Adjustment Procedures
TDS 420A, TDS 430A & TDS 460A Service Manual
5-25
b. Make the focus adjustment:
H Locate R411 (FOCUS) (see Figure 5--11).
H Adjust R411 for best overall focusing at all four corners and at the
center of the screen (see F igure 5 --13).
CenterCorner
Corner
Corner
Corner
Figure 5- 13: Composite Pattern for Focusing
6. Restore the oscilloscope to normal operation:
a. Restore the dip switch to the settings that follow:
Switch No. 1 2 3 4 5 6 7 8
Open
Closed X X X X X X X X
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