Canon NP-70 Service Manual page 87

NP•70
3-49
As shown in the flowchart, the copier goes to STANDBY automatically when the developer
level drops. In this case, it is necessary to refill the Developer Assembly before copy opera-
tions can be resumed.
3.4-7
DEVELOPER TEMPERATURE CONTROL CIRCUIT (ALL COPIERS)
The developer temperature control circuit operates to limit the temperature in the vicinity of
the Developer Assembly to 42 ± 3°C through the turning ON of FM3. This action prevents
the excessive evaporation of the dispersant carrier of the developer fluid which occurs at high
copier body temperatures.
Fig. 3-14 shows the developer temperature control circuit and its associated components.
LINE AC p
+24VDC p
+5 VDC p
OVDC O
LINE AC p
r —
DEVELOPER TEMP. CON, CKT. CARD
VOLT.
DIVID.
L—_
TH3
CURRENT
SHARING
NETWORK
MS4
K7 CON.
K301
Q303
K301 CON.
FM3
Fig. 3-14 Developer Temperature Control Circuit &
Associated Components
© CANON INC.
Second Printing,lune, 1974