1. Introducció
This manual provides detailed instructions for the operation and maintenance of your Casio W-735H-8A2VDF Digital Wristwatch. This timepiece is designed for durability and functionality, featuring a 10-year battery, 100-meter water resistance, and a vibration alarm. Please read this manual thoroughly to ensure proper use and to maximize the lifespan of your watch.

Imatge 1.1: Davant view of the Casio W-735H-8A2VDF Digital Wristwatch. The watch features a grey resin case and strap, a black digital display with time, date, and mode indicators, and buttons labeled 'ADJUST', 'MODE', 'LIGHT', 'SPLIT', and 'START'. The bezel is marked 'VIBRATION ALARM' and 'SUPER ILLUMINATOR'.
2. Configuració
2.1 Configuració de l'hora i la data
- In Timekeeping Mode, hold down the AJUSTAR botó (a dalt a l'esquerra) fins que els segons comencin a parpellejar, cosa que indica la pantalla de configuració.
- Premeu el botó MODE button (bottom left) to cycle through the settings: Seconds → DST (Daylight Saving Time) → Hour → Minute → Year → Month → Day.
- Utilitza el COMENÇA button (top right) to increase the flashing value or the SPLIT button (bottom right) to decrease it. For seconds, pressing COMENÇA resets them to 00.
- Un cop tots els paràmetres siguin correctes, premeu el botó AJUSTAR botó per sortir de la pantalla de configuració.
2.2 Configuració de l'alarma
- Des del mode de mesura del temps, premeu la tecla MODE button until you reach the Alarm Mode (indicated by 'ALM' on the display).
- Manteniu premuda la AJUSTAR fins que els dígits de l'hora de l'alarma comencin a parpellejar.
- Utilitza el COMENÇA i SPLIT botons per ajustar l'hora i els minuts de l'alarma desitjats.
- Premeu el botó MODE button to toggle between setting the hour and minute.
- Premeu el botó AJUSTAR button to exit the alarm setting screen.
2.3 Activating Vibration Alarm and Hourly Senyal horari
- En el mode d'alarma, premeu la tecla COMENÇA button to toggle the alarm ON/OFF. An alarm indicator will appear when active.
- Premeu el botó SPLIT button to toggle the Hourly Time Signal ON/OFF. A signal indicator will appear when active.
- To activate the vibration for the alarm, press and hold the COMENÇA button in Alarm Mode until 'VIB' appears on the display. Repeat to deactivate.
3. Instruccions de funcionament
3.1 Navegació de modes
Premeu el botó MODE botó (a baix a l'esquerra) per anar canviant pels diferents modes:
- Timekeeping Mode (current time, date)
- Stopwatch Mode ('ST')
- Countdown Timer Mode ('TR')
- Alarm Mode ('ALM')

Imatge 3.1: lateral view of the Casio W-735H-8A2VDF Digital Wristwatch. This image highlights the four operational buttons on the watch's sides, labeled 'ADJUST', 'MODE', 'SPLIT', and 'START', which are used for navigating modes and setting functions.
3.2 Funció de cronòmetre
- Enter Stopwatch Mode ('ST').
- Premeu COMENÇA (top right) to begin timing.
- Premeu COMENÇA de nou per aturar el cronometratge.
- Premeu AJUSTAR (top left) to reset the stopwatch to zero.
- Per registrar temps parcials, premeu SPLIT (bottom right) while the stopwatch is running. The display will show the split time. Press SPLIT de nou per tornar al temps transcorregut.
3.3 Countdown Timer Function
- Enter Countdown Timer Mode ('TR').
- Manteniu premuda la AJUSTAR button until the timer settings begin to flash.
- Utilitza el COMENÇA i SPLIT botons per configurar el temps de compte enrere desitjat (hores, minuts, segons).
- Premeu AJUSTAR per sortir de la pantalla de configuració.
- Premeu COMENÇA to begin the countdown. Press COMENÇA de nou per pausar/reprendre.
- When the countdown reaches zero, the watch will emit an alarm or vibrate (if set). Press any button to stop the alert.
3.4 Using the Illuminator (LED Backlight)
Premeu el botó LLUM button (bottom center) to illuminate the display for easy viewing in low-light conditions. The backlight duration is preset.
4. Manteniment
4.1 Neteja del rellotge
Regularly wipe your watch with a soft, dry cloth to remove dirt and moisture. For stubborn dirt, use a soft cloth dampEsbandiu amb aigua i un detergent neutre suau i, a continuació, eixugueu. Eviteu utilitzar agents volàtils com ara dissolvent o benzina, ja que poden danyar els components de resina.
4.2 Precaucions de resistència a l'aigua
Your Casio W-735H-8A2VDF is rated for 100-meter water resistance. This means it is suitable for swimming and snorkeling. However, avoid operating the watch buttons while it is submerged in water. Do not use the watch for scuba diving or other types of diving that require air tanks.
4.3 Substitució de la bateria
The watch is equipped with an LR44 battery designed for approximately 10 years of operation. When the display becomes dim or functions become erratic, it indicates that the battery power is low. Battery replacement should be performed by a qualified technician to ensure proper water resistance and function. Do not attempt to replace the battery yourself.

Imatge 4.1: Enrere view of the Casio W-735H-8A2VDF Digital Wristwatch. The stainless steel case back is visible, engraved with 'CASIO', 'WATER RESIST 10BAR', 'STAINLESS STEEL BACK', and 'SHOCK RESIST', along with the model number.
5. Solució De Problemes
- L'hora/data és incorrecta: Re-enter the Timekeeping Mode and adjust the time and date settings as described in Section 2.1. Ensure DST (Daylight Saving Time) is set correctly for your region.
- Alarm Not Sounding/Vibrating: Check if the alarm is activated in Alarm Mode (Section 2.3). Verify that the vibration alarm is enabled if you prefer vibration over sound.
- La pantalla està en blanc o tènue: This usually indicates a low battery. Contact a qualified watch technician for battery replacement.
- Els botons no responen: If the watch is unresponsive, try pressing all four buttons simultaneously for a few seconds to perform a soft reset. If the issue persists, the battery may be completely depleted or there may be an internal malfunction requiring professional service.
6. Especificacions
| Número de model | W-735H-8A2VDF |
| Resistència a l'aigua | 100 metres (10 BAR) |
| Tipus de bateria | 1 x LR44 (approx. 10-year life) |
| Precisió | ±30 seconds per month (average) |
| Funcions | Timekeeping, Stopwatch, Countdown Timer, Multi-function Alarms (with vibration), Hourly Time Signal, LED Backlight |
| Dimensions | 3.15 x 4.8 x 3.54 polzades |
| Pes | 1.06 unces |

Imatge 6.1: The Casio W-735H-8A2VDF Digital Wristwatch displayed on a wrist, illustrating its size and fit for daily wear.
7. Garantia i Suport
For detailed information regarding the product warranty, please refer to the warranty card included with your purchase or visit the official Casio website. For customer support, service, or inquiries about replacement parts, please contact Casio customer service directly through their official channels.
Casio Oficial Weblloc: www.casio.com





