DEGAUSS
Degaussing in CRT (Cathode Ray Tube) technology refers to the process of demagnetizing the CRT's screen or aperture grille to eliminate or reduce magnetic interference and color distortion. The term "degauss" originates from the word "demagnetize."
When a CRT is in use, it can accumulate magnetic fields from nearby objects or electrical currents, which can affect the alignment of the electron beam and distort the displayed image. Degaussing is performed to restore the proper color balance and image quality.
The degaussing process involves applying a rapidly changing magnetic field to the CRT. This magnetic field effectively neutralizes any residual magnetism present in the screen or aperture grille. The degaussing coil, typically located around the front of the CRT, generates the alternating magnetic field required for degaussing.
When a CRT monitor or television is powered on, an automatic degaussing circuit is activated. This circuit generates a brief surge of current through the degaussing coil, creating the changing magnetic field necessary for degaussing. As a result, any magnetic interference is neutralized, restoring the accurate color reproduction and image clarity.
In some cases, manual degaussing may be required if the automatic degaussing circuit does not effectively eliminate the magnetic interference. Manual degaussing involves using a degaussing wand or tool placed in front of the CRT while activating the degaussing function. The wand produces a stronger magnetic field that can correct more severe magnetic distortions.
Degaussing is an important maintenance procedure for CRT displays, especially if they are moved or placed near objects that generate magnetic fields. Regular degaussing helps ensure optimal image quality and color accuracy.