READ FIRST CONTENTS Complete User Guide 7X52 GPS SOLAR WATCH
CONTENTS ASTRON 7X52 GPS SOLAR 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 Complete User Guide before using it. Keep this Complete User Guide handy for easy reference. Length adjustment service for metallic bands is available at the retailer from whom the watch was purchased.
READ FIRST ASTRON 7X52 GPS SOLAR CONTENTS 1 HANDLING CAUTIONS CAUTIONS WARNING To indicate the risks of serious consequences such as severe injuries unless the following safety regulations are strictly observed. To indicate the risks of light injuries or material damages unless the following safety regulations are strictly observed. • Avoid wearing or storing the watch in the following places. • Immediately stop wearing the watch in the following cases.
READ FIRST ASTRON 7X52 GPS SOLAR CONTENTS 1 CAUTIONS WARNING Do not use the watch in scuba diving or saturation diving. Do not turn or pull out the crown when the watch is wet. 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.
READ FIRST ASTRON 7X52 GPS SOLAR CONTENTS 1 Features This is a GPS* solar watch. GPS is an abbreviation for Global Positioning System. For details, see P. 27 This watch has the following features. This watch can be set to the precise local time by just one button operation anywhere in the world. This watch quickly adjusts the time by receiving GPS signals from GPS satellites. Place where GPS signals can be easily received/ cannot be received P.
READ FIRST ASTRON 7X52 GPS SOLAR The following functions are included When the region or time zone where the watch is used is changed To set only the time The watch displays the precise time of the time zone that is set by operation of “manual time adjustment.” Adjust the time zone. The watch displays the precise local time. How to manually adjust the time P. 21 ~ 22 Check the time zone setting P. 16 Time zone adjustment P. 14 ~ 16 Time Zone P.
CONTENTS ASTRON 7X52 GPS SOLAR CONTENTS 2 CONTENTS 1. READ FIRST… …………………………………………………………………… 2 2. CONTENTS………………………………………………………………………… 6 5. DETAILED INFORMATION……………………………………………………… Mechanism by which the GPS watch sets time and date……………… Time zone… …………………………………………………………………… GPS signal reception… ……………………………………………………… Leap second (Automatic leap second reception function)… ………… 3.
BEFORE USE ASTRON 7X52 GPS SOLAR CONTENTS 3 Names of the parts Main-Dial Hour hand Minute hand Second hand Date Button B Button A Crown (Screw lock type) Indicator hand P. 34 P. 8 Keep the crown locked while you are wearing the watch. Sub-dial P.
BEFORE USE ASTRON 7X52 GPS SOLAR CONTENTS 3 Indicator hand display and reception result display Display of charging status Hand position F (full) Level position (middle) Display of receiving process Receiving process E (low) 1 (time adjustment) 4+ (time zone adjustment) Receiving leap second data Display Display Check the reception result P. 24 Automatic time adjustment P. 23 Manual time adjustment P. 21 ~ 22 Check the charging status. P. 10 How to charge the watch P.
BEFORE USE ASTRON 7X52 GPS SOLAR CONTENTS 3 Time zone display and list of time zones around the world The following lists show 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. The time zone of each region is as of January 2012. Daylight Saving Time (DST) is in effect in time zones with a mark.
BEFORE USE ASTRON 7X52 GPS SOLAR CONTENTS 3 Check the charging status 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. GPS signal reception requires a lot of energy. Keep in mind to regularly charge the watch by expose to light. About charging P.
BEFORE USE ASTRON 7X52 GPS SOLAR CONTENTS 3 About charging How to charge the watch Standard Charging Time Expose the dial to light to charge the watch. For an approximate time required to charge the watch, refer to the table below. GPS signal reception consumes a lot of energy. Keep in mind to charge the watch by expose to light so that the indicator hand points to the “level position (middle)” or “F (full).
BASIC OPERATION (HOW TO SET THE TIME/HOW TO RECEIVE GPS SIGNALS, ETC.) ASTRON 7X52 GPS SOLAR CONTENTS 4 Basic operation flow 1. Check the place where GPS signals can be easily received 2. Set the time zone and set the time and date Place where GPS signals can be easily received/Place where GPS signals cannot be received P.
BASIC OPERATION (HOW TO SET THE TIME/HOW TO RECEIVE GPS SIGNALS, ETC.) ASTRON 7X52 GPS SOLAR Place where GPS signals can be easily received/Place where GPS signals cannot be received There are places where GPS signals can be easily received and places where GPS signals cannot be received. Easy to receive • Outdoors under an open sky with good visibility Difficult to receive • The smaller the sky, the more difficult it is to receive GPS signals.
BASIC OPERATION (HOW TO SET THE TIME/HOW TO RECEIVE GPS SIGNALS, ETC.) ASTRON 7X52 GPS SOLAR CONTENTS 4 When the region or time zone where the watch is used is changed (Time Zone Adjustment) Time zone adjustment The time zone where you are is localized to adjust the watch to the precise current time by receiving GPS signals. The watch can be arbitrarily set to the local time by just one button operation at any time. How to adjust the time zone P.
BASIC OPERATION (HOW TO SET THE TIME/HOW TO RECEIVE GPS SIGNALS, ETC.) ASTRON 7X52 GPS SOLAR CONTENTS 4 How to adjust the time zone 1 Go to a place where GPS signals can be easily received Move to the outdoors under an open sky with good visibility. 2 Continue to press Button B (6 seconds), and then release it when the second hand moves to the 30-second position. Although the second hand moves to the 0-second position 3 seconds after pressing Button B, continue to press it.
BASIC OPERATION (HOW TO SET THE TIME/HOW TO RECEIVE GPS SIGNALS, ETC.) ASTRON 7X52 GPS SOLAR CONTENTS 4 Check the time zone setting. The currently set time zone is displayed for 5 seconds. Button C once and 1 Press then release it the time zone setting (within 5 2 Check seconds) The second hand indicates the currently set time zone. [Example] Time zone setting: +2 hours CAIRO The indicator hand indicates the ON/OFF setting of Daylight Saving Time (DST).
BASIC OPERATION (HOW TO SET THE TIME/HOW TO RECEIVE GPS SIGNALS, ETC.) ASTRON 7X52 GPS SOLAR CONTENTS 4 Check Daylight Saving Time (DST) setting Daylight Saving Time (DST) Daylight Saving Time (DST) setting is displayed for 5 seconds. 1 then release it Press Button A once and 2 (within 5 seconds) Check Daylight Saving Time (DST) setting The indicator hand indicates Daylight Saving Time (DST) setting. Press once and release it Depending on the area, Daylight Saving Time (DST) is individually set.
BASIC OPERATION (HOW TO SET THE TIME/HOW TO RECEIVE GPS SIGNALS, ETC.) ASTRON 7X52 GPS SOLAR CONTENTS 4 Set Daylight Saving Time (DST) Daylight Saving Time (DST) is not automatically changed. ON/OFF of the DST is not automatically changed over even with operation of time zone adjustment/manual time zone setting. When traveling to a region where Daylight Saving Time (DST) is not adopted from a region where it is adopted, turn off the DST setting.
BASIC OPERATION (HOW TO SET THE TIME/HOW TO RECEIVE GPS SIGNALS, ETC.) ASTRON 7X52 GPS SOLAR CONTENTS 4 When boarding (in-flight mode ( )) In-flight mode ( ) Set to the in-flight mode ( ). Set to the in-flight mode ( ) Start operation of 2 within 5 seconds after operation of 1. where the reception may influence When 5 seconds or longer have elapsed after operation of 1, the watch automatically returns to the time display mode.
BASIC OPERATION (HOW TO SET THE TIME/HOW TO RECEIVE GPS SIGNALS, ETC.) ASTRON 7X52 GPS SOLAR To set the watch to the local time of the destination in an airplane, etc. (Manual time zone setting) Manual time zone setting In places where the time zone cannot be adjusted, the time zone can be set manually. Place where GPS signals can be easily received/Place where GPS signals cannot be received P. 13 Set the time zone with reference to the “Time zone display and list of time zones around the world P.
BASIC OPERATION (HOW TO SET THE TIME/HOW TO RECEIVE GPS SIGNALS, ETC.) ASTRON 7X52 GPS SOLAR CONTENTS 4 To set only the time (manual time adjustment) Manual time adjustment The watch can be set to the precise current time of the currently set time zone. (The time zone is not changed.) How to manually adjust the time P. 22 Check the time zone setting P. 16 In the manual time adjustment, the precise time of the currently set time zone is displayed.
BASIC OPERATION (HOW TO SET THE TIME/HOW TO RECEIVE GPS SIGNALS, ETC.) ASTRON 7X52 GPS SOLAR CONTENTS 4 How to manually adjust the time 1 Go to a place where GPS signals can be easily received Move to the outdoors under an open sky with good visibility. 2 Continue to press Button B (3 seconds), and then release it when the second hand moves to the 0-second position. 3 4 Direct the watch face upward and wait When the second hand has reached the 0-second position, reception is started.
BASIC OPERATION (HOW TO SET THE TIME/HOW TO RECEIVE GPS SIGNALS, ETC.) ASTRON 7X52 GPS SOLAR CONTENTS 4 Automatic time adjustment This watch can be set to the precise current time by automatically receiving GPS signals by exposure to bright light outdoors under an open sky to adjust the time.
BASIC OPERATION (HOW TO SET THE TIME/HOW TO RECEIVE GPS SIGNALS, ETC.) ASTRON 7X52 GPS SOLAR CONTENTS 4 Check that reception was successful (reception result display) The type of reception and reception result (success or failure) of the last GPS signal reception is displayed for 5 seconds. 1 Press Button B once and then release it The second hand and indicator hand display the reception result.
BASIC OPERATION (HOW TO SET THE TIME/HOW TO RECEIVE GPS SIGNALS, ETC.) ASTRON 7X52 GPS SOLAR CONTENTS 4 Dual time display Respective times of two regions can be displayed by the dial and sub-dial. Example: Honolulu time and Japan time are respectively displayed by the dial and sub-dial. Dial: Local time (Honolulu) Honolulu time (UTC -10 hours): 15:10:42 Date: Day of 6th Sub-dial: Home time (Japan) Japan time: 10:10 (UTC +9 hours) How to set the sub-dial P.
BASIC OPERATION (HOW TO SET THE TIME/HOW TO RECEIVE GPS SIGNALS, ETC.) ASTRON 7X52 GPS SOLAR CONTENTS 4 How to set the sub-dial • The sub-dial displays the time in a 24-hour system. • Even when the time zone of the dial is changed, the time of the sub-dial is not changed. The sub-dial moves independently from the dial. 1 Unlock the crown Unlock the crown Turn the crown counterclockwise (downward) to unscrew it. Now the crown can be operated.
DETAILED INFORMATION ASTRON 7X52 GPS SOLAR CONTENTS 5 Mechanism by which the GPS watch sets time and date What GPS is GPS stands for Global Positioning System, a satellite positioning system for determining the current position on the earth. 24 satellites cover the earth, and at present, the system is operated by approximately 30 GPS satellites. Wherever you are in the world, the position can be determined (positioned) by information from more than 4 GPS satellites.
DETAILED INFORMATION ASTRON 7X52 GPS SOLAR CONTENTS 5 Time zone 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. Further, Daylight Saving Time (DST) is individually adopted in countries and regions.
DETAILED INFORMATION ASTRON 7X52 GPS SOLAR CONTENTS 5 GPS signal reception GPS signal reception includes three types. Features for each type are as follows. Reception method Display Time adjustment How to manually adjust the time P. 21 ~ 22 Automatic time adjustment P. 23 Time adjustment Features Precise current time of the set time zone is displayed Check the set time zone P. 16 GPS signal reception Q & A Leap second data reception Time zone adjustment How to adjust the time zone P.
DETAILED INFORMATION ASTRON 7X52 GPS SOLAR CONTENTS 5 Leap second (Automatic leap second reception function) Leap second The leap second is to compensate for deviations from the universal time (UT) which is astronomically determined and the “International Atomic Time (TAI). “1 second” may be added (deleted) once a year or every few years. Automatic leap second reception function A leap second is automatically added by receiving “leap second data” from GPS signals at the time of leap second addition.
IN CASE OF AN UNUSUAL MOVEMENT OF THE SECOND HAND ASTRON 7X52 GPS SOLAR CONTENTS 6 Second hand movement and watch state (energy depletion forewarning function) Movement of the second hand shows the state of the watch (working functions). 2-second interval movement/5-second interval movement are brought about When the energy stored in the watch runs low, the energy depletion forewarning function will work. When the energy stored in the watch runs low, charge the watch by expose to light.
IN CASE OF AN UNUSUAL MOVEMENT OF THE SECOND HAND ASTRON 7X52 GPS SOLAR The second hand stops at the 15-second position/45second position (Power save function) When the watch is not exposed to light for a long time, the power save function will work. Power Save 1 The second hand stops pointing at the 15-second position. Power Save 2 The second hand stops at the 0-second or 5-second position (automatic time adjustment) Automatic time adjustment is being performed. Automatic time adjustment P.
TO PRESERVE THE QUALITY OF YOUR WATCH ASTRON 7X52 GPS SOLAR CONTENTS 7 Daily care Performance and caliber / case number The case back shows the performance and caliber / case number 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. Water resistance Refer to P.
TO PRESERVE THE QUALITY OF YOUR WATCH ASTRON 7X52 GPS SOLAR CONTENTS 7 Screw-lock type crown The screw-lock type crown features a mechanism that can securely lock the crown when they are not being operated in order to prevent any operational errors and to improve its water resistant property. ● It is necessary to unlock the screw-lock type crown before operating it. ● Once you have finished operating the crown, make sure to relock it.
TO PRESERVE THE QUALITY OF YOUR WATCH ASTRON 7X52 GPS SOLAR CONTENTS 7 Water resistance Refer to the table below for the description of each degree of water resistant performance of your watch before using.
TO PRESERVE THE QUALITY OF YOUR WATCH ASTRON 7X52 GPS SOLAR CONTENTS 7 Magnetic resistance (Magnetic influence) Examples of common magnetic products that may affect watches This watch may be affected by nearby magnetism and temporarily gain or lose time or stop operating. Even when the watch gains or loses time due to magnetic influence, the hand positions are automatically adjusted by the “automatic hand position adjustment function.” (P.
TO PRESERVE THE QUALITY OF YOUR WATCH ASTRON 7X52 GPS SOLAR CONTENTS 7 Band 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 ● Polyurethane band • Moisture, sweat or soil will cause rust even on a stainless steel band if they are left for a long time.
TO PRESERVE THE QUALITY OF YOUR WATCH ASTRON 7X52 GPS SOLAR CONTENTS 7 How to use an adjustable three-fold clasp ● How to adjust the length of the leather band Some bands are provided with an adjustable three-fold clasp. If the clasp of the watch you purchased is as follows, please refer to the following instructions. 1 With pressing buttons on both sides of the flap, pull the leather band out of the moveable loop and fixed loop. Then open the clasp.
TO PRESERVE THE QUALITY OF YOUR WATCH ASTRON 7X52 GPS SOLAR CONTENTS 7 Lumibrite If your watch has Lumibrite Lumibrite is a luminous paint that is completely harmless to human beings and natural environment, containing no noxious materials such as radioactive substance. Lumibrite is a newly-developed luminous paint that absorbs the light energy of the sunlight and lighting apparatus in a short time and stores it to emit light in the dark.
TO PRESERVE THE QUALITY OF YOUR WATCH ASTRON 7X52 GPS SOLAR CONTENTS 7 Power Source The battery used in this watch is a special secondary battery, which is different from ordinary batteries. Unlike an ordinary silver oxide battery, the secondary battery does not require periodic replacement. Overcharge prevention function When the secondary battery is fully charged, the overcharge prevention function is automatically activated to avoid further charging.
TO PRESERVE THE QUALITY OF YOUR WATCH ASTRON 7X52 GPS SOLAR CONTENTS 7 標準化 After-sale service ● Notes on guarantee and repair ● Inspection and adjustment by disassembly and cleaning (overhaul) • Contact the retailer from whom the watch was purchased or SEIKO WORLWIDE SERVICE NETWORK for repair or overhaul. • Within the guarantee period, present the certificate of guarantee to receive repair services. • Guarantee coverage is provided in the certificate of guarantee. Read carefully and retain it.
TROUBLESHOOTING ASTRON 7X52 GPS SOLAR CONTENTS 8 When the watch is unable to receive GPS signals ● The second hand stops at the 45-second position before the reception is completed (The watch enters the power save 2 state) Points to be checked When the watch does not start receiving or is unable to receive GPS signals even with operation of GPS signal reception, the following can be considered.
TROUBLESHOOTING ASTRON 7X52 GPS SOLAR CONTENTS 8 How to manually set the time • When using the watch again under a condition in which the watch is able to receive GPS signals, receive GPS signals to set the time. • When adjusting the time, the date will be accordingly adjusted. 1 3 Unlock the crown Unlock the crown Screw-lock type crown P.
TROUBLESHOOTING ASTRON 7X52 GPS SOLAR CONTENTS 8 How to manually set the date When the date is not automatically changed under a condition in which the watch is unable to receive GPS signals (when changing from months with 30 days or less to months with 31 days), set the date manually. • The date can be set independently regardless of the time. • When using the watch again under a condition in which the watch is able to receive GPS signals, receive GPS signals to set the time and date.
TROUBLESHOOTING ASTRON 7X52 GPS SOLAR CONTENTS 8 When the time/date or indicator hand position is misaligned The preliminary position is misaligned due to the following reasons. Points to be checked ● Reception was successful (the reception result is displayed as “Y”), but time has gained or lost. • Check the time zone setting. Check the time zone setting P.
TROUBLESHOOTING ASTRON 7X52 GPS SOLAR Preliminary position of this watch The preliminary position of the date is “1” (1st). The preliminary position of the indicator hand is between “E” (low) and . The preliminary position of the hour/minute hands is “00:00 am.
TROUBLESHOOTING ASTRON 7X52 GPS SOLAR CONTENTS 8 4 Press Button B or C to adjust the indicator hand as shown in the figure Adjust the indicator hand to the position as shown in the figure. The preliminary position of the indicator hand is between “E” (low) and . If the indicator hand points as shown in the figure, go to operation of 5. Slightly moves the hand clockwise 5 Continue to press Button A (2 seconds) and release it when the second hand moves to the 0-second position.
TROUBLESHOOTING ASTRON 7X52 GPS SOLAR CONTENTS 8 In case of an abnormal movement (resetting the built-in IC) In the case that the watch moves abnormally or that the watch does not move at 1-second intervals even after fully charging the battery, perform the procedures from 1 to 9 to re-establish normal function. Reset the system (2 ~ 4) 2 3 Pull out the crown to the second click The second hand stops at the 13-second position.
TROUBLESHOOTING ASTRON 7X52 GPS SOLAR Set the date to “1” (1st) (5, 6) Set the indicator hand to “E” (7 ~ 9) If the date is stopped continuously for 1 minute or longer, the watch automatically returns to the time display mode. When the watch has returned to the time display mode, restart operation.
TROUBLESHOOTING ASTRON 7X52 GPS SOLAR CONTENTS 8 Set the time (0) 8 Press Button B or C to adjust the indicator hand as shown in the figure Adjust the indicator hand to the position as shown in the figure. If the indicator hand points as shown in the figure, go to operation of 9. Slightly moves the hand clockwise 9 When operation is completed, press Button A and then release it The mode to adjust the preliminary position is completed, and the second hand and hour/ minute hands start moving.
TROUBLESHOOTING ASTRON 7X52 GPS SOLAR CONTENTS 8 Troubleshooting At trouble The second hand moves at 2-second intervals. The second hand moves at 5-second intervals. Hand Movement Possible causes Reference pages Solutions The energy depletion forewarning function is activated. (P.
TROUBLESHOOTING ASTRON 7X52 GPS SOLAR At trouble Reference pages Solutions The charging status has been displayed as “E (low).” (P. 10) Charge the watch sufficiently until the charging status is displayed as the “level position (middle)” or “F (full).” The in-flight mode ( (P. 19) After relocation from a place under restriction on use of GPS signals (in an airplane, etc.), reset the in-flight mode ( ). P. 19 You are in a place where GPS signals cannot be received. (P.
TROUBLESHOOTING ASTRON 7X52 GPS SOLAR CONTENTS 8 At trouble The position of the second hand showing “reception result” and “number of acquired satellites from which GPS signals are received” is misaligned. Misalignment of time and hands The watch temporarily gains or loses time. The time is gained (lost) 1 hour Possible causes Solutions Reference pages The preliminary position of the second hand is misaligned.
TROUBLESHOOTING ASTRON 7X52 GPS SOLAR CONTENTS 8 Solutions Reference pages The amount of exposed light is too weak. The time for charging the watch is not sufficient. 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. 11 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.
TROUBLESHOOTING ASTRON 7X52 GPS SOLAR CONTENTS 8 At trouble Indicator hand misalignment The position of the hand showing the reception type, charging status, inflight mode ( ), and DST is misaligned The crown or buttons cannot be operated. Possible causes Solutions The automatic leap second reception function has been activated. (The second hand is stopped between the 0-second to 18-second positions.) It takes up to 18 minutes to complete the leap second reception.
FUNCTION LIST/SPECIFICATIONS ASTRON 7X52 GPS SOLAR CONTENTS 9 Index Functions to adjust the time Solar Charging Function… ………………… A solar cell underneath the dial converts any form P. 11 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 6 months. GPS signal reception P. 29 Time zone adjustment function…………… Identifies the time zone corresponding to the P.
FUNCTION LIST/SPECIFICATIONS ASTRON 7X52 GPS SOLAR CONTENTS 9 Function for reception SPECIFICATIONS In-flight mode ( )… ………………………… Function to prevent the GPS signal reception function from working. Set this mode when P. 19 boarding an airplane, etc. 1. Basic function………………………… Main-dial; three hands (hour/minute/second hands), date display, indicator hand, sub-dial; two hands (hour/ minute hands) Satellites acquisition status display function… … Displays by the second hand the number of GPS P.
