Apple LC520 Spécifications Page 25

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Troubleshooting Symptom Charts/Video
(Continued)
- 7
Video
(Continued)
Raster not centered 1 Verify that adjacent computer equipment is properly
grounded. Move electrical devices away from monitor.
Temporarily shut off all fluorescent lights in area.
2 Adjust horizontal or vertical center control. Refer to
Adjustments chapter.
3 Replace analog board.
Raster distorted
(barrel-shaped,
corners not square,
stretched or
compressed at top of
display, or sides not
perpendicular)
1 Verify that adjacent computer equipment is properly
grounded. Move electrical devices away from monitor.
Temporarily shut off all fluorescent lights in area.
2 Perform appropriate geometric adjustments. Refer to
Adjustments chapter.
3 Replace analog board.
4 Replace CRT (only in rare instances).
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