4 Maintenance Procedures
144 January 11, 2016, 715004599 Rev. B
To fit the differential aperture and the differential aperture support onto the
ion guide assembly:
1. Check the condition of the O-ring between the differential aperture and the
differential aperture support. If necessary, use the O-ring removal kit to remove and
replace the O-ring.
2. Use the flat-head screwdriver to fit and tighten the three screws that secure the
differential aperture to the differential aperture support.
3. Place the differential aperture support in position against the ion guide assembly.
4. Use the 2.5-mm Allen wrench to fit and tighten the four screws that secure the
differential aperture support to the ion guide assembly.
5. Reconnect the electrical cable from the ion guide assemble to the differential
aperture support.
Fitting the ion guide assembly and differential aperture onto the
pumping block assembly
Required materials
• Clean, chemical-resistant, powder-free gloves
•3.0-mm Allen wrench
Warning: To avoid spreading contamination, dispose of the O-rings
in accordance with local environmental regulations. The O-rings can
be contaminated with biohazards or toxic materials.
Warning: To avoid personal contamination with biohazards or toxic
materials, and to avoid spreading contamination to uncontaminated surfaces,
wear clean, chemical-resistant, powder-free gloves when working with the
source components.
Notice: To avoid damaging the ion guide assembly when removing it from
the pumping block assembly, do not grasp the ion guide by its metal lens
plates. Instead, grasp the circuit boards on the top and bottom of the device.
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