7 Troubleshooting | 7.2 Column ZEISS
2. Remove the top section of the filament holder.
3. Remove the four grub screws at the top section
of the filament holder.
INFO: The grub screws have pointed ends.
4. Use the adjust key to remove the filament.
5. Put all parts of the filament holder on a clean surface.
6. Remove any deposits from the filament holder.
INFO: Over time, the filaments create deposits of tungsten or sublimed material on the fila-
ment holder. You need to remove these deposits during every filament exchange. For gen-
eral guidelines on polishing metal parts refer to Cleaning the Firing Unit [
}
128].
7.2.2.3.2 Unpacking a New Filament | Tungsten (Not Pre-Aligned)
NOTICE
Contamination by dust particles or fingerprints
Dust particles or skin grease can cause contaminations, which lead to flashovers or to bad vac-
uum.
4 Wear lint-free gloves throughout the whole procedure of replacing the filament.
Parts and Tools
Tungsten filament (not pre-aligned): Pack of 10 filaments (350010-2079-000)
Lint-free gloves
Adjust key (350061-1904-000)
Procedure
1. Open the box that contains the not pre-aligned
tungsten filaments.
134 Instruction Manual ZEISS EVO | en-US | Rev. 10 | 354706-0780-006
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