Analyzer 7
5977B Series MSD Troubleshooting and Maintenance Manual 207
As the EM horn ages, the voltage (EMVolts) required increases over time. If the
EM voltage must always be set at or near –3,000 VDC to complete Autotune,
with no other probable cause, it may need to be replaced. Check your tune
charts for gradual degradation, which indicates wearing out. Select the Tune
Plot icon from the Program menu of your desktop to see the tune plots. Sudden
changes usually indicate a different type of problem.
See Also
• Troubleshooting in the online help for more information about symptoms
that may indicate EM problems.
Figure 49 The detector
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