Olympus CK40M FRAME Repair Manual - Page 34
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CK40M
7-2
Checking parfocality
1)
Align the white scale with the red scale on KN0048.
2)
Using the focusing telescope, focus on the cross hairs in the KN0048.
3)
Turning the helicoid ring of the standard eyepiece, focus on the wave pattern of the
specimen in the standard objective.
4)
If the movement amount from the scale position of 2) is within 12 graduations in the
clockwise and counterclockwise directions, the parfocaility check is completed.
• If the result of parfocality checking is not acceptable, loosen the SCREW ƒ and check whether
the LENS ASS'Y ‚ is screwed to the contact surface of the TR BODY ASS'Y •.
If no problem is found as a result of the above checking, select a spacer (for parfocality) to insert
it. (Thickness t=1.5, 1.8, 2.0, 2.2, 2.5)
Spacer selection method
1. Assemble the TR body ass'y temporarily using a 2.0 mm thick spacer.
2. Check the parfocality by the procedure explained in the previous page. If the parfocality
position is 14 and 17 graduations in the plus direction, use a 2.2 mm spacer and a 2.5 mm
spacer, respectively. If it is 14 graduations and 17 graduation in the minus direction, use a
1.8 mm spacer and a 1.5 mm spacer, respectively.
3. One graduation on the helicoid scale of standard eyepiece is 0.1 mm.
Standard: Within ±12 graduations on the helicoid scale of
standard eyepiece
C. REPAIR PROCEDURE
•
ƒ
C-13
‚