Additional Information

Troubleshooting

Function

Problems

Possible causes and remedies

 

TV reception

No picture (screen is

∙ The mains lead is disconnected.

 

dark), no sound

/ Connect the mains lead.

 

 

∙ The video TV is switched off.

 

 

/ Press ;, PROGR +/– or programme number on the Remote

 

 

 

Commander, or PROGR +/– on the video TV.

 

 

Good picture but no ∙ The headphones are connected to 2 jack.

 

sound

/

Disconnect the headphones.

 

 

∙ The ¤ is displayed on the screen.

 

 

/

Press ¤.

 

 

∙ Press Á +/–.

 

 

No colour or poor

∙ Adjust “CONTRAST,” “COLOUR,” and “BRIGHTNESS” in the

 

colour(screen is

PICTURE CONTROL menu. (page 18)

 

dark) for colour

 

 

 

 

programmes, but

 

 

 

 

good sound.

 

 

 

 

No picture, no

∙ The connecting cord between the video TV and the input source is

 

sound

disconnected.

 

from video input

/

Connect it firmly.

 

source

∙ Input is not selected correctly.

 

 

/ Press until the desired input indicator appears. (page 38)

 

Clock and

The clock has

∙ The power has been interrupted, the U switch is turned off or the

timer

stopped and “--/--”

mains lead is disconnected for more than a week.

 

is displayed.

/ Re-set the clock and timer settings if necessary. (pages 15, 26)

 

Playback

Power is on, but the

∙ The safety device has been activated.

 

tape does not run.

/ Switch off, disconnect the mains lead, and leave the set for about

 

 

 

one minute.

 

 

Poor playback

∙ The COLOUR SYSTEM switch is set to incorrect position.

 

picture

/ Set COLOUR SYSTEM to the position corresponding to the colour

 

 

 

system with which the tape is recorded. (page 23)

 

 

∙ Adjust the tracking. (page 36)

 

 

∙ The video heads are dirty.

 

 

/ Clean the heads using the Sony V-25CL video head cleaning tape

 

 

 

(page 42). If the cleaning tape is not available in your area, have

 

 

 

the heads cleaned at your nearest Sony service facility. (Do not use

 

 

 

a commercially available wet-type cleaning tape, as it may

 

 

 

damage the video heads.)

 

 

∙ The tape is worn out.

 

 

/ Use a new tape.

 

 

 

 

 

The sound drops

∙ The tape is defective.

 

out.

/ Use a new tape.

 

 

 

 

 

GB

Additional Information

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Sony KV-21V4U Troubleshooting, Additional Information, Function Problems Possible causes and remedies

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.