Minolta XD - Page 22

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8) When the specified time has elapsed after opening of the first curtain, shutter magnet
M3 is demagnetized by signal m from speed control circuit, thus closing the second
curtain to complete the exposure.
@ When shutter speed dial is at X, B, O, the circuit input becomes nearly earthed at X
sec.
Then output information i is sent to magnet M3 via speed control circuit so that
shutter speed is at least 1/125 sec.
When exclusive strobo is mounted and fully charged, the circuit is operated at X sec.
by information p irrespective of photography mode and shutter speed dial position, and
then information is sent to magnet M3 so that shutter speed is at least 1/125 sec.
However, M3 is sometimes maintained via Ty, and the strobo is operated by synchro
switch X-contact and then no information exists. Therefore, M;
is released, allowing
the second curtain to run, thus completing the strobo photography.
9-2. Mechanical switch and operation
Mark Name Function
Si Exposure prevention SW. for Interlocked with film advance release lever and turned ON
magnetic release. when winding lever is returned to start position.
S3 Release switch. Interlocked with release plate and turned ON with 1mm
shutter button stroke.
S, Trigger switch (timing SW.) Located on shutter side, interlocked with timing cam, and
counting of exposure time is started at OFF.
Ss Main switch (indication SW. ) Interlocked with released plate and supplies power to camera
and operates LED.
Se Memory switch Interlocked with mirror stop lever and turned OFF when
mirror starts rising and used to memorize stop-down metering
information.
S; Exposure control trigger switch | Located in magnetic release magnet block, interlocked with
magnetic piece and maintains power source at OFF. Turns on
diaphragm magnet and shutter magnet and turns off LED.
Ss Indication mode selector switch | Interlocked with photography mode selector.
Ss» AUTO/MANUAL changeover Interlocked with photography mode selector.
switch
Sin | Exposure control change switch | Interlocked with photography mode selector.
Siz
|
MD
switch
Interlocked
with
MD
coupler
when
MD
lens
is
mounted
and
set at minimum exposure.
Sis | Indication mode selector switch | Interlocked with photography mode selector.
Sis
|
Winding
order
switch
for
winder
|
Gives
winding
order
to
winder
from
camera
side
when
auto
winder is mounted.
Interlocked with winding stop lever.