Sanyo VPC-S60 Service Manual page 6

4. Lens drive block
4-1. Shutter drive
The shutter drive signals (SIN1 and SIN2) which are output
from the ASIC are used to drive (SHUT (+) and SHUT (–))
the shutter constant level driver (IC951), and then shutter is
opened and closed.
4-2. Iris drive
The iris stepping motor drive signals (IIN1 and IIN2) which
are output from the ASIC (IC101) are used to drive (IRIS (+)
and IRIS (–)) by the motor driver (IC951), and are then used
to drive the iris steps.
4-3. Focus drive
The focus stepping motor drive signals (FIN1, FIN2, FIN3 and
FIN4) which are output from the ASIC (IC101) are used to
drive (AFSPM (1) +A, AFSPM (2) –A, AFSPM (3) +B and
AFSPM (4) –B) by the motor driver (IC951). Detection of the
standard focusing positions is carried out by means of the
photointerruptor (AFPI) inside the lens block.
4-4. Zoom drive
The zoom DC motor drive signals (ZIN1 and ZIN2) which are
output from the ASIC (IC101) are used to drive (ZM (+) and
ZM (–)) by the motor driver (IC951). Detection of the standard
zooming positions is carried out by means of photoreflector
(ZMPR_E) inside the lens block. Getting of the zoom positions
is carried out by means of the photo-interrupter (ZMPI_E) by
ASIC (IC101) is counting inside the lens block.
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