6
Maintenance
Completely Disassembling and Reassembling the Ion Source
Thermo Scientific TSQ Quantum XLS Series User Guide 97
7. Pull the heater ring off the ion source.
8. Unscrew and remove the three base studs.
9. Remove the EI/CI Source PCB:
a. Place the ion source on a clean surface with the cartridge heaters down and the EI/CI
Source PCB up.
b. Press down on the ion source block to separate it from the EI/CI Source PCB.
10. Remove the retainer clip that secures the filament and centering ring to the ion source
block.
11. Remove the filament and centering ring from the ion source block.
12. Clean the ion source block and lenses. See “Cleaning Stainless Steel Parts” on page 98.
Clean non-stainless steel parts as described in “Cleaning Non-Stainless Steel or Hybrid
Parts” on page 100.
Y To reassemble the ion source
1. Reinstall the EI/CI Source PCB:
a. Align and insert the cartridge heaters and temperature sensor on the EI/CI Source
PCB with the corresponding holes in the ion source block.
b. Reinstall the three base studs.
2. Reinstall the filament and centering ring:
a. Insert the filament into the centering ring.
b. Align the filament leads with the EI/CI Source PCB connectors and gently press the
leads into the connectors. Normally, there is a small gap of about 0.4 mm (0.016 in.)
between the filament and the connectors. The gap allows the ceramic centering ring
to properly position and align the electron lens hole with the ion volume.
c. Secure the filament and centering ring with the retainer clip.
3. Press the heater ring and lens assemblies onto the ion source block.
4. Use the retainer clip and threaded standoff to secure the heater ring lens assembly to the
ion source. See Figure 55 on page 96.
CAUTION To prevent damage, do not pull the EI/CI Source PCB out of the ion
source block.
IMPORTANT Ensure that the temperature sensor is seated snugly.
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