Circuit Descriptions, Troubleshooting, And Alignment; Introduction - Fluke 6080A Service Manual

Circuit Descriptions, Troubleshooting,

INTRODUCTION

The 6080A/AN Synthesized Signal Generator (also referred to as the "signal
generator" is usually repaired most easily by identifying the defective module and
replacing it through the Module Exchange Program (MEP). Alternatively, the
operator can troubleshoot to the component level and replace the defective part. This
section of the manual provides the necessary information for both repair methods.
After any module repair or replacement, the adjustments or actions described in the
paragraphs particular to the module should be completed, followed by the appropriate
performance tests. Signal generator problems are generally caused by operator error,
out-of-specification performance, or by catastrophic failure. The correction strategy is
different in each case.
Although most operator errors are detected and indicated, some are not and may be
mistaken for out-of-specification conditions. Rather, they may be operator errors that
are indicated by either a steady or flashing STATUS indicator or by the REJ ENTRY
indicator. The signal generators's specifications are in Table 1-3. Refer to the Operator
Manual for operating information.
Out-of-specification performance is usually corrected by performing the appropriate
calibration procedure (Refer to Section 3, CLOSED-CASE CALIBRATION.) Use
the performance tests (Section 4, PERFORMANCE TESTS) to determine which
parameters need adjustment.
If the problem is not an operator error and is not corrected by calibration, the signal
generator has had a catastrophic failure. The task is then to isolate the fault and make
appropriate repairs. The STATUS and Self-Test failure codes usually provide a good
indication of the cause of the problem. See Appendix E and Sections 6A through 6F.
In case of catastrophic failure, use the performance tests to help isolate the problem.
The Instrument Block Diagram, Figure 6-1, and the Instrument Troubleshooting Tree,
Figure 6-2, will help to isolate the problem to a specific section.
Section 6
and Alignment
6-1.
6-1