Appendix
Q & A
Black vertical lines are visible on the screen.
Thin vertical black lines on one or both sides of the screen. This minor condition is caused by grille element overlap which can occur during shipping. We suggest slapping the cabinet sides with an open hand after the monitor is warm.
If this fails, position an open white window over the affected area of the screen and maximize the brightness and contrast controls. This will cause localized heating of the overlap which will clear permanently in a few minutes. Be sure to readjust the brightness and contrast controls back to the normal viewing levels after this procedure.
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English
Two fine horizontal lines are visible on the screen.
The 2 very faint thin lines across the screen are normal. They are caused by the aperture grille stabilization filaments which are required for all aperture grille CRTs’.
Moiré is a type of natural interference which produces soft or wavy lines on your screen. It may appear due to interference between the regulated pattern of the picture from the input signal and the phosphor pitch pattern of the CRT. Refer to page 17 ”Clear Moiré“ for more detail.
Example of moiré:
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