CI Maintenance 6
5975 Series MSD Operation Manual for MassHunter 165
To Remove the CI Source
Materials needed
• Gloves, clean, lint-free
• Large (8650-0030)
• Small (8650-0029)
• Pliers, long-nose (8710-1094)
Procedure
1 Vent the MSD. See “To Vent the MSD” on page 85.
2 Open the analyzer chamber. See “To Open the Analyzer Chamber” on
page 88.
Make sure you use an antistatic wrist strap and take other antistatic
precautions before touching analyzer components.
3 Disconnect the seven wires at the ion source. Use the pliers to pull on the
metal connectors at the source. Do not bend the wires any more than
necessary. See Table 23 on page 165 for color coding of the wires.
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.
Table 23 Standard CI 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
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