Seiko GPS SOLAR ASTRON 5X53 Assembly instructions

5X53
HANDY MANUAL
Printed in Japan
BSN5X53-A1811
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English
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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

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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

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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

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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