3. Inspect the source enclosure O-ring and ensure that it is fitted correctly and undamaged.
Refit or replace the O-ring as required.
4. Place the ion block assembly against the ion block support on the front of the instrument,
aligning the screw positions.
5. Secure the ion block to the instrument using the two screws and tighten them using the
2.5-mm hex wrench.
6. Reassemble the gas cone assembly, and then refit this to the PEEK cone clamp (see
Replacing the aperture disc (Page 32)).
7. Refit the PEEK cone clamp and the gas cone assembly to the ion block.
8. Refit the source enclosure (see Fitting the source enclosure to the instrument (Page 30)).
3.10 Cleaning the ion guide assembly
Clean the ion guide assembly when these conditions apply:
• Cleaning the source components fails to increase signal stability.
• Replacing the entrance aperture seal and disc fails to increase signal stability.
3.10.1 Removing the ion guide assembly from the source assembly
Required tools and materials
• Chemical-resistant, powder-free gloves
• 2-mm hex wrench
• 3-mm hex wrench
• Flat-blade screwdriver
Warning: To avoid personal contamination with biologically hazardous or toxic compounds,
wear clean, chemical-resistant, powder-free gloves when performing this procedure.
Warning: To avoid burn injuries, exercise care when handling the components of the
source enclosure heated to high temperatures. Wait until the hot components have
sufficiently cooled before you handle them.
Notice: To avoid damaging the ion guide assembly, handle it and its components
carefully throughout the cleaning procedure. In particular, do not touch the wiring.
Important: Ensure that the instrument is powered-off before performing this procedure.
August 20, 2021, 715005003 Ver. 04 (Previously released as Revision C)
Page 40
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