(4) The jog timer, cycle timer, feed signal timer, and replenishment timer are
located on this board.
(5) The transistor drive circuitry powers the following functions from the +20
volt power supply:
(b) Run light and run/standby temperature relay.
(d) Audible signal.
(e) Replenishment pump relay.
The following controls are on the timer board:
(b) S1: Replenishment switch.
"High" means a high film usage installation where jog cycle replenishment is
not needed. "Low" means a low usage installation.
BROAD LEVEL THEORY OF OPERATION--AFP 14-X3
a. Power Board. Refer to figure 4-1.
(1) Power supply. A 16vac transformer T-1 supplies the low voltage (+20
and +12vdc) power.
(a) CR-5 on the power board rectifies this.
(b) Capacitor C1 filters it.
A 7812 three terminal regulator regulates the 12vdc.
(d) Capacitors C2 and C3 bypass the regulator and prevent