Power Supply; Outline; Protective Functions - Canon Staple Finisher-D1 Service Manual

2
Technology > Power Supply > Protective Functions

Power Supply

Outline

This machine incorporates the power supply PCB to supply DC power to every PCB.
The following table summarizes functions of DC power supply units.
Name
Power supply PCB
Front door switch (SW101)
Swing guide safety switch (front) (SW102)
Staple position switch (SW103)
Swing guide safety switch (rear) (SW104)
Tray 1 lower safety switch (SW110)
Escape tray lower safety switch (SW111)

Protective Functions

Protective Functions
The 24VDC circuits (used for driving solenoids, etc.) on the finisher controller PCB and saddle stitcher controller PCB are provided with a fuse or a motor driver with an overcurrent protective function.
The 24VDC input circuit of each controller PCB is also provided with a fuse which is blown when an excessive current flows.
Power supply unit is provided with an overcurrent/overvoltage protective function to shut off the output voltage automatically when an excessive current or voltage occurs due to a problem on the load
side (e.g., short-circuiting), thus protecting electric circuits.
Each circuit is provided with a fuse which is blown when an excessive current flows in the AC line, thus shutting off the excessive AC current.
2 Technology > Power Supply > Protective Functions
Function
Generates DC power (24V) and supplies DC power to the finisher controller
PCB and saddle stitcher controller PCB.
Turns on/off the 24V
T-2-12 T-2-12
2-34
2-34