Adjustments Diagnostic Adjustments - 35
high voltage is out of range, the USB DSU will load a
nominal value.
3 Refer to the procedure called “Checking High Voltage” in
the Troubleshooting chapter to verify that the high
voltage is 27.3 kV (± 0.3 kV). If the high voltage is not
within range, adjust the high voltage using the USB DSU,
the multimeter, and the high-voltage probe. Use the high
voltage slider control on the USB DSU to make final
adjustments.
4 Using the USB DSU, select the focus pattern (percent
signs). Adjust horizontal and vertical focus controls
(two top controls on the flyback transformer) for best
center-of-screen performance. If necessary, readjust
each focus control to optimize overall focus.
5 Using the USB DSU, click the H-Focus button to improve
the dynamic focus. Drag the H-Focus slider control until
the screen shows the best overall focus balance from
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