Philips V30 manual General Troubleshooting Guide, Moire

General Troubleshooting Guide		107T5	99
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11

MOIRE

: Moiris a natural effect or phenomenon of CRT that has the appearance of a wavy pattern

which is repetitive and superimposed on the screen as ripple images. , not just Philips monitor had. These are a few suggestions to help for reducing or minimizing the effect.

-Some monitors have a Moircancellation feature, activate it to the on position

or adjust the Moire cancellation function via the OSD manipulation on the monitor.

-Change resolution to the recommended standard for the specific monitor size.

-Change Window viewing pattern/scheme to a pattern where the moiris less visible.

-Change horizontal and vertical size to optimize the reduction of the moireffect.

OK

YES

END

MOIR

NO

It is need to check and repair the monitor.

A fringe pattern arising from the interference between two superimposed line patterns. In a monitor it comes from the interference between the shadow mask pattern

and the video information (video moir, and between the shadow mask and the horizontal line pattern (scan moir. It shows itself as wavy patterns on the screen and becomes more noticeable as monitor resolution increases. Since the video signals varies continuously, little can be done about video moir Scan moirdepends on the horizontal scanning frequency and can be alleviated by appropriate choice of this frequency. Autoscan (MultiSync) monitors, however, which operate over a range of scanning frequencies,

may sometimes exhibit moirin certain video modes.

Several sources can act as a catalyzer to produce Moire. They are : The CRT, shadow mask, the electron beam spot size, the resolution, video patterns, and the horizontal and vertical size.