Protective Mechanism - Canon Finisher-AB1 Service Manual

Chapter 3

3.8.2 Protective Mechanism

0015-2101
The machine is equipped with protective mechanisms that will automatically shut off the output voltage to
prevent damage to the power supply circuit in the event of over-current or over-voltage caused, for example, by
a short-circuit in any of its loads.
If DC output is absent in the power supply circuit, suspect that the over-current or over-voltage protective
mechanism has gone on. Turn off the power switch (SW301), remove the cause of the fault, and turn the power
back on.
In addition to the foregoing mechanism, the machine uses the following:
- fuse
The power supply circuit is fitted with 2 fuses which blow to shut off the power in response to over-current in
the AC line.
- Interlock Switch
The machine's external covers and safety levers are fitted with a total of 7 microswitches which go off to cut off
the power supply when a specific cover is opened or a specific lever is operated.
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