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

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146 Troubleshooting and Maintenance Guide
10
General Maintenance
To Reassemble the EI Ion Source
Materials needed
• Gloves, clean, lint-free
• Large (8650-0030)
• Small (8650-0029)
• Hex ball driver, 1.5 mm (8710-1570)
• Hex ball driver, 2.0 mm (8710-1804)
• Wrench, open-end, 10 mm (8710-2353)
Procedure
1 Slide the drawout plate and the drawout cylinder into the
source body (
Figure 14 ).
2
Assemble the ion focus lens, entrance lens, and lens
insulators.
3 Slide the assembled parts into the source body.
4 Install the setscrew that holds the lenses in place.
5 Reinstall the repeller, repeller insulators, washer, and
repeller nut into the source heater assembly.
The resulting assembly is called the repeller assembly.
6
Reconnect the repeller assembly to the source body. The
repeller assembly includes the source heater assembly,
repeller, and related parts.
7
Reinstall the filaments.
8
Reinstall the interface socket


C A U T I O N
Do not overtighten the repeller nut or the ceramic repeller insulators
will break when the source heats up. The nut should only be
finger-tight.
C A U T I O N
Do not overtighten the interface socket. Overtightening could strip
the threads.