3-4. FC-75 Board
(1) Auto iris DC servo circuit
IC401 controls the lens drive signal according to the
illuminance of the subject. SW401 switches VS servo and
(2) Various function select switches
DIP switch (SW405), rotary switches (SW403, 404), slide
switch (SW401), and tactile switch (SW402) are arranged.
3-5. IR-29 Board
A noise filter and auto iris lens connector are arranged on
3-6. CT-194 Board
Input/output pins, control switches, and variable resistors
for adjustment are arranged on this board.