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Place the knurled field-adjustment ring into position

over the frame of the Light Exit Assembly, with the edge

of the geared portion contacting the straight edge in

the cutout of the base casting (see

Figure 184 – Place the knurled field ring into position

If the Light Exit Assembly is the all-plastic type (i.e., if

the knurled field-adjustment ring does not contain a

brass insert), apply a thin coating of a suitable light oil

(item 3 of

Appendix

1) to the bearing surface of the

plastic filter holder (see

Figure 185 – Apply oil to the plastic filter holder

Place the filter holder into the center recess of the

knurled field-adjustment ring (see

Figure 186 – Place the filter holder into recess of field ring

Teardown, Cleaning, and Reassembly of the Miscellaneous Parts of the Olympus BH-2 Microscope Frames

Figure

184).

Figure

185).

Figure

186).

Rotate the filter holder until the three screw holes in

the filter holder align with the three tapped holes in the

frame of the Light Exit Assembly (see

Figure 187 – Align holes in filter holder with tapped holes

While temporarily holding the filter holder in this

position, rotate the knurled field-adjustment ring and

observe its range of motion. It may not be possible to

adjust the ring such that the pointer goes from the dot

at the maximum clockwise end of travel to the dot at

the maximum counterclockwise end of travel (see

Figure 188

and

Figure

189).

Figure 188 – Field ring at maximum clockwise point

Figure 189 – Field ring at maximum counterclockwise point

Figure

187).

Revision 1

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