SMART repeatedly to cycle through the four settings.
to select from the following settings and adjust:
Note
to set the hour and press 
to confirm.
to set the minutes and press 
to confirm.
to select from the following options and adjust:
21PT3429/94, 21PT8439, 21PT8439/94 specifications
The Philips 21PT8439/94 and 21PT8439, along with the 21PT3429/94, are notable entries in Philips' line of CRT televisions, showcasing the brand's commitment to quality and innovation during the era of cathode ray tube technology. Each of these models captures the essence of what made CRT televisions popular, combining functionality with user-friendly features.The Philips 21PT8439/94 is distinguished by its 21-inch screen size, making it suitable for various room sizes while providing an impressive viewing experience. It sports a traditional 4:3 aspect ratio, which was the standard for television broadcasts during its time, offering a nostalgic viewing experience for classic shows and movies. A key feature of this model is its Crystal Clear system, which aims to enhance picture sharpness and contrast, providing viewers with vibrant colors and an engaging visual experience.
Another critical technology in the Philips 21PT8439 is the integration of Digital Crystal Clear processing, designed to optimize the images displayed on screen. This technology utilizes advanced algorithms to improve detail and clarity, enabling viewers to appreciate the finer nuances in their favorite shows. Furthermore, the model comes equipped with multiple picture settings, allowing users to customize their viewing experience based on their preferences and the content being watched.
The 21PT3429/94 similarly benefits from Philips’ signature technologies, including a robust sound system that enhances the auditory experience alongside the visual. With integrated stereo speakers, this model delivers dynamic sound output, ensuring that dialogues, musical scores, and sound effects are portrayed clearly. It also features various audio settings, enabling users to adjust sound characteristics according to their environment and taste.
Additional characteristics of these models include multiple connectivity options, with AV inputs allowing users to connect external devices like VCRs and game consoles, further expanding the television's functionality. The remote control provided with the models simplifies navigation, making it convenient to switch between channels or adjust settings.
In summary, the Philips 21PT8439/94, 21PT8439, and 21PT3429/94 exemplify the hallmark features of CRT televisions, combining sophisticated technologies such as Digital Crystal Clear, enhanced sound systems, and user-friendly interfaces, ensuring a delightful viewing experience for audiences of all ages.