June 28, 2016, 715003956 Rev. C
Page 39
Figure 3–7: Removing the pumping block and ion guide
4. Remove the 3 slotted screws securing the differential aperture to the ion guide housing
using the flat-blade screwdriver, and then remove the differential aperture (see page 40).
Recommendation: Clean the differential aperture (see page 41) before disassembling the
ion guide housing. If cleaning the differential aperture fails to increase signal sensitivity,
continue with this procedure, and then clean the ion guide (see page 42).
5. If the differential aperture O-ring is visibly damaged, replace it.
Securing screws Pumping block
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