1. Uvod
This manual provides detailed instructions for the operation and maintenance of your Casio GA-2100-1A2ER watch. Please read this manual thoroughly to ensure proper use and to maximize the lifespan of your timepiece. The GA-2100 series combines a slim profile with the renowned G-SHOCK toughness, featuring a Carbon Core Guard structure.

Slika 1: Prednja strana view of the Casio GA-2100-1A2ER watch, showcasing its analog-digital display and octagonal bezel.
Sadržaj paketa
- Casio GA-2100-1A2ER Watch
- Korisnički priručnik (ovaj dokument)
- Warranty Card (may be separate)
2. Početno podešavanje
Before using your watch, it is recommended to set the current time and date. The GA-2100 features both analog hands and a digital display.
2.1 Funkcije dugmadi

Slika 2: Krupni plan view of the watch face, indicating the four main buttons: ADJUST (gore lijevo), LIGHT (top right), MODE (bottom left), and START (dolje desno).
- ADJUST (A): Used to enter and exit setting modes, and to confirm selections.
- LIGHT (B): Activates the LED backlight. In setting modes, it can be used to change values.
- MODE (C): Cycles through the watch's various modes (Timekeeping, Stopwatch, Timer, Alarm, World Time).
- POČETAK (D): Used to start/stop stopwatch/timer, and to change values in setting modes.
2.2 Podešavanje vremena i datuma
- U režimu mjerenja vremena, držite pritisnuto dugme ADJUST (A) button for approximately two seconds until the city code starts to flash. This indicates you are in the setting mode.
- Pritisnite MODE (C) button to cycle through the settings: City Code → DST (Daylight Saving Time) → 12/24-hour format → Seconds → Hour → Minute → Year → Month → Day.
- Koristite LIGHT (B) i POČETAK (D) dugmad za promjenu trepćuće vrijednosti. LIGHT (B) typically decreases the value, and POČETAK (D) increases it.
- Nakon što su sve postavke konfigurirane, pritisnite dugme ADJUST (A) button to exit the setting mode. The digital display will return to the Timekeeping Mode.
The analog hands will automatically adjust to match the digital time setting.
2.3 Hand Home Position Correction
If the analog hands do not match the digital time, you may need to correct their home positions.
- U režimu mjerenja vremena, držite pritisnuto dugme ADJUST (A) button for approximately five seconds until "H.SET" appears on the digital display, and the hour and minute hands move to the 12 o'clock position.
- If the hands are not at 12 o'clock, use the LIGHT (B) i POČETAK (D) buttons to adjust them.
- Pritisnite ADJUST (A) da potvrdite i izađete.
3. Načini rada
Pritisnite MODE (C) button to cycle through the watch's various functions:
- Način mjerenja vremena: Displays the current time and date.
- Stopwatch Mode (STW)Mjeri proteklo vrijeme.
- Timer Mode (TMR): Odbrojava unazad od unaprijed postavljenog vremena.
- Alarm Mode (ALM): Sets daily alarms.
- Način rada za svjetsko vrijeme (WT): Displays the current time in 48 cities (31 time zones).
3.1 Način rada štoperice
- Iz režima mjerenja vremena pritisnite MODE (C) until "STW" appears.
- Pritisnite POČETAK (D) za pokretanje štoperice.
- Pritisnite POČETAK (D) ponovo da se zaustavi.
- Pritisnite ADJUST (A) da vratite štopericu na nulu.
3.2 Režim tajmera
- Iz režima mjerenja vremena pritisnite MODE (C) until "TMR" appears.
- Držite dole ADJUST (A) until the timer setting starts to flash.
- Koristi LIGHT (B) i POČETAK (D) da biste postavili željeno vrijeme odbrojavanja.
- Pritisnite ADJUST (A) da potvrdite postavku.
- Pritisnite POČETAK (D) za početak odbrojavanja.
- Pritisnite POČETAK (D) ponovo za pauziranje/nastavak.
- Kada je pauzirano, pritisnite ADJUST (A) da resetujete tajmer.
3.3 Režim alarma
- Iz režima mjerenja vremena pritisnite MODE (C) dok se ne pojavi "ALM".
- Pritisnite MODE (C) to cycle through the alarms (AL1, AL2, AL3, AL4, AL5, SNZ, SIG).
- Držite dole ADJUST (A) on the desired alarm until the hour setting flashes.
- Koristi LIGHT (B) i POČETAK (D) to set the alarm hour and minute.
- Pritisnite ADJUST (A) to confirm the alarm setting.
- To turn an alarm ON/OFF, press POČETAK (D) while the alarm is displayed (not in setting mode).
- "SNZ" is the Snooze alarm, and "SIG" is the Hourly Signal vremena.
3.4 Režim svjetskog vremena
- Iz režima mjerenja vremena pritisnite MODE (C) until "WT" appears.
- Koristi POČETAK (D) to scroll through the different city codes/time zones.
- The digital display will show the current time for the selected city.
3.5 Illumination (Light)
Pritisnite LIGHT (B) button to illuminate the watch face for easy viewing in low-light conditions. The illumination duration can typically be adjusted in the Timekeeping Mode settings.
4. Održavanje
4.1 Otpornost na vodu
The Casio GA-2100-1A2ER watch is water-resistant to 20 BAR (200 meters). This means it is suitable for showering, swimming, and diving without scuba gear. Do not operate buttons while the watch is wet or submerged to prevent water ingress.

Slika 3: Pozadi view of the watch, displaying the "WATER RESIST 20BAR" engraving on the stainless steel case back.
4.2 Čišćenje
Wipe the watch regularly with a soft, dry cloth to remove dirt and moisture. For stubborn dirt, use a soft brush with mild soap and water, then rinse thoroughly and dry. Avoid using chemical cleaners or solvents.
4.3 Informacije o bateriji
The watch is powered by 1 Lithium Metal battery, which is included. Battery life varies depending on usage, especially frequent use of the backlight and alarms. When the display becomes dim or functions become erratic, it is an indication that the battery needs replacement. Battery replacement should be performed by a qualified technician to maintain water resistance.
5. Otkrivanje problema
- Incorrect Time/Date: Ensure the correct city code is selected for your home city. Perform the "Setting the Time and Date" procedure (Section 2.2).
- Analogne kazaljke ne odgovaraju digitalnom vremenu: Perform the "Hand Home Position Correction" procedure (Section 2.3).
- Digital Display is Dim or Hard to Read: This can be a characteristic of negative LCD displays in certain lighting conditions. Ensure the watch is viewed at an optimal angle. If the display remains unusually dim, the battery may be low.
- No Sound from Alarm/Hourly Signal: Check if the MUTE function is active. In Timekeeping Mode, press MODE (C) until "MUTE" is not displayed on the digital screen. Also, ensure the alarm or hourly signal is turned ON in Alarm Mode.
6. Specifikacije
| Broj modela | GA-2100-1A2ER |
| Proizvođač | Casio |
| Materijal | Acrylic (Crystal), Resin (Case/Band) |
| Otpornost na vodu | 20 BAR (200 metra) |
| Vrsta baterije | 1 litijum metalna baterija (uključena) |
| Dimenzije | (Refer to product packaging for exact dimensions) |
| Težina | (Refer to product packaging for exact weight) |

Slika 4: Bočni profesionalacfile of the Casio GA-2100-1A2ER watch, illustrating its slim case design.
7. Garancija i podrška
Your Casio watch is covered by a manufacturer's warranty. Please refer to the warranty card included with your purchase for specific terms and conditions, including the warranty period and coverage details. For technical support, repairs, or further assistance, please contact Casio customer service or visit the official Casio website.
Više informacija i resursa za podršku možete pronaći na službenoj stranici Casio webstranica: www.casio.com





