Hitachi TM3030 Plus Instruction Manual page 259

NOTE : When handling the components inside the electron gun (the cap, the Wehnelt, the
anode and the cartridge filament), use clean gloves to keep them free of particles
and smudges.
CAUTION: The electron gun weighs 2.5 kg. It might cause finger injury when
opening and shutting. Be careful not to pinch your fingers when opening
and shutting.
5. Pull out the liner tube straight up.
Liner Tube
6. Remove the liner tube; replace the condenser lens aperture.
7. Grasping the top holder, remove the pipe by turning it counterclockwise. A condenser
lens aperture and a holder are built between the Pipe1 and the top holder, and between
the pipe holders and the pipes. Replace the condenser lens apertures with new ones. As
the condenser lens aperture and the holder are small parts, be careful not to accidentally
drop them when removing.
Figure 5.3-3 Removing the Liner Tube
Figure 5.3-4 External View of the Liner Tube
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