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iv
TDS 684A, TDS 744A, & TDS 784A Service Manual
Figure 4–31: 60 Hz Rejection Test Setup Signal 4–72. . . . . . . . . . . . . . . . . .
Figure 4–32: Subsequent 60 Hz Rejection Test Hookup 4–73. . . . . . . . . . .
Figure 4–33: 60 Hz Rejection Test Result – TDS 684A Shown 4–74. . . . . .
Figure 4–34: Line Count Accuracy Test Hookup 4–75. . . . . . . . . . . . . . . . .
Figure 4–35: Line Count Accuracy Test Setup Waveform
– TDS 684A Shown 4–76. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–36: Line Count Accuracy Correct Result Waveform 4–77. . . . . .
Figure 4–37: PG502 Setup for Sync Duty Cycle Test 4–79. . . . . . . . . . . . . .
Figure 4–38: Sync Duty Cycle Test: One-Div Neg Pulse Waveform 4–80. .
Figure 4–39: Sync Duty Cycle Test: Critically Adjusted Pulse 4–81. . . . . .
Figure 5–1: Accessing the Protection Switch 5–9. . . . . . . . . . . . . . . . . . . .
Figure 5–2: Hookup for Probe Compensation 5–11. . . . . . . . . . . . . . . . . . .
Figure 5–3: Performing Probe Compensation 5–12. . . . . . . . . . . . . . . . . . .
Figure 5–4: Proper and Improper Probe Compensation 5–12. . . . . . . . . . .
Figure 5–5: Exposing the Inner Probe Tip 5–13. . . . . . . . . . . . . . . . . . . . . .
Figure 5–6: Initial Test Hookup 5–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–7: Exposing the Probe Body 5–16. . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–8: Initial Test Hookup 5–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 5–9: Locations of P6139A Probe Adjustments 5–19. . . . . . . . . . . . .
Figure 5–10: Adjustments versus Front-Corner Response 5–20. . . . . . . . .
Figure 5–11: Five and Ten Percent Luminance Patches 5–22. . . . . . . . . . .
Figure 6–1: External Modules 6–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–2: Outer-Chassis Modules 6–13. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–3: Inner-Chassis Modules 6–14. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–4: Knob Removal 6–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–5: Line Fuse and Line Cord Removal 6–18. . . . . . . . . . . . . . . . . .
Figure 6–6: Rear Cover and Cabinet Removal 6–21. . . . . . . . . . . . . . . . . .
Figure 6–7: Front Cover, Trim Ring, Menu Buttons, and
Attenuator Panel Removal (Front Cover not Shown) 6–22. . . . . . . . .
Figure 6–8: A12 Front-Panel Assembly Removal 6–24. . . . . . . . . . . . . . . . .
Figure 6–9: Disassembly of Front-Panel Assembly 6–25. . . . . . . . . . . . . . .
Figure 6–10: Cabinet Modules Removal 6–28. . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–11: A14 D1 Bus and Analog-Power and Digital-Power
Cables Removal 6–30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–12: Remove Circuit Board Assembly From Oscilloscope 6–31. .
Figure 6–13: Remove Circuit Board From Assembly 6–32. . . . . . . . . . . . .
Figure 6–14: Circuit Board Installed 6–34. . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 6–15: Circuit Board Removal 6–35. . . . . . . . . . . . . . . . . . . . . . . . . .