Casio G-Shock GA-140-1A1 Analog-Digital Watch User Manual

Introduction

Thank you for choosing the Casio G-Shock GA-140-1A1 analog-digital watch. This timepiece is engineered for durability and functionality, featuring shock and magnetic resistance, 200-meter water resistance, and a range of advanced features. This manual provides comprehensive instructions to help you understand and utilize all the functions of your new watch.

Casio G-Shock GA-140-1A1 watch face showing analog and digital displays, with buttons labeled ADJUST, REVERSE, START-STOP, FORWARD, MODE, and SPLIT-RESET.

Figure 1: Casio G-Shock GA-140-1A1 Watch Overview. This image displays the watch's main face, highlighting the analog hands, digital displays for time, day, and date, and the various function buttons located around the bezel.

General Guide and Button Functions

Your GA-140-1A1 watch features four main buttons and one light button, each serving multiple functions depending on the current mode. Refer to Figure 1 for button locations.

A (ADJUST) Button (Top Left): Used to enter and exit setting modes. Press and hold to adjust settings.
B (REVERSE) Button (Top Right): Used to scroll backward through settings or change values. In Timekeeping Mode, press to illuminate the display.
C (MODE) Button (Bottom Left): Used to cycle through the watch's different modes (Timekeeping, World Time, Stopwatch, Timer, Alarm).
D (FORWARD / START-STOP) Button (Bottom Right): Used to scroll forward through settings or change values. In Stopwatch mode, it acts as START/STOP.
Light Button (Front, below 6 o'clock position): Activates the Amber LED backlight for illumination.

Setup: Initial Time and Date Settings

Enter Time Setting Mode: In the Timekeeping Mode, press and hold the A (ADJUST) button for about two seconds until the city code starts to flash on the digital display. This indicates the setting screen.
Select City Code (Time Zone): Use the D (FORWARD) and B (REVERSE) buttons to select your desired city code (time zone).
Configure Daylight Saving Time (DST): Press the C (MODE) button to move to the DST setting. Use D (FORWARD) to toggle between ON (DST) and OFF (Standard Time).
Set Time and Date: Press the C (MODE) button repeatedly to cycle through the settings in the following order: DST → 12/24-hour format → Seconds → Hour → Minute → Year → Month → Day → Illumination Duration → Hand Home Position Correction. Use D (FORWARD) and B (REVERSE) to adjust each value.
Hand Home Position Correction: If the analog hands do not match the digital time, navigate to the Hand Home Position Correction setting. Press D (FORWARD) to advance the minute hand by 20 seconds. Hold D (FORWARD) to move the hands at high speed. Press B (REVERSE) to reset the hands to 12 o'clock. Once aligned, press A (ADJUST) to save and exit.
Exit Setting Mode: After configuring all settings, press the A (ADJUST) button to exit the setting mode. The watch will return to Timekeeping Mode.

Operating Modes

Press the C (MODE) button to cycle through the watch's various modes:

Timekeeping Mode: Displays the current time, day, and date. This is the default mode.
World Time Mode: Allows you to view the current time in 48 cities (29 time zones) around the world. Use D (FORWARD) and B (REVERSE) to scroll through city codes.
Stopwatch Mode: Features a 1/1000-second stopwatch with speed measurement. Press D (START-STOP) to start/stop, and A (ADJUST) to reset.
Countdown Timer Mode: Set a countdown time up to 24 hours. Press D (START-STOP) to start/stop the timer.
Alarm Mode: Set up to 5 daily alarms and an hourly time signal (SIG). Use D (FORWARD) and B (REVERSE) to select alarms, and A (ADJUST) to set them.

Maintenance

Proper care will ensure the longevity and performance of your G-Shock watch.

Water Resistance (200M): Your watch is water-resistant to 200 meters. This means it is suitable for showering, swimming, and shallow diving. Do not operate buttons while the watch is submerged in water. Avoid exposing the watch to hot water or steam, as this can compromise the seals.
Cleaning: Wipe the watch case and band with a soft, dry cloth. For stubborn dirt, use a soft cloth dampened with water and a mild neutral detergent, then wipe dry. Avoid harsh chemicals or solvents.
Battery: The watch uses a Lithium Metal battery (CR1220). Battery life is approximately 2 years. When the display becomes dim or functions become unstable, it is time to replace the battery. We recommend having battery replacement performed by an authorized Casio service center to ensure water resistance is maintained.
Temperature Extremes: Avoid exposing your watch to extreme temperatures, both hot and cold, for extended periods.

Troubleshooting

Problem	Solution
Analog hands do not match digital time.	Perform Hand Home Position Correction as described in the Setup section.
Digital display is dim or blank.	The battery may be low. Replace the battery at an authorized service center.
Watch functions are unresponsive.	A strong impact or magnetic field may have affected the watch. Ensure the battery is not depleted. If issues persist, contact Casio support.
Time is incorrect.	Check your city code (time zone) and DST settings. Re-adjust the time and date if necessary.

Specifications

Model Number: GA-140-1A1
Construction: Shock Resistant, Magnetic Resistant
Water Resistance: 200 Meters (20 BAR)
Timekeeping: Analog and Digital Display
World Time: 48 cities (29 time zones), Daylight Saving Time on/off, Home city/World time city swapping
Stopwatch: 1/1000-second, Measuring capacity: 99:59'59.999'', Measuring modes: Elapsed time, lap time, split time, Others: Speed (0 to 1998 units/hour), Distance input (0.0 to 99.9)
Countdown Timer: Measuring unit: 1 second, Countdown range: 24 hours, Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments)
Alarms: 5 daily alarms (with 1 snooze alarm), Hourly time signal (SIG)
Light: Amber LED backlight (Auto light switch, selectable illumination duration, afterglow)
Calendar: Full auto-calendar (to year 2099)
Accuracy: ±15 seconds per month
Battery: CR1220 (Approx. 2 years)
Dimensions: Approximately 55 × 51.2 × 16.9 mm (H × W × D)
Weight: Approximately 72 g (4.2 ounces)

Warranty and Support

Your Casio G-Shock GA-140-1A1 watch is covered by a manufacturer's warranty. Please refer to the warranty card included with your purchase for specific terms and conditions, including coverage duration and service procedures.

For further assistance, troubleshooting, or service inquiries, please visit the official Casio support website or contact their customer service department. You can often find detailed FAQs and additional resources online.

Online Support: Visit Casio Support

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Casio GA-140-1A1