Nikon 50i and E100 manual Repair ANO

	R-4106.A
REPAIR ANO	5. lnterµupillary Distance Chlln<JtiS by ltsetf
ADJUSTMENT	6. Dirt in ttte Optical System (Fiam, Unctear lmage of Dust or ttte Like in the Viewfield)

5. lnterpupillary Distance Changes by ltself

Cause: (!) Breakage, deformat1on or wear of wave-formed washer @C@)).

(2)Loosening of torque adjusting screw @e@).

<Repair and Adjustment >

ln the case of (1) ...... Refer to 4. Not smooth operation of interpupillary distance adjustment,

cause (2 ).

ln the case of (2) ...... Fasten positively the torque adjusting screw @ C@).so that the

torque is 1.5 - 2 Kg (Fig. 18).

Note: Ali the tubes ot X and Y microscopes being ot Siedentopt type. where the tightness of interpup1llary distance adjustrnent is determmed by bending of wave-fonned washer @U§)), the tightness is adjustable by fastening '®t@).

Procedure

1)Remove central axle cap @ C@). Since the screw is attached with No. 350, use alcohol for remova!.

2)Fasten the torque adjusting screw @ (@)to make the torque l .5 - 2 Kg.

3)Attach central axle cap @ C@).

4)Finally, see that the interpupillary distance does not change by itself.

6.Dirt in the Optical System (Flare, Unclear lmage of Dust or the Like in the Viewfietd)

Cause: (1) Finger marks, oil or the like on the light incidence surface of p~sm @ Cê and @).

(2)Large dust on the surfaces of prisms @ and @ or prism @.

<Repair and Adjustment >

ln the case of (1) ...... Wipe lightly using a cloth or lens tissue $0aked with a triíle of absolute

alcohol (ethanol or rnethanol).

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