How to Repair a CRT Television

Many problems with CRT sets don't require professional help to repair.

The increasing popularity of LCD and Plasma television sets has led to a decrease in the production of CRT (cathode-ray rube) models. Many families still have CRT sets in their homes, however, as they are dependable and can produce images to match that of newer sets. CRT TVs can develop technical faults that should only be tackled through direct contact with your set's manufacturer or by hiring an experienced repair person. Many problems, however, can be solved by performing some basic adjustments.

Things You'll Need

• De-gaussing coil
• Coaxial cable
• Antenna
• Screwdriver
• Screws

Instructions

Magnetization Problems

1. Move any appliances away from the TV that use magnetic energy, such as stereo speakers or electrical motors. CRT televisions have internal de-magnetization devices that prevent interference from other appliances. If this feature is not working efficiently, your TV may produce distorted pictures or sound.

2. Purchase a de-gaussing coil if your set still displays distorted images even when magnetic appliances have been moved away. De-gaussing coils can be bought from most electrical stores.

3. Move the de-gaussing coil in small circular patterns about two inches from the face of the TV screen. Increase the size of the circles with each movement until you have covered the breadth of the screen. Your CRT set should now be demagnetized.

Coaxial Cables

1. Check the coaxial cable that links from your cable box to your CRT TV. Coaxial cables have a long copper wire and a metal tip that attaches to the socket labeled RF. Problems with sound and images are often caused by a loose or damaged coaxial cable.

2. Twist the metal fitting that connects to your CRT TV. Simply adjusting the position of this attachment a little can often result in improved picture reception.

3. Purchase a new cable from an electrical store if you can see any nicks or dents either on the cable or on the tip that links to your TV.

Antenna Problems

1. Alter the position of your antenna if you are watching local TV stations. Poor pictures can be caused by a badly positioned antenna.

2. Remove your old antenna by taking out the screws that bind it to your TV if changing its position doesn't help. Purchase a new antenna from an electrical store.

3. Attach the new antenna to your TV set using screws and a screwdriver. Fit the antenna tightly, but allow some flexibility as you may need to change its position at a later time.

References

• Yext TV Repair: DIY Television Repair
• RCA Television: Support