(2) The temperature board senses whether both developer and dryer are at
the proper temperature, and signals the timing board of this fact.
(a) Circuitry is provided to minimize the effect of transient temperature
variations on the ready light.
(b) In normal operation the temperature ready time out function
generates a loss of ready light, 90 seconds after either developer or dryer temperature
has fallen below its proportional control range.
(3) The temperature board has a ramp generator circuit that provides a
proportional control range for the developer and dryer temperature controls.
(4) The temperature board has its own +12vdc power supply. This power
supply prevents fluctuations in the analog signal levels.
are the following controls:
R3: Dryer scale offset.
(d) R4: Developer scale offset.
c. Timing Control Board Function. Refer to figure 4-3.
The timing board contains the developer level sensing circuitry.
(2) The timing board accepts the film switch input and responds by turning
on the replenisher pump.
(3) The timing board has a system clock which controls the time ratio of the
(a) Cycle timer (automatic standby timer).
(b) Feed signal timer (time between films).
Jog timer (automatic anti-crystallization cycle).
(d) Replenishment timer (short burst of replenishment during machine
turn-on and during jog).