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Press the button again to set the brightness to another level.There are three levels.

Note:This button cannot be used to adjust the display brightness when the alarm goes off and during snoozing.

3 button

1When the alarm goes off at the set wake-up time, press the 3 button to switch off the wake-up alarm light and sound.

Note:The alarm function remains active and the light ring round the alarm button continues to burn.

2When you have switched on the reading lamp and/or the radio, press the 3 button to switch off the reading lamp and/or the radio.

When you press the 3 button again, only the light goes on.

Note:When the alarm function is active, pressing the 3 button does not affect the alarm settings.

Reading lamp

1Press the @& button to switch the lamp on or off. (Fig. 19)

2Turn the light adjustment wheel @ upwards or downwards to increase or decrease the light intensity level. (Fig. 14)

,The light level indication on the display @ shows the light intensity level (00 to 20). (Fig. 21)

Tip:We advise you to set the light intensity to 20 (maximum level) for reading. If this light level is not strong enough, switch on an extra lamp.

Do not forget to set the light intensity level back to the wake-up level!

Radio (HF3462/HF3461 only)

1Press the RADIO button to switch on the radio (Fig. 22).

,The light ring round the button goes on (Fig. 23).

2Use the % and the ^ buttons to select the frequency of your favourite station. (Fig. 24)

You can choose FM stations.

3You can use the external antenna for better reception. Insert the external antenna into the antenna socket next to symbol ò on the back of the appliance.

4Press the RADIO button to switch off the radio (Fig. 22).

Power failure

To make sure the alarm goes off at the set time after a short power failure, the appliance has been provided with a backup system.This system has a self-charging battery that does not have to be replaced.The system remembers the time for a few minutes.

,After a long power failure, the display shows an incorrect clock time and the alarm time is 00.00. Set the correct clock time (see chapter ‘Preparing for use’) and the correct alarm time (see chapter ‘Using the appliance’) (Fig. 5).

Reset

1If the appliance does not respond well, remove the plug from the wall socket and then reinsert it. If this does not help, press the reset button on the bottom of the appliance to reset the display to the factory default settings (Fig. 25).

Cleaning and maintenance

Always unplug the appliance and let it cool down for approx. 15 minutes before you start cleaning it.

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Philips HF3451 manual Cleaning and maintenance
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HF3451 specifications

The Philips HF3451 is an innovative wake-up light designed to enhance the waking experience by simulating a natural sunrise. This product stands out in the market for its ability to mimic the gradual increase in daylight, helping users to wake up more gently and naturally.

One of the key features of the HF3451 is its ability to gradually increase the light intensity over a period of 20 to 40 minutes before the alarm time is set. This progressive light increase simulates the experience of a natural sunrise, easing people out of sleep and reducing the jarring effects of a traditional alarm clock.

In addition to its natural wakes-up feature, the HF3451 also offers a variety of sound options. Users can choose from different nature sounds, such as birds chirping or gentle streams, to accompany the light, providing a more serene waking environment. Furthermore, there's an FM radio feature that allows users to wake up to their favorite radio station, adding an extra layer of personalization to the waking experience.

The design of the Philips HF3451 is sleek and modern, fitting seamlessly into various bedroom aesthetics. It features a large, easy-to-read display that provides clear visibility even in low light. The adjustable brightness of the display ensures it does not disturb your sleep while maintaining a functional aspect.

Durability and energy efficiency are also important characteristics of the HF3451. The light utilizes LED technology, which is known for its long lifespan and lower energy consumption. This makes it not only environmentally friendly but also cost-effective over time.

Moreover, the HF3451 includes a snooze function that allows users to enjoy a few extra minutes of rest before the light and sound resume. Its intuitive design makes it user-friendly, with touch-sensitive buttons positioned for easy access.

Overall, the Philips HF3451 combines advanced technology with user-centric features to create a unique and beneficial waking experience. By seamlessly integrating light therapy and sound to enhance the waking process, it caters to those looking to improve their morning routine and overall well-being.
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