Nikon coolpix L100 Repair Manual page 68

INC
VMA43007-R.3780.A
4. Lens drive block
4-1. Shutter drive
The serial data signals (L_DATA) and (L_LATCH, SHUTTER,
LENS_ST and L_SCLK) which are output from the ASIC
(IC101) are used to drive regular current (SOUT1 and SOUT2)
by the motor driver (IC951), and then mecha shutter is opened
and closed.
4-2. ND filter drive
The serial data signals (L_DATA) and (L_LATCH, IRIS,
LENS_ST and L_SCLK) which are output from the ASIC
(IC101) are used to drive regular current (IOUT1 and IOUT2)
by the motor driver (IC951), and then the ND filter is inserted
into and removed from the beam path.
4-3. Focus drive
The serial data signals (L_DATA) and (L_LATCH, FCLK,
LENS_ST and L_SCLK) which are output from the ASIC
(IC101) are used to drive (FOUT_A+, FOUT_A-, FOUT_B+
and FOUT_B-) by the motor driver (IC951), and then used to
drive the focus stepping motor. Detection of the standard fo-
cusing positions is carried out by means of the photointerruptor
(F_HP) inside the lens block.
4-4. Zoom drive
The serial data signals (L_DATA) and (L_LATCH, ZPWM,
LENS_ST and L_SCLK) which are output from the ASIC
(IC101) are used to drive (ZOUT1 and ZOUT2) by the motor
driver (IC951), and then used to drive the zoom DC motor.
Detection of the standard zooming positions is carried out by
means of photointerruptor (Z_HP) inside the lens block. Also,
detection of the zooming relative positions is carried out by
the ASIC (IC101) counting the photointerruptor (Z_ENC).
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