Philips M32 107E4 GS 3 Service Manual page 98

M32 107E4 GS_3
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: Moir is a natural effect or phenomenon of CRT that has the appearance of a wavy pattern
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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 Moir cancellation 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 moir is less visible.
- Change horizontal and vertical size to optimize the reduction of the moir effect.
MOIR
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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 moir depends on the horizontal scanning frequency and can be alleviated
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by appropriate choice of this frequency. Autoscan (MultiSync) monitors, however,
which operate over a range of scanning frequencies,
may sometimes exhibit moir in 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.
General Troubleshooting Guide
11
MOIRE
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OK
YES
END
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NO
It is need to check and
repair the monitor.
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