158 5977 Series MSD Operation Manual
6 CI Maintenance
4 Trace the wires for the ion source heater and temperature sensor to the
feedthrough board. Use the pliers to pull on the metal connectors to
remove these four wires from the feedthrough board connections.
5 Remove the thumbscrews that hold the ion source in place.
6 Pull the ion source out of the source radiator.
Table 28 Standard CI 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
CAUTION
Pull on the connectors, not on the wires.
WARNING
The analyzer operates at high temperatures. Do not touch any part until you are sure
it is cool.
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