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MA2503-A
© 2025 CASIO COMPUTER CO., LTD.
User's Guide
Watch
5745 EN
Published: 3/2025

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Summary of Contents for Casio 5745 EN Series

  • Page 1 MA2503-A © 2025 CASIO COMPUTER CO., LTD. User’s Guide Watch 5745 EN Published: 3/2025...
  • Page 2 Congratulations upon your selection of this CASIO watch. To ensure that this watch provides you with the years of service for which it is designed, carefully read and follow the instructions in this manual, especially the information under “Operating Precautions” and “User Maintenance”.
  • Page 3: Getting Acquainted

    Getting Acquainted Keep the watch exposed to bright light The electricity generated by the solar panel of the watch Bright Light is stored by a built-in battery. Leaving or using the watch where it is not exposed to light causes the battery to run Solar panel 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 being disabled. If the battery goes dead, you will have to re-configure watch settings after recharging.
  • Page 5 • The actual level at which some functions are disabled depends on the watch model. • Be sure to read “Power Supply” (page EN-39) for important information you need to know when exposing the watch to bright light. If the display of the watch is blank... If the display of the watch is blank, it means that the watch’s Power Saving function has turned off the display to conserve power.
  • Page 6: About This Manual

    About This Manual • Button operations are indicated using the letters shown in the illustration. • Each section of this manual provides you with the information you need to perform operations in each mode. Further details and technical information can be found in the “Reference”...
  • Page 7 Contents Getting Acquainted ....................EN-1 Watch Features ..................... EN-9 General Guide ..................... EN-10 Timekeeping ....................... EN-12 World Time ......................EN-20 Alarm ........................EN-23 Timer ........................EN-28 Stopwatch ......................EN-34 Illumination ......................EN-37 Power Supply ...................... EN-39 Adjusting Home Positions ................. EN-48 EN-5...
  • Page 8 Reference ......................EN-50 Specifications ..................... EN-56 Operating Precautions ..................EN-59 User Maintenance ....................EN-70 EN-6...
  • Page 9: Table Of Contents

    Procedure Lookup The following is a handy reference list of all the operational procedures contained in this manual. To set the current digital time and date ............EN-14 To change the Daylight Saving Time (summer time) setting ......EN-18 To view the time in another city ................ EN-21 To toggle a city code time between Standard Time and Daylight Saving Time ..................
  • Page 10 To use the countdown timer ................EN-32 To measure times with the stopwatch ............. EN-35 To illuminate the display ..................EN-37 To specify the illumination duration ..............EN-38 To check the current battery level ..............EN-41 To adjust home positions .................. EN-48 To turn the button operation tone on and off ..........
  • Page 11: Watch Features

    Watch Features Solar powered operation ◆ World Time ◆ Alarm ◆ Timer ◆ Stopwatch ◆ EN-9...
  • Page 12: General Guide

    General Guide • Press C to change from mode to mode. • In any mode (except when a setting screen is on the display), press B to illuminate the face of the watch. Timekeeping Mode Battery Level Indicator World Time Mode EN-10...
  • Page 13 Stopwatch Mode Timer Mode Alarm Mode EN-11...
  • Page 14 Timekeeping Use the Timekeeping Mode to set and view the current time and date. • When setting the time, you can also configure settings for the 12/24-hour format. • Each press of D cycles the digital display in the sequence shown below. Month PM indicator Hour : Minute...
  • Page 15 • All of the operations in this section are performed in the Timekeeping Mode, which you can enter by pressing C (page EN-10). Setting the Digital Time and Date Make sure you select your Home City code before you change the current time and date settings.
  • Page 16: To Set The Current Digital Time And Date

    To set the current digital time and date 1. In the Timekeeping Mode, hold down A for about two City code seconds, until “ADJ” appears on the display. • Your current Home City code will be flashing on the screen. 2.
  • Page 17 3. While the setting you want to change is flashing, use D and B to change it as explained below. Screen: To do this: Do this: Change the city code Press D (east) and B (west). Toggle between Daylight Saving Time Press D.
  • Page 18 Screen: To do this: Do this: Toggle the button operation tone between Press D. (on) and (off) Toggle the illumination duration between LT1 (approximately 1.5 seconds) and Press D. LT3 (approximately 3 seconds). Change the day of the week language ENG: English POR: Portuguese Use D (+) and B (–).
  • Page 19: Daylight Saving Time (Dst)

    12-hour and 24-hour timekeeping • With the 12-hour format, the P (PM) indicator appears to the left of the hour digits for times in the range of noon to 11:59 p.m. and no indicator appears for times in the range of midnight to 11:59 a.m. •...
  • Page 20: To Change The Daylight Saving Time (Summer Time) Setting

    To change the Daylight Saving Time (summer time) setting 1. In the Timekeeping Mode, hold down A for about two seconds, until “ADJ” appears on the display. • Your current Home City code will be flashing on the screen. 2. Press C once to display the DST setting screen. 3.
  • Page 21 Analog Timekeeping The analog time of this watch is synchronized with the digital time. The analog time setting is adjusted automatically whenever you change the digital time. Note • The hands for the analog timepiece move to adjust to a new setting whenever any of the following occurs.
  • Page 22: World Time

    World Time The World Time Mode digitally displays the current time in City code 48 cities (31 time zones) around the world. • If the current time shown for a city is wrong, check your Home City time settings and make the necessary changes (page EN-13).
  • Page 23: To View The Time In Another City

    To view the time in another city If you press D while in the World Time Mode, your currently selected World Time City code will appear on the digital display for about two seconds. After that, the current time in that city will appear. Pressing D again while the World Time City code is displayed will scroll to the next city code.
  • Page 24: To Swap Your Home City And World Time City

    • Note that the DST/Standard Time setting affects only the currently displayed city code. Other city codes are not affected. Swapping your Home City and World Time City You can use the procedure below to swap your Home City and World Time City. This changes your Home City to your World Time City, and your World Time City to your Home City.
  • Page 25 Alarm The Alarm Mode lets you configure five daily alarms. You also can use it to turn the Hourly Time Signal on or off. • The watch beeps for about 10 seconds when an alarm time is reached. • Turning on the Hourly Time Signal causes the watch to beep on the hour every hour.
  • Page 26: To Set An Alarm Time

    To set an alarm time Alarm number Alarm time About two seconds 1. In the Alarm Mode, use D to scroll through the alarm screens until the one whose time you want to set is displayed. • The alarm screens are AL1, AL2, AL3, AL4, and AL5. EN-24...
  • Page 27: Alarm Operation

    2. After you select an alarm, hold down A for about two seconds until the hour setting of the alarm time starts to flash. This is the setting mode. • This operation turns on the alarm automatically. 3. Press C to move the flashing between the hour and minute settings. 4.
  • Page 28: To Turn An Alarm On And Off

    To turn an alarm on and off 1. In the Alarm Mode, use D to select an alarm. Alarm on indicator 2. Press A to toggle it on and off. EN-26...
  • Page 29: To Turn The Hourly Time Signal On And Off

    To turn the Hourly Time Signal on and off 1. In the Alarm Mode, use D to select the Hourly Time Hourly time signal Signal (SIG) (page EN-24). on indicator 2. Press A to toggle it on and off. EN-27...
  • Page 30 Timer Timer 1 Timer 2 Two seconds Seconds Seconds Minutes Minutes Dual timers can be set with two different starting times. The watch can be configured so the two timers alternate, so when one reaches the end of its countdown, the other timer starts.
  • Page 31 The watch emits a short beep whenever either of the timers reaches the end of its countdown during an ongoing timer operation. The watch emits a 5-second beep when the end of the final timer operation (specified by the number of repeats) is reached.
  • Page 32: To Configure The Countdown Timer

    Countdown End Beeper The countdown end beeper lets you know when the countdown reaches zero. The beeper stops after about five seconds or when you press any button. To configure the countdown timer 1. While the countdown start time is on the display in the Timer Mode, hold down A until the current countdown start time starts to flash, which indicates the setting screen.
  • Page 33 2. Press C to move the flashing in the sequence shown below to select other settings. Timer 1 Timer 1 Timer 2 Timer 2 Minutes Seconds Minutes Seconds Number of Repeats 3. When the setting you want to change is flashing, use D and B to change it as described below.
  • Page 34: To Use The Countdown Timer

    4. Press A to exit the setting screen. To use the countdown timer Timer (1 or 2) Current repeat count (Reset) Two seconds (Start/Stop) Preset number of repeats Current timer time Press D while in the Timer Mode to start the countdown timer. •...
  • Page 35 • The countdown is performed by alternating between Timer 1 and Timer 2. A short beep is emitted to signal a changeover from one timer to the other. • Pressing A while a countdown timer is stopped resets that time to the start time specified by you.
  • Page 36 Stopwatch The stopwatch lets you measure elapsed time, split times, and two finishes. • The display range of the stopwatch is 59 minutes, 59.99 seconds. • The stopwatch continues to run until you stop it. If it reaches its limit, it restarts from zero. •...
  • Page 37: To Measure Times With The Stopwatch

    To measure times with the stopwatch Elapsed time Start Stop Re-start Stop Clear Split Time Start Split Split release Stop Clear • The split time screen alternates between a split indicator (SPL) and the split time at two-second intervals. EN-35...
  • Page 38 Two Finishes Start Split Stop Split release Clear First runner Second runner Display time of finishes. finishes. second runner. Display time of first runner. EN-36...
  • Page 39: To Illuminate The Display

    Illumination An LED (light-emitting diode) illuminate the display for easy reading in the dark. To illuminate the display In any mode (except when a setting screen is on the display), press B to turn on illumination. • You can use the procedure below to select either 1.5 seconds or 3 seconds as the illumination duration.
  • Page 40: To Specify The Illumination Duration

    To specify the illumination duration 1. In the Timekeeping Mode, hold down A until the display contents start to flash. This is the setting screen. 2. Press C 10 times until the current illumination duration setting (LT1 or LT3) appears. 3.
  • Page 41: Power Supply

    Power Supply This watch is equipped with a solar panel and a rechargeable battery that is charged by the electrical power produced by the solar panel. The illustration shown below shows how you should position the watch for charging. Example: Orient the watch so its face Solar panel is pointing at a light source.
  • Page 42 If you experience problems getting the rechargeable battery to charge fully, contact your dealer or CASIO distributor about having it replaced. • Never try to remove or replace the watch’s rechargeable battery yourself. Use of the wrong type of battery can damage the watch.
  • Page 43: To Check The Current Battery Level

    To check the current battery level When the battery level is at Level 1 (HI) or Level 2 (MID), the corresponding battery level indicator (HI or MID, page EN-10) will appear only if you press C in the Timekeeping Mode. For other battery levels, the applicable indicator appears automatically.
  • Page 44 • The battery level indicator shows the current power level of the rechargeable battery. Level Battery Level Indicator Function Status All functions enabled. All functions enabled. Key operation tone, alarm, Hourly Time Signal, and illumination disabled. (Charge Soon Alert) All hands stop at 12 o’clock. All operations disabled.
  • Page 45 • The indicator at Level 3 tells you that battery power is very low, and that exposure to bright light for charging is required as soon as possible. • At Level 5, all functions are disabled and settings return to their initial factory defaults.
  • Page 46: Charging Precautions

    • Performing illumination, or beeper operations during a Recover indicator short period may cause (recover) to appear on the display. After some time, battery power will recover and (recover) will disappear, indicating that the above functions are enabled again. • If (recover) appears frequently, it probably means that remaining battery power is low.
  • Page 47 Warning! Some light sources and environments can cause the watch to become extremely hot during charging, which creates the risk of burn injury and damage to internal watch components. Avoid charging the watch under conditions like the ones described below, where the temperatures may exceed 60°C (140°F).
  • Page 48: Charging Guide

    Charging Guide 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. Approximate Exposure Level (Brightness) Exposure Time Outdoor Sunlight (50,000 lux) 8 minutes Sunlight Through a Window (10,000 lux) 30 minutes...
  • Page 49: Recovery Times

    Recovery Times The table below shows the amount exposure that is required to take the battery from one level to the next. Approximate Exposure Time Exposure Level Level 5 Level 4 Level 3 Level 2 Level 1 (Brightness) Outdoor Sunlight 3 hours 35 hours 10 hours...
  • Page 50: To Adjust Home Positions

    Adjusting Home Positions Strong magnetism or impact can cause the hands of the watch to be off. If this happens, perform the applicable home position adjustment procedures in this section. • Hand home position adjustment is not required if the analog time and digital time are the same in the Timekeeping Mode.
  • Page 51 • The hour and minute hands should move to 12 o’clock (their home position), and “0:00” will flash on the display. • If the hour and minute hands are not at 12 o’clock, use D (+) and B (–) to move them there. •...
  • Page 52: 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. Button Operation Tone The button operation tone sounds any time you press one of the watch’s buttons. You can turn the button operation tone on or off as desired.
  • Page 53: To Turn The Button Operation Tone On And Off

    To turn the button operation tone on and off 1. In the Timekeeping Mode, hold down A for about two seconds, until “ADJ” appears on the display. • Your current Home City code will be flashing on the screen. 2. Press C nine times until the current button operation tone setting ( ) appears.
  • Page 54: Power Saving Function

    Power Saving Function The Power Saving function enters a sleep state automatically whenever the watch is left in an area for a certain period where it is dark (except if the watch is in the Stopwatch or Timer mode). The table below shows how watch functions are affected by the Power Saving function.
  • Page 55: To Recover From The Sleep State

    Elapsed Time in Dark Display Operation 60 to 70 minutes All functions enabled, except for the display • Beeper tone, illumination, and display Blank 6 or 7 days disabled • Analog timekeeping stopped at 12 o’clock • Wearing the watch inside the sleeve of clothing can cause it to enter the sleep state.
  • Page 56: Initial Screens

    Auto Return Features • If you leave the watch in the Alarm Mode, or with the battery level indicator displayed for two or three minutes without performing any operation, it automatically returns to the Timekeeping Mode. • If you leave the watch with a flashing setting on the display for two or three minutes without performing any operation, the watch automatically exits the setting screen.
  • Page 57 Timekeeping • Resetting the seconds to 00 while the current count is in the range of 30 to 59 causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are reset to 00 without changing the minutes. •...
  • Page 58: Specifications

    Specifications Accuracy at normal temperature: ± 30 seconds a month Digital Timekeeping: Hour, minutes, seconds, p.m. (P), month, day, day of the week Time system: Switchable between 12-hour and 24-hour formats Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099 Other: Home city code (can be assigned one of 48 city codes);...
  • Page 59 Timer: Number of timers: 2 (one set) Setting unit: 5 seconds Range: 99 minutes 55 seconds each timer Countdown unit: 1 second Number of repeats: 1 to 10 Other: 5-second time up beeper Stopwatch: Measuring unit: 1/100 second Measuring capacity: 59'59.99" Measuring modes: Elapsed time, split time, two finishes Illumination: LED (light-emitting diode);...
  • Page 60 Power Supply : Solar panel and one rechargeable battery (Type: CTL920) Battery nominal voltage: 2.3V Approximate Battery Operating Time 10 months (from full charge to Level 4 when the watch is not exposed to light) under the following conditions: • Display on 18 hours per day, sleep state 6 hours per day •...
  • Page 61: Operating Precautions

    Operating Precautions Water Resistance • The information below applies to watches with WATER RESIST or WATER RESISTANT marked on the back cover. Enhanced Water Resistance Under Water Daily Use Resistance Under Daily 20  Atmospheres Atmospheres Atmospheres On watch front or on Marking 5BAR 10BAR...
  • Page 62 • Watches that do not have WATER RESIST or WATER RESISTANT marked on the back cover are not protected against the effects of sweat. Avoid using such a watch under conditions where it will be exposed to large amounts of sweat or moisture, or to direct splashing with water.
  • Page 63 If glass fogging does not clear up or if you notice moisture inside of the glass, immediately stop using your watch and take it to your original retailer or to an authorized CASIO service center.
  • Page 64 Take your watch to your original retailer or to a CASIO service center for inspection and repair (for which you will be charged) or to have the band replaced (for which you will be charged).
  • Page 65 Temperature • Never leave your 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 your watch where it will be exposed to very low temperatures. Temperature extremes can cause your 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 Chemicals • Do not allow your watch to come into contact with thinner, gasoline, solvents, oils, or fats, or with any cleaners, adhesives, paints, medicines, or cosmetics that contain such ingredients. Doing so can cause discoloration of or damage to the resin case, resin band, leather, and other parts.
  • Page 68 • Leaving your watch where it is exposed to direct sunlight (ultraviolet rays) for long periods or failure to clean dirt from your watch for long periods can cause it to become discolored. • Friction caused by certain conditions (strong external force, sustained rubbing, impact, etc.) can cause discoloration of painted components.
  • Page 69: Metal Components

    Leather Band • Allowing your watch to remain in contact with other items or storing it together with other items for long periods while it is wet can cause the color of the leather band to transfer to the other items or the color of the other items to transfer to the leather band.
  • Page 70: Liquid Crystal Display

    • Use a soft toothbrush or similar tool to scrub the metal with a weak solution of water and a mild neutral detergent, or with soapy water. Next, rinse with water to remove all remaining detergent and then wipe dry with a soft absorbent cloth. When washing metal components, wrap the watch case with kitchen plastic wrap so it does not come into contact with the detergent or soap.
  • Page 71 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 your watch or its malfunction. EN-69...
  • Page 72: User Maintenance

    User Maintenance Caring for Your Watch Remember that you wear your watch next to your skin, just like a piece of clothing. To ensure your watch performs at the level for which it is designed, keep it clean by frequently wiping with a soft cloth to keep your watch and band free of dirt, sweat, water and other foreign matter.
  • Page 73 • For a resin band, wash with water and then wipe dry with a soft cloth. Note that sometimes a smudge like pattern may appear on the surface of a resin band. This will not have any effect on your skin or clothing. Wipe with a cloth to remove the smudge pattern.
  • Page 74 • Rust can cause sharp areas on metal components and can cause band pins to fly out of position or to fall out. If you ever notice any abnormality immediately stop using your watch and take it to your original retailer or to an authorized CASIO service center.
  • Page 75 Note, however, that long use or operating conditions can cause the capacity or charging efficiency of the rechargeable battery to deteriorate. If you feel that the amount of operation provided by charging is too short, contact your original retailer or CASIO service center. EN-73...
  • Page 76: City Code Table

    City Code Table...
  • Page 77 City Code Table City UTC offset/ City UTC offset/ City City Code GMT Differential Code GMT Differential Pago Pago –11 Praia –1 Honolulu –10 Anchorage –9 Lisbon Vancouver London –8 Los Angeles Madrid Edmonton Paris –7 Denver Rome Berlin Mexico City –6 Chicago Stockholm...
  • Page 78 City UTC offset/ City UTC offset/ City City Code GMT Differential Code GMT Differential Dubai Guam Kabul +4.5 Sydney Karachi Noumea Delhi +5.5 Wellington Kathmandu +5.75 • Based on data as of July 2024. Dhaka • The rules governing global times Yangon +6.5 (UTC offset and GMT differential) and...
  • Page 79 CASIO COMPUTER CO., LTD. 6-2, Hon-machi 1-chome Shibuya-ku, Tokyo 151-8543, Japan...