Agilent Technologies 5975T LTM GC/MSD, Troubleshooting And Maintenance Manual

Page: 139 / 270

General Maintenance
10
Troubleshooting and Maintenance Guide 139
To Remove the EI Ion Source
Materials needed
• Gloves, clean, lint-free
• Large (8650-0030)
• Small (8650-0029)
• Pliers, long-nose (8710-1094)
Procedure
1 Vent the instrument.
2 Open the analyzer chamber. See the 5975T LTM GC/MSD
Operation Manual.
3
Make sure you use an antistatic wrist strap and take other
antistatic precautions before touching analyzer components.
4 Disconnect the seven wires from the ion source. Do not bend
the wires any more than necessary (
Figure 11 and Table 7 ).
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 7 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


C A U T I O N
Pull on the connectors, not on the wires.