Adjustments Diagnostic Adjustments - 34
Adjusting the Display after Replacing the Main
Deflection Board
After replacing the main deflection board, perform the
following adjustments for these four Macintosh modes
(screen resolutions):
• 640x480 at 67 Hz
• 832x624 at 75 Hz
• 1152x870 at 75 Hz
• 1600x1200 at 85 Hz
1 Using the control strip (or the Monitors control panel),
select 1600x1200 at 85 Hz, the highest of the four
Macintosh screen resolutions.
2 Open the USB Display Service Utility (USB DSU) and
click the Adjust Geometry button.
Note:
Clicking the Adjust Geometry button causes the
DSU to automatically check high voltage (EHT). If the
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