Agilent Technologies 5977B Series Operating Manual page 161

These are the parts that contact the sample or ion beam. The other parts
normally should not require cleaning.
If insulators are dirty, clean them with a cotton swab dampened with reagent-grade
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methanol. If that does not clean the insulators, replace them. Do not abrasively or
ultrasonically clean the insulators.
Figure 50
The filaments, source heater assembly, and insulators cannot be cleaned
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ultrasonically. Replace these components if major contamination occurs.
3 If the contamination is serious, such as an oil backflow into the analyzer,
.
Do not use the abrasive slurry on the source mount bushings.
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5977B Series MSD Operating Manual
Source body
Lens 1
EI HES parts to be cleaned
seriously consider replacing the contaminated parts
Source mount
Repeller
with bushings
2 3
General Maintenance
Filament block
4 5
6
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