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

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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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Contents Trinitron Colour Video TV Precautions Safety InformationColour System of Your Set Contents Preparation Checking the Supplied AccessoriesInserting Batteries into the Remote Commander Getting StartedConnecting the Aerial Connecting an Outdoor AerialTo connect a UHF aerial 75-ohm coaxial cable round Tuning in to TV Stations Selecting the Language on the MenuBefore you begin Presetting Channels Automatically Presetting Channels Manually REC C02 C04 MTV C06 C12 S06 S24 L e c t Nd P r e s s OK To reactivate automatic fine- tuning AFT Setting a Pay-TV channel Setting up Video Plus+ Setting the Guide ChannelsGuide channels for Video plus+ Guide Station name ChannelSetting the Clock Watching the TV Switching the Video TV On and OffAdjusting the Volume Selecting TV ProgrammesDisplaying the On-screen Information Adjusting the PictureMuting the Sound Selecting the picture effectAdjusting the picture displayed on the screen Effect of each settingListening with Headphones Watching Line InputEffect of each control Using Fasttext Viewing TeletextAccessing the next or preceding Preventing a Teletext page from being updated or changedSuperimposing a Teletext page on the TV picture Ejecting a Video Cassette Playing a TapeInserting a Video Cassette Protecting Your Cassette against Accidental ErasurePlaying a Tape Resetting the Tape Counter Playing a Tape Repeatedly Auto RepeatDisplaying the on-Screen Indications Recording with the TV Off Recording TV ProgrammesRecording TV Programmes Watching a TV programme while recording anotherRecording TV Programmes Using the Timer Setting the TimerBefore you begin When you want to set other programmes, press to move down Using the Video TV before Timer Recording Starts To stop timer recordingDaily/weekly recording To change the setting Checking the Timer SettingsChanging or Canceling the Timer Settings To cancel the settingRecording Using the Quick-Timer If you are recordingIf you are not recording Timer Recording with PDC Signals Recording TV programmes using Video Plus+ To record the programme PressTo stop recording Switching off Automatically Sleep Timer Additional OperationsSwitching on at Your Desired Time On Timer Adjusting the Tracking Manually Adjusting the TrackingAdjusting the Tracking Automatically Enhancing Video Picture QualityAdjusting with the Optimum Picture Control OPC About the Auto Head CleanerConnecting Optional Equipment To watch the video input signalWatching the Picture Input from Optional Equipment Editing from another VCR Editing with Another VCRWatching the Pay-TV Channel Editing onto another VCRTroubleshooting Function Problems Possible causes and remediesAdditional Information Timer REC on Worn Video Heads Video Head CleaningTaking Care of Your Video TV Check the Video Heads after 1,000 Hours of UseSpecifications Television Channel Number Guide Index to Parts and Controls Video TV Set-FrontRemote Commander Additional Information Sony Corporation

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.
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