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Apple 5320CD Manuale Utente

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 Troubleshooting
Symptom Charts/Video - 16
 
Raster distorted 
(barrel-shaped, 
corners not square, 
stretched or 
compressed at top of 
display, or sides not 
perpendicular)
1 Refer to “First Checklist” in Troubleshooting chapter. 
2 Perform appropriate geometric adjustments. Refer to 
“Geometry” in Adjustments chapter.
3 Install monitor-adjustment cable and use on-screen video 
adjustment controls to eliminate distortion. Based on video 
tolerances, some distortion is allowed and setting need not be 
perfect. Contact Apple Technical Support if you’re unsure 
about tolerance level.
4 Replace analog/video board assembly. 
Raster not centered
1 Adjust horizontal or vertical shift control. Refer to 
Adjustments chapter.
2 Refer to “First Checklist” in Troubleshooting chapter. 
3 Install monitor-adjustment cable and use on-screen video 
adjustment controls to center raster. If centering range is 
insufficient, change the setting of switch SW701 
(three-position switch).