Sony Trinitron CPD-120AS Mode D'emploi page 32

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Fine horizontal lines (wires) are visible
m These wires stabilize the vertically striped Aperture Grille. The
Aperture Grille allows more light to pass through to the screen giving
the Trinitron CRT more color and brightness.
Wavy or elliptical (moire) pattern is visible
m Due to the relationship between resolution, display Aperture Grille
pitch and the pitch of some image patterns, certain screen
backgrounds, especially gray, sometimes show moire which looks like
wavy lines. This can only be eliminated by changing your desktop
pattern.
Hum is heard right after the power is turned on
m When the power is turned on, the Auto-degauss cycle* is activated.
While the Auto-degauss cycle is activated, a hum may be heard for
about 3 seconds. This is not a malfunction.
* The Auto-degauss function demagnetizes the metal frame of the CRT to obtain
a neutral field for uniform color reproduction. If a second degauss cycle is
needed, allow a minimum interval of 20 minutes for the best result.
• If the problem persists, call your authorized Sony dealer from a
location near you, or call Sony Technical Support.
• Note the model name and the serial number of your display. Also note
the make and name of your computer and video board.
Troubleshooting
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Trinitron cpd-220as

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