Agilent Technologies MSD 5977B Series Operating Manual page 179

7 General Maintenance
To Remove the EI HES
5 Using the source finger grip, pull the ion source out of the source radiator.
Ion source
Thumbscrew
Ceramic source board
Source finger grip
Thumbscrew
Source heater and
temperature sensor wires
Source radiator
Figure 55 The analyzer chamber for the HES MSD
5977B Series MSD Operating Manual

The source contacts have spring loaded pins so some force must be applied
to pull the source out.
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