Canon NP-70 Service Manual page 81

3-42
NP•70
+24VDC
The following figure
(3-9) shows the heater wait control circuit and its associated com-
ponents. The operation of this circuit is explained in the flowchart (Fig. 3-10) and table
(3-5) accompanying.
r
TH2
l
ovDc o
PL1
COMP.
K14
K14
Q47
R134
NETWORK.
AMP
CON.
CON.
K14
iCHMITT
CKT.
Q49
I
I
I
I
HEATER WAIT CON. CKT. CARD
I
--J
PART OF
TIME CKT.
CARD
K7
Q19
Q20
Q16
o +24VDC
~
O OVDC
I
I
Fig. 3-9
Heater Wait Control Circuit &Associated Components
Second Printing,lune, 1974
© CANON INC.