Casio 4390 Manual
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Casio 4390 Manual

Casio 4390 Manual

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MO0901-EA
Module No. 4390

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  • Page 1 MO0901-EA Module No. 4390...
  • Page 2 Getting Acquainted Congratulations upon your selection of this CASIO watch. To get the most out of your purchase, be sure to read this manual carefully. • Be sure to keep all user documentation handy for future reference. • • • • • This watch does not have a city code that corresponds to the UTC offset of –3.5 hours.
  • Page 3 Keep the watch exposed to bright light The electricity generated by the solar cell of the watch is Bright light stored by a built-in battery. Leaving or using the watch where it is not exposed to light causes the battery to run down.
  • Page 4 • The watch continues to operate, even when it is not exposed to light. Leaving the watch in the dark can cause the battery to run down, which will result in some watch functions to be disabled. If the battery goes dead, you will have to re-configure watch settings after recharging.
  • Page 5 • See “Power Saving” (page E-56) for more information. • The hands also stop when the watch’s battery runs down. Note that CASIO COMPUTER CO., LTD. assumes no responsibility for any damage or loss suffered by you or any third party arising through the use of this...
  • Page 6 About This Manual • Button operations are indicated using the letters shown Minute hand Hour hand in the illustration. • Each section of this manual provides you with the information you need in order to perform operations in each mode. Further details and technical information can be found in the “Reference”...

  • Page 7: Table Of Contents

    Contents General Guide ......................E-8 Radio-controlled Atomic Timekeeping ............... E-11 World Time ......................E-33 Configuring Time and Date Settings Manually ........... E-37 Auto Hand Home Position Correction ..............E-41 Manual Home Position Correction ..............E-44 Power Supply ......................E-47 Reference ......................E-53 Specifications .......................
  • Page 8 Procedure Lookup The following is a handy reference list of all the operational procedures contained in this manual. To specify your Home City ................... E-12 To check the current Home City STD/DST setting ..........E-14 To perform manual receive .................. E-28 To check the latest signal reception results ............
  • Page 9 To trigger the auto hand home position correction operation manually ..E-42 To recover from the sleep state ................E-57...

  • Page 10: General Guide

    General Guide Timekeeping Receive Status Manual Receive Setting Mode Mode Check (page E-30) (page E-28) (pages E-12, E-44) Press A. Hold down A for about two seconds. Press any button. Hold down A for about five seconds. Press A.
  • Page 11 • Press C to change the mode. • Except while the watch is performing auto hand home position correction, holding down C for about two seconds will return directly to the Timekeeping Mode.
  • Page 12 Timekeeping Mode World Time Mode (page E-33) Hour hand Minute hand Press C. Second hand Timekeeping Mode Operations • To check the current Home City setting by pressing D (page E-12) • To check the latest signal reception results by pressing A (page E-30) E-10...

  • Page 13: Radio-Controlled Atomic Timekeeping

    Radio-controlled Atomic Timekeeping This watch receives a time calibration signal and updates its time setting accordingly. • Supported time calibration signals: Germany (Mainflingen), England (Anthorn), United States (Fort Collins), China (Shangqiu), and Japan (Fukushima or Fukuoka/Saga) • See the information under “Signal Reception Troubleshooting” (page E-31) if you experience problems with time calibration signal reception.

  • Page 14: To Specify Your Home City

    To specify your Home City 1. Press C to enter the World Time Mode. 2. Use D to move the second hand clockwise to the city code you want to use as your Home City. • Note that it can take as long as one minute for the hands to move to the applicable time.
  • Page 15 3. Hold down A for about two seconds to toggle the current Home City between standard time (STD) and daylight saving time (DST). • See “To change the STD/DST setting of a particular city code” (page E-35) for details. 4. After the settings are the way you want, hold down B for about three seconds until the watch returns to the Timekeeping Mode.

  • Page 16: To Check The Current Home City Std/Dst Setting

    To check the current Home City STD/DST setting 1. In the Timekeeping Mode, press D. This will cause the second hand to move to the current Home City setting. 2. The second hand will move to either STD (standard time) or DST (daylight saving time) after about two seconds or if you press D.
  • Page 17 Home City Code Transmitter Frequency LON: London German/U.K. Signals 60.0 kHz PAR: Paris Anthorn (England) 77.5 kHz ATH: Athens Mainflingen (Germany) China Signal HKG: Hong Kong 68.5 kHz Shangqiu City (China) Japan Signals 40.0 kHz TYO: Tokyo Fukushima (Japan) 60.0 kHz Fukuoka/Saga (Japan) (HNL): Honolulu U.S.
  • Page 18 • City codes in parentheses indicate areas where reception may be possible only when conditions are good. • For full information on city codes, see the “City Code Table” at the back of this manual. • In addition to the above, you also can select city codes that are outside the ranges of the time calibration signal transmitters supported by this watch.
  • Page 19 Approximate Reception Ranges U.K. and German Signals 1,500 kilometers Mainflingen Anthorn U.S. Signal 500 kilometers 2,000 miles (3,000 kilometers) The Anthorn signal is receivable within this 600 miles area. (1,000 kilometers) Fort Collins E-17...
  • Page 20 Japan Signals 500 kilometers 500 kilometers Fukuoka/Saga Fukushima 1,000 kilometers 1,000 kilometers Changchun China Signal 1,500 kilometers 500 kilometers Beijing Shanghai Chengdu Hong Kong Shangqiu E-18...
  • Page 21 • Signal reception may not be possible up to the distances noted below during certain times of the year or day. Radio interference may also cause problems with reception. Mainflingen (Germany) or Anthorn (England) transmitters: 500 kilometers (310 miles) Fort Collins (United States) transmitter: 600 miles (1,000 kilometers) Fukushima or Fukuoka/Saga (Japan) transmitters: 500 kilometers (310 miles) Shangqiu (China) transmitter: 500 kilometers (310 miles) •...
  • Page 22 Daylight Saving Time (DST) Daylight Saving Time (summer time) advances the time setting by one hour from Standard Time. Remember that not all countries or even local areas use Daylight Saving Time. • Note that the start and end of daylight saving time, and whether it is used at all depends on each country and geographic area.
  • Page 23 • The watch will not adjust the DST setting automatically while either of following city codes is selected as the Home City. In this case, you will need to change between standard time and daylight saving time manually. HKG, HNL •...
  • Page 24 Time Calibration Signal Reception There are two different methods you can use to receive the time calibration signal: auto receive and manual receive. • Auto Receive With auto receive, the watch receives the time calibration signal automatically up to six times a day (five times for the China signal).
  • Page 25 Important! • When getting ready to receive the time calibration signal, position the watch as shown in the nearby illustration, with its 12 o’clock side facing towards a window. This watch is designed to receive a time calibration signal late at night. Because of this, you should place the watch near a window as shown in the illustration when you take it off at night.
  • Page 26 • Proper signal reception can be difficult or even impossible under the conditions listed below. Among or Inside or Inside a Near a Near high- Near behind among vehicle construction tension power household mountains buildings site, airport, lines appliances, or other office sources of equipment,...
  • Page 27 About Auto Receive The watch receives the time calibration signal automatically up to six times a day (five times for the China signal). When any auto receive is successful, the remaining auto receive operations are not performed. The reception schedule (calibration times) depends on your currently selected Home City, and whether standard time or Daylight Saving Time is selected for your Home City.
  • Page 28 Your Home City Auto Receive Start Times Standard Time 1:00 am 2:00 am 3:00 am 4:00 am 5:00 am Midnight* Daylight 2:00 am 3:00 am 4:00 am 5:00 am Midnight* 1:00 am* Saving Time Standard Time 2:00 am 3:00 am 4:00 am 5:00 am Midnight*...
  • Page 29 Note • When a calibration time is reached, the watch will receive the calibration signal only if it is in either the Timekeeping Mode or World Time Mode. Reception is not performed if a calibration time is reached while you are configuring settings. •...

  • Page 30: To Perform Manual Receive

    To perform manual receive 1. Place the watch on a stable surface so its 12 o’clock side is facing towards a window (page E-23). 2. In the Timekeeping Mode, hold down A for about two seconds. 3. The second hand will move to READY (R) to indicate that the watch is setting up for time calibration reception.
  • Page 31 • If reception is successful, the second hand will move to YES (Y), and the date and time settings will be adjusted accordingly. Normal timekeeping will resume after that. YES (Y) NO (N) Note • To interrupt a receive operation and return to the Timekeeping Mode, press any button.

  • Page 32: To Check The Latest Signal Reception Results

    Viewing the Latest Signal Reception Results You can use the procedure below to check whether or not the last signal receive operation was successful. To check the latest signal reception results In the Timekeeping Mode, press A. • If the watch was able to perform a successful signal receive operation since midnight, the second hand will move to YES (Y).
  • Page 33 Signal Reception Troubleshooting Check the following points whenever you experience problems with signal reception. Problem Probable Cause What you should do • You changed the time setting • Perform manual signal The second hand is pointing manually. receive at night or wait until •...
  • Page 34 Problem Probable Cause What you should do • The Home City setting is not • Select the correct Home The time setting is incorrect correct for the area where you are City (page E-12). • Enter the home position following signal using the watch.

  • Page 35: World Time

    World Time World time lets you display the current time in any one of 29 cities (29 time zones) around the world. • If the current time is not correct, check your current Home City settings and make adjustments as required (page E-37).

  • Page 36: To Search For A City

    To search for a city In the World Time Mode, press D to move the second hand (which is pointing at the currently selected city code) clockwise. • About one second or so after you release D, the hands of the watch will move to the current time in the zone of the city code indicated by the second hand.

  • Page 37: To Change The Std/Dst Setting Of A Particular City Code

    To change the STD/DST setting of a particular city code 1. In the World Time Mode, use D to select the city whose setting you want to change. 2. Hold down A for about two seconds to toggle between daylight saving time and standard time. •...

  • Page 38: To Check The Std/Dst Setting For A World Time Mode City

    To check the STD/DST setting for a World Time Mode city 1. In the World Time Mode, use D to select the city whose setting you want to check. 2. Press A and the second hand will move to either STD or DST. •...

  • Page 39: Configuring Time And Date Settings Manually

    Configuring Time and Date Settings Manually You can use the following procedures to adjust the time and date settings when the watch is unable to receive a time calibration signal for some reason. 1. In the Timekeeping Mode, keep A depressed (for about five seconds) as the second hand moves to the last signal reception result (Y or N), then to READY (or R for some models), and then AM or PM.
  • Page 40 3. Use D (+) and B (–) to change the time setting in one-minute increments. 4. Press C to advance to the year tens digit setting. E-38...
  • Page 41 5. Press D to increase the year tens digit by one. Second 6. Press C to advance to the year ones digit setting. hand 7. Press D to increase the year ones digit by one. Second 8. Press C to advance to the month setting. hand E-39...
  • Page 42 9. Press D to move to the next month. 10. Press C to advance to the day setting. Second hand 11. Use D (+) and B (–) to change the day setting. 12. When everything is the way you want, press A. •...

  • Page 43: Auto Hand Home Position Correction

    Auto Hand Home Position Correction Strong magnetism or impact can cause the hands and/or day setting to be off, even if the watch is able to perform the signal receive operation. Auto hand home position correction corrects the hand position automatically. •...
  • Page 44 To trigger the auto hand home position correction operation manually • Perform the following procedure when the time setting is off. In the Timekeeping Mode, hold down B for about six seconds until the second hand completes one full revolution. •...
  • Page 45 The manually triggered auto home position correction operation performs the following two steps. 1. The hands will move automatically in order to determine the home positions of the watch. 2. After the hand home positions are determined, the watch will return to normal timekeeping automatically.

  • Page 46: Manual Home Position Correction

    Manual Home Position Correction Strong magnetism or impact can cause the hands and/or day setting to be off, even if the watch is able to perform the signal receive operation. If this happens, perform the following home position correction procedure. •...
  • Page 47 4. Press C to change to hour and minute hand Hour hand Minute hand correction. • This will cause the hour and minute hands to their home positions. • Home Positions Hour hand: 12 o’clock Minute hand: 12 o’clock 5. Use D (+) and B (–) to correct the hour and minute hands.
  • Page 48 6. Press C to change to day correction. • This causes the day to move to its home position. • Home Position Day: 1 7. Use D (+) and B (–) to correct the day indication. • Each press of D or B moves the day indicator very slightly.

  • Page 49: Power Supply

    Power Supply This watch is equipped with a solar cell and a special rechargeable battery (secondary battery) that is charged by the electrical power produced by the solar cell. The illustration shown below shows how you should position the watch for charging. Example: Orient the watch so its face is pointing at a light source.
  • Page 50 If you experience problems getting the special rechargeable battery to charge fully, contact your dealer or CASIO distributor about having it replaced. • The special rechargeable (secondary) battery used by your watch is not intended to be removed or replaced by you.
  • Page 51 Battery Power Levels The movement of the analog hands indicates the current battery power level. Level Hand Movement Function Status Normal. All functions enabled. • Second hand jumps Time calibration signal every 2 seconds. reception disabled. • Day changes to home position.
  • Page 52 • When battery power is at Level 2, time calibration signal reception is disabled. • When power drops to Level 3, all functions will be disabled but the watch will continue to keep time internally for about one week. If you recharge the battery sufficiently during this period, the analog hands will move automatically to the correct setting and normal timekeeping will resume.
  • Page 53 Charging Guide After a full charge, timekeeping remains enabled for up to about five months. • The following table shows the amount of time the watch needs to be exposed to light each day in order to generate enough power for normal daily operations. Exposure Level (Brightness) Approximate Exposure Time Outdoor sunlight (50,000 lux)
  • Page 54 Recovery Times The table below shows the amount exposure that is required to take the battery from one level to the next. Exposure Level Approximate Exposure Time (Brightness) Level 3 Level 2 Level 1 Outdoor sunlight (50,000 lux) 2 hours 25 hours Sunlight through a window 6 hours...

  • Page 55: Reference

    Reference This section contains more detailed and technical information about watch operation. It also contains important precautions and notes about the various features and functions of this watch. Auto Return Features • If you do not perform any operation for about two or three minutes in the current time setting mode, or in the hand/day home position correction mode, the watch will return to the Timekeeping Mode automatically.
  • Page 56 Radio-controlled Atomic Timekeeping Precautions • Strong electrostatic charge can result in the wrong time being set. • The time calibration signal bounces off the ionosphere. Because of this, such factors as changes in the reflectivity of the ionosphere, as well as movement of the ionosphere to higher altitudes due to seasonal atmospheric changes or the time of day may change the reception range of the signal and make reception temporarily impossible.
  • Page 57 Timekeeping • The year can be set in the range of 2000 to 2099. • The watch’s built-in full automatic calendar makes allowances for different month lengths and leap years. Once you set the date, there normally should be no reason to change it.
  • Page 58 Power Saving Power Saving enters a sleep state automatically whenever the watch is left for a certain period in an area where it is dark. The table below shows how watch functions are affected by Power Saving. • There actually are two sleep state levels: “second hand sleep” and “function sleep”. Elapsed Time in Dark Operation 60 to 70 minutes...
  • Page 59 To recover from the sleep state Perform any one of the following operations. • Move the watch to a well-lit area. • Press any button. E-57...

  • Page 60: Specifications

    Specifications Accuracy at normal temperature: ± 15 seconds a month (with no signal calibration) Timekeeping: Hour, minutes (hand moves every 10 seconds), seconds, day Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099 Other: Home City code (can be assigned one of 29 city codes and Coordinated Universal Time);...
  • Page 61 World Time: 29 cities (29 time zones) Other: Standard Time/Daylight Saving Time (summer time); Home City specification Other: Power Saving, auto hand home position correction Power Supply: Solar cell and one rechargeable battery Approximate battery operating time: 6 months (no exposure to light; one signal reception of approximately 4 minutes per day) E-59...

  • Page 62: Operating Precautions

    Operating Precautions Water Resistance • The following applies to watches with WATER RESIST or WATER RESISTANT marked on the back cover. Enhanced Water Resistance Under Water Daily Use Resistance Under Daily Atmospheres Atmospheres Atmospheres On watch front or Marking 5BAR 10BAR 20BAR on back cover...
  • Page 63 Battery replacement requires the use of special tools. Always request battery replacement from your original retailer or from an authorized CASIO Service Center. • Some water-resistant watches come with fashionable leather bands. Avoid swimming, washing, or any other activity that causes direct exposure of a leather band to water.
  • Page 64 Should you notice any breakage, discoloration, looseness or other problem with the band, immediately contact your original retailer or an authorized CASIO Service Center to have it checked, repaired, or replaced. Note that you will be charged for any repair or replacement of the band.
  • Page 65 Temperature • Never leave the watch on the dashboard of a car, near a heater, or in any other location that is subject to very high temperatures. Do not leave the watch where it will be exposed to very low temperatures, either. Temperature extremes can cause the watch to lose or gain time, to stop, or otherwise malfunction.
  • Page 66 Magnetism • The hands of analog and combination (analog-digital) watches are moved by a motor that uses magnetic force. When such a watch is close to a device (audio speakers, magnetic necklace, cell phone, etc.) that emits strong magnetism, the magnetism can cause timekeeping to slow down, speed up, or stop, resulting in the incorrect time being displayed.
  • Page 67 • Semi-transparent resin parts can become discolored due to sweat and dirt, and if exposed to high temperatures for long periods. • Contact an authorized CASIO Service Center to have resin components replaced. Note that you will be charged for replacement costs.
  • Page 68 Natural Leather and Imitation Leather Bands • Allowing the watch to remain in contact with other items or storing it together with other items while it is wet for long periods can cause the color of the other items to transfer to the natural leather or imitation leather band of the watch.
  • Page 69 Bacteria and Odor Resistant Band • The bacteria and odor resistant band protects against odor generated by the formation of bacteria from sweat, which ensures good comfort and hygiene. In order to ensure maximum bacteria and odor resistance, keep the band clean. Use an absorbent soft cloth to wipe the band clean of dirt, sweat, and moisture.

  • Page 70: User Maintenance

    • Should your band become badly cracked or worn, be sure to have it replaced with a new one. Request band replacement from your original retailer or an authorized CASIO Service Center. Note that you will be charged for band replacement costs, even if your watch is still covered by its warranty.
  • Page 71 Dangers of Poor Watch Care Rust • Though the stainless steel used for the watch is highly rust-resistant, rust can form if the watch is not cleaned after it becomes dirty. Failure of oxygen to come into contact with the metal because it is dirty causes breakdown of the oxidization layer on the metal surface, which leads to the formation of rust.
  • Page 72 However, charging and discharging of the battery over the years leads naturally to a loss in its ability to sustain a charge and shortens its operating time. If this happens, contact your original retailer or authorized CASIO Service Center. E-70...
  • Page 73 City Code Table...
  • Page 74 City Code Table City City City UTC Offset/ City UTC Offset/ Code Code GMT Differential GMT Differential Pago Pago –11 Jeddah Honolulu –10 Tehran +3.5 Anchorage –9 Dubai Los Angeles –8 Kabul +4.5 Denver –7 Karachi Chicago –6 Delhi +5.5 New York –5 Dhaka...
  • Page 75 • Based on data as of June 2008. • The rules governing global times (UTC offset and GMT differential) and summer time are determined by each individual country.

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