Teardown, Cleaning, and Reassembly of the Miscellaneous Parts of the Olympus BH-2 Microscope Frames Revision 1 Page 29 of 45
Servicing the Field Diaphragm Assembly (New Style)
This section applies only to the newer style assembly
(see Figure 75). The older style assembly was covered
previously in this document.
Disassemble the Field Diaphragm Assembly (New Style)
Using a suitable JIS screwdriver, loosen and remove the
four m2.6x5 screws securing the brass retaining plate
onto the metal diaphragm stator. See Figure 112.
Figure 112 – Remove screws securing brass plate to stator
Rotate the brass retaining plate until the notch in the
plate aligns with the tab on the plastic diaphragm rotor.
See Figure 113.
Figure 113 – Align plastic tab with notch in brass plate
Lift and remove the brass retaining plate from the metal
diaphragm stator. See Figure 114.
Figure 114 – Lift and remove the brass retaining plate
Carefully lift and remove the plastic diaphragm rotor
from the metal diaphragm stator. See Figure 115.
Figure 115 – Lift and remove the plastic rotor from stator
Beneath the diaphragm rotor, there are 10 diaphragm
leaves positioned within the circular recess of the metal
diaphragm stator (see Figure 85). Disassemble the
leaves of the iris diaphragm per Figure 86 and
accompanying text.
Clean Components of Field Diaphragm Assembly (New Style)
Using a suitable solvent, thoroughly clean any
contamination from the diaphragm leaves (see Figure
88). Acetone may be used if the leaves are metal. Do
not use acetone if the leaves are plastic, as this will
dissolve the plastic. Use a plastic-safe solvent, such as
alcohol, if this is the case. Using a suitable solvent such
as acetone, clean any contamination from the metal
diaphragm stator (see Figure 87). Using a suitable
solvent such as alcohol, clean any contamination from
the plastic diaphragm rotor. Do not use acetone here,
as this will dissolve the plastic. See Figure 116.
Figure 116 – Thoroughly clean the plastic rotor
Reassemble the Field Diaphragm Assembly (New Style)
Carefully reassemble the diaphragm leaves into the
circular recess of the metal diaphragm stator per Figure
90 through Figure 100 and the accompanying text.
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