Read Sharp MX-FN30 / MX-FN31 Service Manual online
MX-FN30/FN31 Technical Explanation 3K Finisher 6 – 38
10. Power Supply
A. Power Supply Route
The 24V and 12V are supplied to the finisher controller PWB when the host machine is turned on. The 24V is converted into 5V and 3.3V by the reg-
ulator IC (IC14/IC16) on the finisher controller PWB and is used to drive the motors and clutches and fan and the 5V is used to drive the sensors and
switches and the 3.3V is used to drive the logic.
The 24V is shut down when the opening of the front cover or swing guide is detected by the front cover switch (SW101) or swing guide safety switch
(SW102). The 24V and 5V are supplied to the saddle stitcher controller PCB and options. The 24V supplied to the saddle stitcher controller PWB is
used to drive the motor and 5V is converted into the 3.3V by the regulator IC (IC5) on the saddle stitcher controller PWB.
ulator IC (IC14/IC16) on the finisher controller PWB and is used to drive the motors and clutches and fan and the 5V is used to drive the sensors and
switches and the 3.3V is used to drive the logic.
The 24V is shut down when the opening of the front cover or swing guide is detected by the front cover switch (SW101) or swing guide safety switch
(SW102). The 24V and 5V are supplied to the saddle stitcher controller PCB and options. The 24V supplied to the saddle stitcher controller PWB is
used to drive the motor and 5V is converted into the 3.3V by the regulator IC (IC5) on the saddle stitcher controller PWB.
B. Protection Function
The 24V circuits (used to drive the motors and clutches and fan) are provided with the fuses or the motor drivers with an overcurrent protective func-
tion to provide protection from the over current.
The power input circuit of each controller PCB is also provided with a fuse which is blown when an excessive current flows.
tion to provide protection from the over current.
The power input circuit of each controller PCB is also provided with a fuse which is blown when an excessive current flows.
11. Service Tasks
A. Upgrading
When upgrading the firmware of the finisher controller PCB and the saddle stitcher controller PCB, upgrade from the host machine. (Refer to the ser-
vice manual for the host machine as to the detail.)
vice manual for the host machine as to the detail.)
Sensor/Switch
Host
Machine
24V
Fuse
Fuse
(FU7)
(IC16)
Regulator IC
3.3V
Logic
Swing Guide Safety Switch
(SW102)
Front Cover Switch
(SW101)
(FU4)
24V
Motors
24V
Clutches
Fuse
(FU22)
Fuse
(FU1)
Inserter
(IC14)
Regulator IC
5V
5V
24V
Finisher Controller PCB
Fuse
(FU1)
(IC5)
Regulator IC
3.3V
Logic
5V
Fuse
(FU2)
Sensor
24V
Motor
Driver IC
5V
Options
Motors
24V
Saddle Stitcher Controller PCB
Motor
Driver IC
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