Punch Power Supply - Canon SADDLE FINISHER K3 Service Manual

7.1.9 Punch power supply

The power supply route for the punch is illustrated below. 36VPNH and 24VPNH, sup-
plied by the punch driver PCB, are turned ON/OFF by the PC_POWER_ON signal and the
PFANON signal from the finisher controller PCB. The PNHON signal can be turned ON/
OFF by the user, using SW971-1 on the switch PCB.
The 5V power supply for sensor drive is turned ON/OFF by the PNHON signal
PC_POWER_ON. 36VPNH, 24VPNH and 5V are supplied from the punch driver PCB to
each load.
Fuse box PCB
24VPNH
Finisher
controller
OPSW board
SW971-1
IC114
COPYRIGHT© 2001 CANON INC.
PCB
5V
PCH_Kill
PCH_POWER ON
2000 2000 2000 2000
CHAPTER 2 OPERATION OVERVIEW
Punch driver PCB
Q750
Q752
Q751
F02-701-15
CANON SADDLE FINISHER K3/K4 REV.0 MAR. 2001
Q757
Motors
Fans
Sensors
LEDs
Sensors
2-83