Advanced Maintenance . 81
3. Install the standard sample holder baseplate, but remove the sample holder itself by
unscrewing the knurled screw.
Figure 48 Knurled screw
4. To remove the filter wheel, loosen the set screw that secures it to its shaft using a
1.5 mm Allen key, and then gently ease the filter wheel off the shaft, rotating the filter
wheel as required to clear the filter wheel from the other instrument components.
Take care not to remove the spacer ring from the spindle, as this may be lost.
NOTE: If the set screw is not accessible, you may not have moved the filter wheel to
Position 1 as described in Step 1.
Figure 49 Filter wheel securing screw
CAUTION
Avoid touching the filters.
Some of the filters are quite difficult to see.
5. Place the assembly face down on the sample holder baseplate.
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