102 5975/5977 Series MSD Operation Manual
4 General Maintenance
To Disassemble the Extractor 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 Remove the ion source. See “To Remove the EI Ion Source” on page 96.
2 Remove the filaments by removing the two gold plated screws and
separating the filaments from the source. See Figure 14 on page 103.
3 Loosen the two gold plated screws on the source heater block assembly,
and separate the repeller assembly from the source body. The repeller
assembly includes the source heater block assembly, repeller, and related
parts.
4 Remove the gold plated setscrews from the side of the source body.
5 Pull the entrance lens and ion focus lens to remove them from the source
body.
6 Remove the extractor lens and insulator.
7 Separate the entrance lens and ion focus lens from the lens insulator.
8 Remove the repeller nut, washers, and insulators from the source heater
block assembly, then remove the repeller.
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