7 Troubleshooting | 7.2 Column
ZEISS
5. Carefully turn the adjust key anticlockwise to
unscrew the brass retaining washer.
6. Remove the brass retaining washer.
7. Put the brass retaining washer onto a clean surface.
8. Put your hand closely underneath the firing unit and turn it upside down.
à
The filament holder and the tensator spring
washer (if fitted) slide out and drop into your
hand.
7.2.2.1.5 Cleaning the Firing Unit
Over time, the filament deposits material on the firing unit and the anode. This can damage the
aperture and reduce the filament life time. You need to remove these deposits during every fila-
ment exchange.
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.
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Instruction Manual ZEISS EVO | en-US | Rev. 10 | 354706-0780-006
Summary of Contents for EVO
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