Teardown, Cleaning, and Reassembly of the Miscellaneous Parts of the Olympus BH-2 Microscope Frames Revision 1 Page 41 of 45
Using cotton swabs and a suitable solvent (e.g.,
alcohol), thoroughly clean the knurled field-adjustment
ring (see Figure 178, plastic/brass version shown). Do
not use acetone here, as acetone will attack the plastic.
Figure 178 – Thoroughly clean the field-adjustment ring
Using cotton swabs and a suitable solvent (e.g.,
alcohol), thoroughly clean the filter holder (see Figure
179, metal version shown). Do not use acetone on the
plastic version, as acetone will attack the plastic.
Figure 179 – Thoroughly clean the filter holder
Reinstall the Light Exit Assembly Frame onto the Base
IF APPLICABLE: Carefully position the frame of the Light
Exit Assembly into the cutout on the base casting,
making sure you do not touch or damage the fragile
primary surface mirror (see Figure 180).
Figure 180 – Re-install Light Exit frame into base cutout
Align the three holes in the Light Exit frame with the
tapped holes in the base casting (see Figure 181).
Figure 181 – Align holes in the frame with tapped holes
Using a suitable JIS screwdriver, reinstall the three
m2.6x6 screws to secure the Light Exit frame to the
base casting (see Figure 182).
Figure 182 – Secure the Light Exit frame to the base
Refer to the Collimating the Integral Substage Lighting
section of this document to determine whether or not
to collimate the substage lighting at this time.
Reassemble the Light Exit Assembly
If the knurled field-exit ring is the type with the brass
insert molded into place, apply a light coating of a
suitable light grease (item 2 of Appendix 1) to the brass
bearing surface within the knurled ring (see Figure 183).
Figure 183 – Apply grease to brass surface in field ring
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