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B. Assembly of camera.
1. Insertion of mechanism 370.53.
As under Disassembly of Camera A3 but in reverse order, engaging with the pinion on the
sprocket-spindle 370.51-4. Check for correct functioning (including flash contact).
2. Fitting the top-plate 370.51 U 1.
As under Disassembly of Camera A2 but in reverse order.
NB:
When putting on the top-cover 370.51 U 1, with the aid of a small screwdriver through the
right top-cover opening, press the lock-lever 370.44-18 leftwards to the stop [means the rewind
button lever, I think]. Check for correct functioning.
3. Check and adjust the distance between the lens mount and the film plane.
See Repair Manual for EXA II B.3.
4. Check and adjust the mirror position.
(Collimator is set to infinity).
a) Example 1:
The greatest sharpness lies before the infinity stop of the lens: Slacken slightly the fixing
screw for the mirror adjusting eccentric 370.53-4 and turn the eccentric clockwise until the
best focus is obtained at the infinity mark of the lens. Re-tighten the fixing screw and secure
[i.e. lacquer]. Check the focus again.
b) Example 2:
The greatest sharpness is not yet obtained at the infinity stop of the lens (ie. the point of
sharpest focus would lie beyond the infinity stop): Slacken slightly the fixing screw for the
mirror adjusting eccentric 370.53-4 and turn the eccentric anti-clockwise until the best focus
is obtained at the infinity mark of the lens. Re-tighten the fixing screw and secure. Check
the focus again.
C. Elimination of certain faults.
(As a result of the development of the Exa II/IIa to the Exa IIb minor deviations in different
elements arise.).
1. Cocking segment 370.57 U2 is damaged.
See Repair Manual for EXA II C. 2.
2. Curtains unserviceable.
Dismantle camera, as under Disassembly of Camera A. 1. to A. 3.
For repair procedure, see Repair Manual for EXA II C. 3.
a) to l).
m) Set the spring-spindle tension for the first curtain to 35 g and the spring-spindle tension for
the second curtain to 55 g.
n) Cock the shutter (½ sec must be set).
o) Turn the delay wheel 370.56 U 6 with delay collar 370.56-12 clockwise, until the mirror
falls to the 45º position.
p) Turn the delay wheel anti-clockwise, until pinion 370.56 U 3 is arrested by the lock-lever
for pinion 370.56-16.
