TM 5-3610-285-14
(b)
Circuit board 1000.
1
This low is sensed on pin 3 of voltage inverter U1 on the water control circuit.
2
Transistor Q1 (PNP Darlington) turns on with a low at pin 13 of voltage inverter U1.
3
This brings the output of Q1 low.
(c)
Circuit board 500.
1
This low is sensed on pin 14 of voltage inverter U1, of the standby control circuit. With film present in the
detector roller assembly, voltage inverter U1, pin 3, goes low.
2
This dissatisfies AND gate U6, pin 3, with a low, thereby dissatisfying AND gate U5, pin 10, with a high.
Flip-flop U9, pin 2, now changes state from a low to a high. With the dryer at operating temperature (AND gate U6, pin
13, high), AND gate U6 becomes dissatisfied with a low at pin 4. With the low at pin 11, of standby timer U3, the
processor now goes out-of standby mode (pin 8 goes high)land into the normal or run operating mode.
5-16
