7 General Maintenance
To Disassemble the EI XTR Source
5977B Series MSD Operating Manual 201
To Disassemble the EI XTR 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
Refer to the exploded parts view Figure 65 and the EI EXT parts list Table 21 on
page 202 while using this procedure.
1 Remove the EI XTR source. (See “To Remove the EI XTR, SS, or Inert
Source” on page 196.)
2 Remove the filaments by removing the two gold plated screws and
separating the filaments from the source.
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 insulator from the front side of the
source heater block assembly, then remove the repeller, insulator, and
repeller block insert from the opposite side.
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