Taking Care of Your Video TV

Video Head Cleaning

When playback pictures are noisy and hardly visible, or when no picture appears, the video heads may be contaminated. In such a case, clean the video heads using the V-25CL video head cleaning tape (not supplied), or ask Sony service personnel to clean the video heads, with this service there would be a standard charge.

Symptoms caused by contaminated video heads

Normal picture

Rough picture

Unclear picture

No picture (or

 

 

 

black & white

 

 

 

screen appears)

 

 

 

 

 

 

 

 

GB

initial terminal

Worn Video Heads

If your video TV displays a poor picture after you clean the video heads, you may need to replace them. Consult your dealer or the Sony Service Center nearest you.

Note

Do not use a commercially available wet-type cleaning tape, as it may damage the video heads.

Check the Video Heads after 1,000 Hours of Use

A video TV is a high precision machine. It must record on or play from magnetic tapes on which the image signals from the colour TV or the video camcorder are recorded.

The video heads or mechanical parts for transporting the tape are contaminated or worn after extended use. You should have your video TV checked after each 1,000 hours of use.

About Moisture Condensation

If the unit is brought directly from a cold place to a warm place, moisture may condense on the video head drum. If this happens, the tape may stick to the head drum and it may be damaged or the unit may not operate correctly. To avoid possible damage caused by moisture condensation, be sure not to leave a cassette inside the compartment when the unit is not in use. When bringing the unit from a cold place to a warm place, wait for about 10 minutes before operating it.

If the tape operation buttons do not work due to moisture condensation, leave the unit for more than one hour with the power on.

Additional Information

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Sony KV-21V4U Taking Care of Your Video TV, Video Head Cleaning, Worn Video Heads, About Moisture Condensation

KV-21V4U specifications

The Sony KV-21V4U is a classic CRT (cathode-ray tube) television that embodies the technological innovations of its time, becoming a favorite among users for both its image quality and versatile features. This model, part of Sony's KV series, was particularly known for its robust build and reliable performance, making it a staple in many households during its era.

One of the key features of the KV-21V4U is its 21-inch screen, which is sized to fit comfortably in various living environments while still providing a satisfying viewing experience. The image quality is notable, showcasing Sony's Trinitron technology. This technology is well-regarded for offering superior color accuracy and brightness compared to traditional CRTs, thanks to its unique aperture grille design. This innovative structure maximizes the efficiency of light transmission and enhances the overall clarity of the image.

In terms of sound, the KV-21V4U included an integrated stereo speaker system, delivering crisp and clear audio. The television also featured various audio and visual enhancements, such as electronic volume control and a balance adjustment feature, allowing users to customize their listening experience according to their preferences.

The KV-21V4U was equipped with multiple input options, providing users with flexibility for connectivity. The model typically included various AV inputs such as composite and RF inputs, making it a suitable choice for connecting a variety of devices, including video game consoles, DVD players, and cable boxes. This versatility ensured that users could enjoy a range of entertainment options with ease.

Moreover, the television boasted an ergonomic remote control, simplifying the navigation of channels and settings. Picture quality adjustments, including contrast and brightness settings, allowed users to fine-tune their viewing experience.

The KV-21V4U also showcased a sleek design typical of Sony products at that time, which blended smoothly into home decor while maintaining a compact footprint.

Though the KV-21V4U has since been eclipsed by the rise of flat-screen technology, it remains a beloved piece of nostalgia for many, representing a pivotal time in television engineering. Its combination of performance, ease of use, and faithful image reproduction left a lasting mark on consumers' appreciation for quality home entertainment.