Minolta Maxxum 9000 - Page 17

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7. Summary of body controlling circuit
Tat ster bide controling ME
Metering switch ON ~ IC) starts to activate.
Ambient light metering is activated by compound SPC, BV data (A/D converted by C2) inputs to IC;
through IC.
IC,
calculates
data
corresponding
to
setting
conditions
(ISO,
exposure
mode,
lens
information,
etc.'.
and displays
calculations
in
LCDs
through
IC).
Release switch ON —~ Attraction of shutter magnets (for Ist and 2nd shutter blades) simultaneous
with output of imprinting signal and separation of preset magnet to starts aperture stop-down activay
tion.
Counts pulse generated by rotation of aperture slit plate corresponding to amount of setting aperture
to control aperture.
Completion of pulse-count ~ Separation of preset magnet simultaneous with release of mirror magnet
= Mirror starts to swing up.
Compl ing up — Release of Ist shutter blade locking > Separation of 1st shutter
blade controlling magnet — Ist shutter blade starts to travel.
IC, counts shutter speed — Completion of shutter speed counting.
Separation of 2nd shutter blade controlling magnet — 2nd shutter blade starts to travel (completion
of shutter exposing) — Completion of 2nd shutter blade traveling — Aperture opens fully. mirror
swings down and winding stopper releases.
jon of mirror swir
8. Function of encoder
AF, aperture st plate
ear
Counts pulse generated by rotation of AF slit plate
interlocking with Mz rotation, monitors AF coupler
rotation (lens shifting monitor)
© Aperture
ptt 4 £9 Counts pulse generated by rotation of aperture slit
Aoerture
6%
eerie
iC.
plate
interlocking
with
stop-down
operation,
monitors
shifting amount of aperture ring.
AF, aperture
roto marr