Disassembly and Replacement
Filter wheel (335901-120S [Vis Only]; 335902-120S [UV-Vis Only])
Removal
1. Remove the Monochromator cover (refer to “Monochromator ").
2. Carefully unscrew the center screw from the filter wheel.
Figure 5.10 Filter wheel
3. Lift the filter wheel out of its location, noting the orientation of the filter wheel, and remove the
screw and washers. Do not change the orientation of the spring washer.
Replacement
1. Insert the screw with washers through the center hole of the filter wheel making sure the orientation
of the wheel is proper so it will mesh with the drive gear.
2. Locate the filter wheel in position and tighten the screw.
3. When all other work is complete, replace the Monochromator cover (refer to "Monochromator ").
Sample Detector (335901-6034 [UV-Vis Only]; 335901-6044 [Vis Only])
Removal
1. Remove the Beam Splitter and turret cover (refer to "Beam splitter and turret cover ").
2. Remove the Sample Detector cover.
NOTE: One of the screws for the Sample Detector cover is common to the Beam Splitter and
turret cover and is removed when that cover is removed.
5-10
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