(a) When power is first applied to the processor, the drive system and
the water solenoid activate for 4 1/2 minutes. During the warm-up period, while the processor
is in the jog cycle, additional water enters the tank. If the wash tank is not filled by the time
the first film passes through it, check for a restriction in the incoming line. This could be
caused by a dirty water filter or a shutoff valve that is not completely open.
(b) A flow restrictor and water solenoid regulate the flow of water to the
wash tank. Refer to figure 1-11. The solenoid activates whenever the drive motor is on.
Water flows from the water inlet through the flow restrictor. This reduces the flow rate
to 3/4 gallons per minute (min [2.8 liters per min]). The water then flows through the
solenoid valve and into the wash tank.
Figure 1-11. Water solenoid and flow restrictor (exploded view).
(c) Check the operation of the water fill solenoid by turning the power
switch to ON. The solenoid valve should click on and water should flow into the wash
tank. When the transport system turns off, water should stop flowing.
(d) The solenoid valve is located just behind the electrical panel, on the
left side of the processor. Power is supplied to it through relay K2. Check the
approximate line voltage between TS6-7 and TS6-12 when you activate the transport
system. If there is proper voltage but the valve does not operate, you may need to
replace the coil, or remove and repair or replace the valve. See Lesson 4, Remove and
Replace or Repair Defective Components of X-ray Film Processors.
(e) Refer to 1-2b(2) for methods of controlling algae growth.