Sanyo VPC-S122EXBL Service Manual page 6

4. Lens drive block
4-1. Zoom drive
Drive settings are made by means of the signals (ZIN1, ZIN2)
which are output by the ASIC (IC101). The zoom driving volt-
age (ZOUT+, and ZOUT-) are output in accordance with the
settings from the motor driver IC (IC951) to drive the zoom
DC motor.
Detection of the standard zooming positions is carried out by
means of signal (ZPROUT) from the photoreflector by ASIC
(IC101) is detecting inside the lens block. Also, getting of the
zooming positions is carried out by the ASIC (IC101) count-
ing the photointerruptor (ZPIOUT).
4-2. Focus drive
Drive settings are made by means of the signals (FIN1, FIN2,
FIN3 and FIN4) which are output by the ASIC (IC101). The
focus driving voltage (FOUT_A+, FOUT_ A-, FOUT_B+ and
FOUT_B-) are output in accordance with the settings from
the motor driver IC (IC951) to drive the focus stepping motor.
Detection of the standard focusing positions is carried out by
the ASIC (IC101) detecting the signal (FPIOUT) from the
photoreflector inside the lens block.
4-3. Iris drive
Drive settings are made by means of the signals (IIN1, IIN2)
which are output by the ASIC (IC101). The iris driving voltage
(IOUT1 and IOUT2) are output in accordance with the set-
tings from the motor driver IC (IC951) to drive the moving
magnet motor for iris.
4-4. Shutter drive
Drive settings are made by means of the signals (SIN1, SIN2)
which are output by the ASIC (IC101). The shutter driving
current (SOUT1+ and SOUT2-) are output in accordance with
the settings from the motor driver IC (IC951) and then the
moving magnet motor is used to drive the shutter constant by
these drive signals, and then mecha shutter is opened and
closed.
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