General Maintenance 4
5975/5977 Series MSD Operation Manual 97
4 If you are using an extractor ion source, disconnect the eight wires from
the ion source. Do not bend the wires any more than necessary (See
Figure 12 on page 98).
Table 17 Standard and inert 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
Figure 11 Removing the standard EI ion source
Feedthrough board
Ion source
Thumbscrews
Source heater and
temperature sensor wires
Source radiator
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