Protection Function; Protective Functions; Backup Battery; Outline - Canon iR1200 Series Service Manual

Chapter 9

9.2.2 Protection Function

9.2.2.1 Protective Functions

The power supply PCB is equipped with an over-current/over-voltage protection mechanism to prevent damage to
the power circuit in the event of an over-current or over-voltage, as caused by a short circuit or the like on the load
side. If the over-current/over-voltage protective mechanism has gone ON, disconnect the power cord, and correct the
fault; then, connect the power cord once again to reset the machine. If short circuiting and resetting are repeated, the
internal fuse (F1, F2, F101) can melt.

9.2.3 Backup Battery

9.2.3.1 Outline

The machine's image processor PCB is equipped with a lithium battery (BAT1) and a vanadium lithium secondary
battery (BAT2) for back-up of the data in the SRAM and the SDARM in consideration of a power outage or when
the power is turned off.
The batteries must be replaced correctly to avoid explosion.
Do not replace any battery with one not indicated for the machine, i.e., use one of the same type or equivalent.
Be sure to dispose of used batteries according to local laws and regulations.

9.2.3.2 Lithium Battery (BAT1)

The data backed up in the SRAM by the lithium battery (BAT1) contains user data for fax functions, communications
control data, and service mode settings.
Battery life: about 5 yr
The LCD will indicate 'DATA ERROR' when the power is tuned on after the lithium battery (BAT1) has reached the
end of its life. If such a condition has occurred, be sure to replace the image processor PCB according to the
instructions.
If you disconnect the jumper plug (JP1) of the image processor PCB and turn off the power, all control data will be
reset to default settings. Do not disconnect the jumper plug (JP1) to prevent the loss of data.
MEMO:
The pin of the jumper plug (JP1) is displaced on the image processor PCB available as a service part so as to prevent
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