General Maintenance 5
5977 Series MSD Operation Manual 129
4 If you are using an extractor EI ion source, disconnect the eight wires from
the ion source. Do not bend the wires any more than necessary (See
Figure 20 on page 130 and Table 23).
5 Trace the wires for the ion source heater and temperature sensor to the
feedthrough board. Disconnect them there.
6 Remove the thumbscrews that hold the ion source in place.
7 Pull the ion source out of the source radiator.
Table 23 Extractor EI ion source wires
Wire color Connects to Number of leads
Blue Entrance lens 1
Orange Ion focus 1
White Filament 1 (top filament) 2
Red Repeller 1
Black Filament 2 (bottom filament) 2
Brown Extractor lens 1
WARNING
The analyzer operates at high temperatures. Do not touch any part until you are sure
it is cool.
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