Power Supply System - Sharp AR-FN8 Service Manual

CHAPTER 4 PUNCHER UNIT (OPTION) BASIC OPERATION
III. POWER SUPPLY SYSTEM
1. Outline
24V power and 5V power are supplied from the finisher controller PCB when the power switch
on the host machine is turned ON.
24V power is used for driving motors, while 5V power is used for driving sensors and the ICs
on the punch driver PCB.
24V power to the motors is not supplied when even either of the two door switches on the
puncher unit is open.
Finisher
controller
PCB
2. Protection Function
The 24V power supplies for the punch motor (M1P) and horizontal registration motor (M2P)
are equipped with a fuse designed to blow when an overcurrent flows.
4-14
24V
Punch driver PCB
5V
Figure 4-301
Front door
switch
(MS2P)
24V
Motor system
5V
Sensors
5V
Logic