20 E8257D/67D, E8663D PSG Signal Generators Service Guide
Troubleshooting
Getting Started with Troubleshooting
Getting Started with Troubleshooting
Referring to Table 1-1:
— determine where to begin troubleshooting
— work on problems in the order they are presented in the table
— use the descriptions provided in this chapter that explain how the signal
generator operates, and the function of each assembly: the overall
description (page 1-134), the synthesis loop (page 1-147), the RF path
(page 1-155), and self–test (page 1-181).
Table 1-1
If able to run self–test... Go to this section...
Run Self–Test “Running Self–Test” on page 21 and refer to
“Self–Test Failures and Related Troubleshooting” on page 25.
If unable to run self–test, check... Go to this section...
Power supply failures
A18 CPU turn–on failures
Front panel display or keyboard operations
“Power Supply Troubleshooting” on page 37
“A18 CPU Turn–On Test” on page 22
“Front–Panel Display Assembly Troubleshooting” on page 30
If other conditions occur... Go to this section...
Unlocked Conditions
Unleveled Conditions
Adjustment Problems
Performance Test Problems
“Troubleshooting Unlocks” on page 104
“Troubleshooting Unlevels” on page 108
“Troubleshooting Adjustment Problems” on page 116
“Troubleshooting Performance Test Problems” on page 120
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