6 General Maintenance
188 5977B Series MSD Operating Manual
To Assemble 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 60 and EI XTR parts list Table 22 on
page 189 while using this procedure.
1 Slide the ceramic washer into the source body.
2 Insert the extractor lens into the source body, flat side first.
3 Insert the entrance lens and ion focus lens into the insulator in the order
shown in Figure 60 on page 189.
4 Slide the insulator containing the ion focus and entrance lens into the
source body, with the ion focus lens against the extractor lens.
5 Install the two gold plated setscrews that holds the lenses in place.
6 Assemble the repeller assembly.
a Install the repeller block insert into the source heater block assembly.
b Install the repeller insulators into the source heater block assembly and
repeller block insert.
c Install the repeller through the repeller insulators, then put the flat
washer followed by the belleville spring washer onto the end of the
repeller shaft and secure finger tight with the repeller nut.
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.
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