Figure 3–8: Removing the pumping block and ion guide
Securing screws
Pumping block
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 the figure
"Removing the differential aperture" in step 5 of this topic).
Recommendation: Clean the differential aperture (see Cleaning the differential
aperture) 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 Cleaning the ion guide assembly).
5. If the differential aperture O-ring is visibly damaged, replace it.
June 15, 2017, 715003956 Rev. F
Page 41
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