Power Supply System - Sharp AR-F15 Service Manual

CHAPTER 2 FINISHER UNIT BASIC OPERATION
III. POWER SUPPLY SYSTEM
1. Outline
The finisher controller PCB is supplied with 24 VDC power when the host machine is turned
F15/F16
on. Power is also supplied from the finisher controller PCB to the saddle stitch controller PCB. In
addition, power is also supplied to the punch driver PCB when the optional puncher unit is mounted.
Some of the 24 VDC power used to drive motors is cut off when the door switch (MS1) is open.
The power to the saddle stitch controller PCB, however, will not be cut off.
Figure 2-301 is a block diagram showing the power supply system.
F15/F16
2. Protection Functions
The 24 VDC power line used to drive motors and solenoids is equipped with a circuit breaker
(CB1) for protection against overcurrent. The 24 V line used to drive the first feed motor (M1),
alignment motor (M3), and stapler shift motor (M4) are equipped with a fuse, which is designed to
blow when an overcurrent occurs.
2-56
Power source
Figure 2-301