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5-1
Chapter 5
Troubleshooting
Title Page
5-1. Introduction .......................................................................................... 5-3
5-2. Interpreting Diagnostic Fault Codes..................................................... 5-3
5-3. Component-level Troubleshooting....................................................... 5-40
5-4. Troubleshooting the Wideband Output Assembly (A5) .................. 5-40
5-5. Troubleshooting the Wideband Oscillator Assembly (A6) ............. 5-42
5-6. Troubleshooting the Current/Hi-Res Assembly (A7)...................... 5-47
5-7. Current Section............................................................................ 5-47
5-8. Hi-Res Oscillator Section............................................................ 5-52
5-9. Troubleshooting the Switch Matrix Assembly (A8)........................ 5-54
5-10. Troubleshooting the Ohms Cal Assembly (A9)............................... 5-56
5-11. Two-wire Compensation Circuit ................................................. 5-56
5-12. Troubleshooting the Ohms Main Assembly (A10).......................... 5-57
5-13. Troubleshooting the DAC Assembly (A11) .................................... 5-58
5-14. Duty-cycle Control Circuit .......................................................... 5-63
5-15. ADC Circuit................................................................................. 5-67
5-16. Buffered Reference SIP Assembly (A11A2):.............................. 5-68
5-17. Troubleshooting the Oscillator Control Assembly (A12)................ 5-69
5-18. Troubleshooting the Oscillator Output Assembly (A13)................. 5-72
5-19. Troubleshooting the High Voltage Control Assembly (A14).......... 5-74
5-20. Magnitude Control Circuit........................................................... 5-76
5-21. Troubleshooting the High Voltage/High Current Assembly (A15). 5-77
5-22. Troubleshooting the Power Amplifier Assembly (A16).................. 5-79
5-23. Troubleshooting the Filter/PA Supply Assembly (A18) ................. 5-82