6 General Maintenance
158 5977B Series MSD Operating Manual
11 Remove the five lenses from the lens insulator/holder.
Use care when removing the filament from the filament block. Putting excessive stress
on this can break or crack it. If this happens, do not attempt to operate with a defective
filament, it must be replaced.
Figure 49 Exploded parts view of the EI HES
1
2
8
16
17
15
9
4
3
11
10
6
5
7
13
12
14
8
12
Table 1 7 Parts list for EI HES (Figure 49)
Item number Item description Part number
1 Source finger grip G7002-20008
2 Filament block G7002-20019
3 Extractor lens (5)*, with 3 mm opening G7002-20061
4 Ceramic insulator for extractor G7002-20064
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