (Daylight SavingTime)
for the country in which the GPS signals were received
is reflected in the time that appears.
Daylight SavingTime is subject to change owing to circumstances
of the country or region as of March 2018.
Coordinated UniversalTime
(UTC)
UTC is the universal standard time coordinated
through an international agreement. UTC is the
primary time standard for recording time around the
world. The time obtained by adding a leap second to
the “International Atomic Time (TAI)” is determined
based on the atomic clock around the world. It is
coordinated in order to compensate for deviations
from universal time (UT) which is astronomically
determined by the UTC.
4. Time zone

11 12
Time zone display and list of time zones around the world
5
The displays of city code and the time difference from
UTC are Subject to change depending on model.
“·” between figures of the display of time difference
shows that there is a time zone in that place.
The following list shows the relationship between
displays of the bezel and dial ring and time difference
from the UTC.
Please refer to the second hand positions below to set
the time zone or to check the time zone setting.
DST (Daylight SavingTime) has been adopted in countries marked with a ★.
In the Lord Howe Island time zone in Australia with a mark, the time is
advanced by 30 minutes while DST (Daylight SavingTime) is in effect.
This watch corresponds to DST in the Lord Howe Island time zone.
The time zone and adoption of DST (Daylight Saving Time) for each
region are current as of March 2018.
Representative city names…
28 cities among the total of 39 time
zones around the world
Time difference…
+14 hours ~ –12 hours
5. Time zone display and list of time zones around the
world
City
code
Display of time
difference
City name UTC
± hours
BJS 8 Beijing +8
—• PyongYang +8.5
—• Eucla +8.75
TYO 9 Tokyo +9
ADL •★Adelaide +9.5
SYD 10 ★Sydney +10
—•☆
Lord Howe
Island +10.5
NOU 11 Nouméa + 11
WLG 12 ★Wellington +12
—•★
Chatham
Islands
+12.75
TBU 13 Nuku’alofa +13
CXI 14 Kiritimati +14
—–12
Baker
Island –12
City
code
Display of time
difference
City name UTC
± hours
LON UTC ★London 0
PAR 1★Paris/
★Berlin +1
CAI 2 Cairo +2
JED 3 Jeddah +3
—•★Tehran +3.5
DXB 4 Dubai +4
—• Kabul +4.5
KHI 5 Karachi +5
DEL • Delhi +5.5
—• Kathmandu +5.75
DAC 6 Dhaka +6
—• Yangon +6.5
BKK 7 Bangkok +7
City
code
Display of time
difference
City name UTC
± hours
MDY – 11
Midway
islands
– 11
HNL –10 Honolulu –10
—•
Marquesas
Islands –9.5
ANC –9 ★Anchorage –9
LAX –8 ★Los Angeles –8
DEN –7 ★Denver –7
CHI –6 ★Chicago –6
NYC –5 ★New York –5
SDQ –4
Santo
Domingo
–4
—•★St. John’s –3.5
RIO –3 ★
Rio de
Janeiro –3
FEN –2
Fernando de
Noronha –2
PDL –1 ★Azores –1
Display of time zone
Display of
time difference

13 14
Continue to press Button B (3 seconds),
and then release it when the second hand
moves to the 30-second position
Go to a place where
GPS signals can be
easily received
1
Move to the outdoors
under an open sky
with good visibility.
2 3
Direct the watch face upward and
wait
<
Display during reception (= satellites
acquisition status)
>
The second hand indicates ease of
receiving (= number of GPS satellites
from which GPS signals are received).
Even when the hand points to 4 units or
more, reception may
not be allowed.

Please note that it may be difficult to receive
GPS signals while you are in motion.
To cancel the
reception, press
Button B.
When the second hand
points to “Y” or “N,”
reception is completed
4
The buttons cannot be
operated while the hour and
minute hands, indicator hand,
date, and day are moving.
The reception result is
displayed for 5 seconds.
If reception is successful,
the time and date are
adjusted.
The settings for the time
zone and DST (Daylight
SavingTime) are
reflected in the time that
appears.
When the second hand has reached
the 30-second position, reception is
started.
The indicator hand points to “4+.”
 While the indicator hand points to “low” or ,
reception is not started even with operation
for reception.
When the hand points to “low,” charge the
watch by expose to light.
When the hand points to , reset the in-
flight mode ( ).
It takes a maximum
of 2 minutes to
complete reception.
It depends on the
receiving conditions.
Second hand
position
25-second
Number of
satellites
5 units
 The larger the
number of acquired
satellites there
are, the easier it
is to receive GPS
signals.
The time zone where you are is localized to adjust the watch to the precise current time by just one button operation anywhere in the world.
This reflects the data regarding the adoption of DST (Daylight SavingTime) in the country that received the GPS signals.
The time automatically switches to adjust for the adoption and duration of DST (Daylight SavingTime) for countries that follow DST (Daylight SavingTime).
"Normal time" always appears for countries that do not adopt DST (Daylight SavingTime).
6
How to adjust the time zone
Time zone adjustment
Precautions on time zone adjustment
If the time zone is adjusted near a time zone boundary, the time of the adjacent time zone may be displayed.
In some areas the boundaries observed by the watch may not exactly correlate to the actual time zone markers on the land.
This does not indicate a malfunction.
In this case, set the time zone in the manual time zone setting mode.
When the time zone is adjusted while traveling on land, avoid time zone boundaries to carry out time zone adjustment in the
representative cities in the time zone whenever possible.
In addition, when the watch is used near time zone boundaries, make sure to check the time zone setting, and manually set the time zone as necessary.
Press for
3 seconds
May
receive
E
a
s
y
t
o
r
e
c
e
i
v
e
C
a
n
n
o
t
r
e
c
e
i
v
e
・
・
・
・
・
・
3 units
4 units
5 units
6 units
2 units
0 units
BPC
J
J
Y
Reception
result
display
Y: Successful
(8-second
position)
N: Failed
(52-second
position)
Display
State Use the watch
as it is.
6. Time zone adjustment (to adjust the time zone and
time by GPS signal reception)
Time zone adjustment (to adjust the time zone and time by GPS signal
reception)
Press
Button B

15 16
Manual time adjustment
How to manually adjust the time
Go to a place where
GPS signals can be
easily received
When the second hand points
to “Y” or “N,” reception is
completed
4
The reception result is
displayed for 5 seconds.
If reception is successful,
the time, date, and day are
adjusted.
3Direct the watch face upward
and wait
Continue to press Button A (3 seconds), and
then release it when the second hand moves
to the 0-second position
2
When the second hand has reached the
0-second position, reception is started.
The indicator hand points to “1.”
Move to the
outdoors under
an open sky
with good
visibility.
To acquire only time information,
the number of satellites necessary
for reception is one.
Number of
acquired
satellites
1 0
Display
State Easy to
receive
Cannot
receive
To cancel the reception, press
Button B.
Check that the reception is
successful after the watch returns
to the time display mode.
When the time is not correct
even if “Y” is displayed,
the time zone may not
correspond to the region
where you are. Check the
time zone setting.
The buttons cannot be operated
while the hour and minute hands,
indicator hand, date, and day are
moving.
Reception
result
display
Y: Successful
(8-second
position)
N: Failed
(52-second
position)
Display
State
Use the
watch as it is.
While the indicator hand points to “low” or ,
reception is not started even with operation for
reception.
When the hand points to “low,” charge the
watch by exposing it to light.
When the hand points to , reset the in-flight
mode ( ).
It takes up to one
minute to complete
reception.
The reception time
depends on the
reception conditions.
<
Display during reception (=
satellites acquisition status)
>
The second hand indicates ease
of receiving (= number of GPS
satellites from which GPS signals
are received).
1
The watch can be set to the precise current time of the currently set time zone.
(The time zone is not changed.)
7
Press
Button B
Press for
3 seconds
7. Manual time adjustment (to adjust only the time by
GPS signal reception)
Manual time adjustment (to adjust only the time by GPS signal
reception)

17 18
When you have selected a
new time zone, even if it was
“AUTO (automatic)” before
the time zone selection, it
switches to “DST (ON)” or
“ST (OFF).”
In places where the time zone cannot be adjusted, the time zone can be set manually.
Pull out the crown to the first
click
1
The second hand moves
to display the currently set
time zone.
Push the crown back in
3
The second hand returns
to the time display mode.
The indicator hand returns
to display the charging
status.
Turn the crown and set the second hand to the time zone of the destination
2
When the crown is turned,
the second hand moves to
the next zone.
The buttons cannot be
operated while the hour
and minute hands, indicator
hand, date, and day are
moving.
How to manually set the time zone
Turn the crown
clockwise to
advance 1 time
zone.
Turn the
crown counter
clockwise to
set back 1 time
zone.
< Display of the indicator
hand >
Displays ON/OFF setting of
DST (Daylight SavingTime).
8
Manual time zone selection
Hand
position
AUTO
(automatic)
ST
(OFF)
DST
(ON)
Display
8. Manual time zone selection (to set the watch to the
local time of the destination in an airplane, etc.)
Manual time zone selection (to set the watch to the local time of
the destination in an airplane, etc.)
012
Pull out
to the first
click
012
Push
back in