Kyocera Mita DF-75, Service Manual

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CHAPTER 2 OUTLINE OF OPERATION
24 V
5 V
Finisher
controller
PCB
24 V
5 V
5 V
Punch controller PCB
Motors
Sensors
Logic system
8.2 Puncher Unit (option)
8.2.1 Outline
When the host machine is turned on, the puncher unit is supplied by the finisher controller
PCB with 24-V and 5-V power.
The 24-V power is used to drive the motors, while the 5-V power is used by sensors and
the ICs on the punch controller PCB.
The 24-V power to the motors will be cut off when the joint switch (MS2) or the front door
switch (MS1) of the finisher unit is open.
F02-802-01 is a block diagram for the power supply system:
F02-802-01
8.2.2 Protective Mechanisms
The 24-V system used to drive the punch motor (M1P) and the horizontal registration mo-
tor (M2P) is equipped with a built-in fuse which melts in the presence of overcurrent.