4-60 Maintenance Procedures
Removing the differential aperture from the ion guide
Required material
Small, flat-blade screwdriver
To remove the ion guide differential aperture:
1. Use the small, flat-blade screwdriver to remove the 3 slotted screws that
secure the differential aperture to the 3 supporting rods.
2. Remove the differential aperture from the ion guide.
Caution: Sensitivity may be reduced if the differential aperture is
aligned incorrectly during refitting. Only remove and clean the
differential aperture if cleaning the ion guide assembly fails to
remove all visible contamination from the differential aperture.
Supporting rods
Differential
aperture
Slotted screws
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