Canon NP6251 Service Manual page 137

+12V
Power
DC controller
supply
PCB
unit
Comparison circuit
J01
-5
-6
Thermistor
TH
COPYRIGHT © 1997 CANON INC.
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supply switch
AC driver
Drum heater
drive circuit
+ --
Trigger circuit
Drum heater controller PCB
Figure 4-122
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 4 IMAGE FORMATION SYSTEM
SW1
Power
SW3
Drum heater
Door switch
switch
Triac
J01-1
AC
Power supply
SW2
Drum
heater
TP3
4-23