CASIO G-SHOCK GA-400 Instruction Manual
International Warranty
This document outlines the international warranty for CASIO G-SHOCK watches. It details the network of CASIO service centers worldwide. For warranty service, the watch should be sent to a CASIO service center within the international warranty network. Details regarding warranty coverage and service procedures are provided.
Distributor Information
A comprehensive list of authorized CASIO G-SHOCK distributors and service centers is provided for various countries worldwide. This ensures users can access support and service for their watches globally. The list includes country names and contact information for local representatives.
About CASIO G-SHOCK
The CASIO G-SHOCK brand is known for its toughness and durability. The "G-SHOCK" name signifies a watch designed to withstand extreme conditions. This manual pertains to the GA-400 model, module 5398.
Water Resistance
The water resistance of your G-SHOCK watch is indicated by its rating, which is based on ISO 2281 standards. The ratings explained are:
- 50 M (5 Bar): Suitable for everyday use, splashes, and rain. Not suitable for swimming or diving.
- 100 M (10 Bar): Suitable for swimming and snorkeling. Not suitable for diving.
- 200 M (20 Bar): Suitable for recreational diving. Not suitable for saturation diving.
- 300 M (30 Bar): Suitable for deep-sea diving.
Note: Water resistance is not permanent and may be affected by aging or damage to the watch case or crown. Avoid operating the buttons underwater.
Operating Instructions
1. Setting the Home City
This procedure sets the current city for timekeeping and world time functions. The Home City code determines the standard time and daylight saving time settings. Common city codes include TYO (Tokyo), NYC (New York), LON (London), and UTC.
Steps:
- Press the Hold button to enter the setting mode.
- Select the desired Home City code using the buttons.
- Confirm the selection.
2. Daylight Saving Time (DST) Setting
The DST function allows you to adjust the time by one hour for daylight saving. It can be set to ON, OFF, or AUTO.
Steps:
- Navigate to the timekeeping mode.
- Press the Hold button to enter DST setting.
- Use the buttons to cycle through ON, OFF, or AUTO.
- Confirm the setting.
3. Timekeeping Mode
This is the primary mode for displaying the current time, date, and day of the week. The display can typically show time in 12-hour or 24-hour format.
Features:
- Displays Hour, Minute, Second, Year, Month, and Day.
- Automatic calendar adjusts for leap years.
- DST can be enabled or disabled.
4. Calendar Mode
In this mode, you can view the current date and day of the week. The automatic calendar ensures accuracy.
5. Alarm Mode
The watch features multiple alarms (AL1, AL2, AL3, AL4) and a hourly time signal (SIG). Each alarm can be set to a specific time and day of the week.
Setting an Alarm:
- Enter Alarm Mode.
- Select the alarm to set (AL1-AL4).
- Press and hold the Hold button to set the alarm time (Hour and Minute).
- Confirm the alarm time.
- Activate/Deactivate alarms and the hourly signal using the appropriate buttons. A "dot" indicator usually shows when an alarm is active.
6. Stopwatch Mode (STW)
The stopwatch measures elapsed time, split times, and first/second place times. It typically measures up to 23 hours, 59 minutes, and 59.99 seconds.
Operations:
- Start/Stop: Press the top-right button.
- Split/Reset: Press the bottom-right button.
- Reset: Press the bottom-right button after stopping.
- Lap/Split Reset: Press the bottom-right button to record a split, then press again to reset.
The stopwatch can measure in 1/100-second increments.
7. Timer Mode (TMR)
The countdown timer can be set for a specific duration, counting down from that time to zero. It can be used for activities like interval training or cooking.
Operations:
- Set Timer Duration: Enter Timer Mode, then use buttons to set hours and minutes.
- Start/Stop: Press the top-right button.
- Reset: Press the bottom-right button to reset to the set duration.
8. World Time Mode
This mode displays the current time in 48 different cities (29 time zones) around the world. You can also set DST for these cities.
Operations:
- Enter World Time Mode.
- Use the buttons to scroll through the city codes.
- The display shows the city code and the current time in that zone.
- DST can be toggled ON/OFF for the selected city.
Sample World Time Cities and UTC Offsets:
| City Code | UTC Offset |
|---|---|
| TYO | +09:00 |
| NYC | -05:00 |
| LON | +00:00 |
| PAR | +01:00 |
| BKK | +07:00 |
| HKG | +08:00 |
| SYD | +10:00 |
| ADL | +09:30 |
| SEL | +09:00 |
| TPE | +08:00 |
| MOW* | +03:00 |
| JED | +03:00 |
| KBL | +04:30 |
| KHI | +05:00 |
| DEL | +05:30 |
| GUM | +10:00 |
| NOU | +11:00 |
| WLG | +12:00 |
*Note: MOW indicates Moscow time, which may observe DST.
9. Button Functions and Indicators
The watch uses several buttons for operation:
- Hold Button: Used to enter setting modes and confirm selections.
- Mode Button: Cycles through different modes (Timekeeping, Alarm, Stopwatch, Timer, World Time).
- Adjust/Select Buttons (e.g., top-right, bottom-right): Used to change values, scroll through options, start/stop functions, and record splits.
- Light Button: Activates the backlight for viewing in low light.
- MUTE Function: Silences alarm and button beep sounds.
- SIG Indicator: Appears when the hourly time signal is active.
- DST Indicator: Appears when Daylight Saving Time is active.
- AL1-AL4 Indicators: Appear when respective alarms are active.
- SNZ Indicator: Appears when the snooze function is active.
- SIG Indicator: Appears when the hourly time signal is active.
- LED Indicator: Shows when the backlight is active.
10. Battery Replacement
The watch is powered by a battery. When the battery is low, a battery indicator may appear, or functions may become erratic. Battery replacement should be performed by qualified personnel.
Details:
- Battery Type: Typically SR927W (or equivalent).
- Battery Life: Approximately 2-3 years under normal use.
- Replacement: Requires opening the watch case, which should be done carefully to maintain water resistance.
11. Maintenance and Care
To ensure the longevity and accuracy of your watch:
- Keep the watch clean by wiping it with a soft, dry cloth.
- Avoid exposing the watch to extreme temperatures, strong magnetic fields, or corrosive substances.
- Ensure the crown is pushed in or screwed down to maintain water resistance.
- Have the battery replaced periodically by a qualified technician.
12. Troubleshooting
Issue: Watch is not functioning correctly or display is blank.Solution: Check battery level. If low, replace the battery. Ensure buttons are not stuck. Reset the module if necessary.
Issue: Time is inaccurate.Solution: Ensure the correct Home City is set. Check DST settings. If the watch continues to lose or gain time, it may require servicing.
Issue: Alarms or signals are not sounding.Solution: Verify that the alarms or hourly signal are enabled and set correctly. Check if the MUTE function is active.
Technical Specifications
Module: 5398
Case: Resin/Stainless Steel
Band: Resin/Stainless Steel
Water Resistance: Varies by model (e.g., 50M, 100M, 200M)
Battery: SR927W (or equivalent)
Approximate Battery Life: 2-3 years
Accuracy: ±15 seconds per month
Operating Temperature: -10°C to +60°C (14°F to 140°F)
Dimensions: Varies by model
Weight: Varies by model
Contact Information
For service and support, please refer to the international distributor list provided in this manual or visit the official CASIO website.
CASIO COMPUTER CO., LTD.
1-6-2, Hon-machi 1-chome, Shibuya-ku, Tokyo 151-8543, Japan
