Agilent Technologies 7000 Triple Quadrupole GC/MS, Maintenance Manual

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162 Troubleshooting and Maintenance Manual
7
Analyzers and Collision Cell
As the EM horn ages, the voltage (EMVolts) required increases over time. If the
EM voltage must always be set at or near –3000 VDC to complete Autotune,
with no other probable cause, it may need to be replaced. A warning message
will alert you if more then 3000 volts are needed to achieve the gain values.
Figure 33 The detector
High voltage in
EM horn
Horn latch
Signal out