Apple Multiple Scan 20 Display Specifications download pdf (Page 37)

Troubleshooting Symptom Charts/Geometry - 10

Geometry

Raster is too short,

tall, narrow, or wide

1 Using the On-Screen Display, click Recall.

2 Adjust the width and height of the screen. See “User

Controls” in Adjustments.

3 Double-check the user controls.

4 Replace main deflection board and CRT/video board module.

See “Main Deflection and CRT/Video Board Module” in Take

Apart chapter. See Adjustments chapter for non-user

adjustments that might be necessary after board replacement.

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Apple Multiple Scan 20 Display Specifications Page 37