Minolta XD - Page 11

(Drive mechanism charge)
1) Shutter is charged when set-lever @ is pushed in the direction of the arrow by shutter
charge pin on the body side.
2) Then upper cam part @) of set-lever in the sector drive mechanism pushes up opening
lever @ via opening lever roller @ so that bend © of operation lever @ on opening
lever is engaged with stop @ of open/close lever ©.
3) On the other hand, upper cam part ©) of opening lever pushes up closing lever @ via
closing lever roller © until it is engaged with closing lever claw @®, thus completing
the charge of drive mechanism.
(Exposure control mechanism charge)
1) When set-lever @ is cocked, set-lever pin @) pushes and part © of timing cam set gear
@ thus rotating timing cam @ clockwise to charge the mechanism.
2) Timing cam first moves off part ( of opening lever claw @® and stops open/close lever
©.
3) Next, sticking piece @ of sticking lever @ is pressed against magnet core (6 by cam
part @) via sticking lever roller @. After that, timing cam stop @ is stopped by release
lever @ thus completing the exposure control mechanism charge.
(Shutter release)
1) When shutter button is depressed, camera is released, and switch is operated just before
operation of preset lever. Then power is supplied to the magnet for shutter speed
control.
2) Shutter release lever on the camera side pushes down release lever @) just before com-
pletion of mirror raising, thus releasing the timing cam to start the shutter.
3) Timing cam @) rotates counterclockwise to operate timing switch and to start the speed
control circuit on the camera side.
4) Next, timing cam rotates opening lever claw @ clockwise to release open/close lever ©),
and then first curtain is driven (opened) by first curtain drive roller QQ.
5) When magnet is demagnetized by speed control circuit after lapse of the specified time,
sticking lever @) rotates clockwise and the pin of sticking lever acts on bend @ of
closing lever claw to release closing lever @.
6) Then second curtain is driven (closed) by second curtain drive roller @), completing the
specified exposure. When the first curtain operation has been completed, bend @ of
opening lever is stopped by set-lever, preventing the first curtain from bouncing.
7) Just before completion of operation of closing lever @, closing lever roller © on closing
lever hits end part & of operation lever @ to release open/close lever © thus re-start-
ing the first curtain to cover the opening.
8) On the other hand, return signal lever on mirror box side is pressed down by closing
lever tip @ to lower the mirror.