Canon NP-70 Service Manual page 88

3-50
NP•70
1) OPERATION
This circuit activated cooling fan FM3 whenever the simultaneous conditions of high temper-
ature and drum rotation are present. This sequence can be seen in the flowchart in Fig. 3-15.
STEP 1DT
COPIER TEMPERATURE - "HI"
~— TH3 RESISTANCE - "LO"
Q301 - "ON"
~— Q302 - "OFF"
~— Q303 - "OFF"
~— K30I - "OFF"
~- FM3 ACTIVATION PATH-CLOSED
Fig. 3-IS Developer Cooling Flowchart
FM3 - "ON"
NO EFFECT UNTIL NEXT COPY CYCLE
As shown in the flowchart, operation of FM3 is the result of the circuit action which de-
energizes relay K301 to close the activation path for cooling fan FM3.
Second Printing,lune, 1974
© CANON INC.