28
EXA IIa Repair Manual.
Basic Remarks:
The camera under repair is placed with the lens mount 300.21 U 6 to the front, i.e. in the photograph
taking direction.
Right: Side with wind-lever 370.41 U6.
Left: Side with time-setting ring 370.41-18.
All screws and nuts have right-hand threads. Never use force! All screws secured with lacquer are to
be so secured on assembly.
A. Disassembly of camera.
1. Take off the back cover 370.20.
a)Remove the take-up spool 370.09.
2. Remove the top-plate 370.41 U1.
a) Set the time-setting ring 370.41-18 to ½ sec.
b) With the special tool undo the cover ring 370.41-21 [means the index ring on the right – use
a friction tool].
c) Hold the frame-counter disc 370.41-25 with the special tongues and undo the screw for the
frame-counter disc 370.41-28 with the special tool.
d) Take off the film-counter disc, as well as any shims that may be fitted.
e) Mark the position of the inter-ring 370.41-20 [the ring retaining the film-speed reminder],
and undo the three flat-head [cheese-head?] screws M1.4 x 2 DIN 84.
f) Take off the inter-ring with the film-type ring 370.41-20 and the spring shim 370.41-27.
g) Remove circlip 4 DIN 6799, shim 370.01-79 (as many as present), and the 3 fixing screws
M1.4 x 3 DIN 63 for the wind-lever 750-005.00. Withdraw the wind-lever (Note the
position of the wind-lever relative to the Schaltsegment 370.43 U1 [the turning part on the
camera] and the shim 370.41-26).
h) Remove the spool-retaining spring 300.15 U 12 from the rewind sleeve 370.41-24, and
unscrew the sleeve[centre screw] (pay attention to compression spring 370.01-90, shim
370.01-87/2 and spacer 370.01-69). Pull out the rewind spindle370.41 U4.
i) Remove the circlip 370.04-48 for the time-setting disc 370.41-18, and the spring washer
370.04-45. Loosen the time setting disc from the flat on its bush 370.41 U7 and withdraw it
(press against the bush in order that the mesh of the gear teeth should not be altered).
j) Pull off the shutter-lock lever 370.41-40 or shutter-lock knob 370.41-31.
k) Undo the 4 fixing screws 350.21-32 for the top-plate.
l) Take off the top-plate.
m) Fit again the wind-lever with 3 screws, shim and circlip.
n) Mark the position of the time-setting wheel (gear-wheel on sleeve 370.04 U7) on the
mechanism [mark the mesh of the gears?] and refit the time-setting disc.
3. Removal of mechanism 370.43.
a) Remove the 2 screws M1.7x8 DIN 84 in each film chamber.
b) Lift out the mechanism from the body-shell 370.48.