Protection Function; Protective Functions; Backup Battery; Energy-Saving Function - Canon iR6570 series Service Manual

Chapter 10

10.4.3 Protection Function

10.4.3.1 Protective Functions

The machine's DC power supply PCB and the power supply PCB for its accessories are equipped with overcurrent and overvoltage protective functions
that will cut off power to prevent damage to circuitry in the event of an overcurrent or overvoltage occurring as a result of a short circuit or other fault.
A fault in 3VB (uninterruptive power supply) will cut off all power of the machine; on the other hand, a fault in any other power supply will cut off all
power to loads other than 3VB (uninterruptive power supply).
If a fault has occurred in 3VB (uninterruptive power supply), turn off the main power switch of the printer unit, and remove the cause that has activated
the protective circuit; then, replace the DC power supply PCB. (The fuse on the DC power supply PCB is likely to have blown.)
Other than that, turn off the main power switch of the printer unit, and remove the cause that has activated the protective circuit; then, leave the machine
alone for about 3 min or more, and turn the power back on to reset the protective circuit.

10.4.4 Backup Battery

10.4.4.1 Backup Battery
The machine's main controller PCB is equipped with a lithium battery that serves as a source of backup power to retain various data in the event of a power
outage or disconnection of the power plug.
Main control PCB
Battery life
Battery replacement
You must always be sure that the battery is replaced correctly. Be sure to replace it with a battery of a type indicated by the manufacturer of the unit (bearing
the same model name or equivalent).
Be sure also to dispose of the removed battery as instructed by the manufacturer of the battery.

10.4.5 Energy-Saving Function

10.4.5.1 Outline

1. Standby State
When the machine is in a standby state, all its loads are supplied with power and the machine is ready to start operation at any time.
2. Sleep State
2-1. Sleep 1
When the machine is in sleep 1, its laser scanner will not rotate even when a key on the control panel is pressed.
2-2. Sleep 3
When the machine is in sleep 3, only 3VB on the DC power supply PCB is supplied with power.
The machine moves from sleep 3 to standby in response to the following:
- print job
- press on the control panel power switch
- fax reception
- fax delayed transmission
The following shows the loads that remain supplied with power when the machine is in sleep 3.
10-10
T-10-16
Output
Uninterruptive/
interruptive
Rated output
Power supply
tolerance
T-10-17
manganese dioxide lithium battery
(3 V, 1000 mAh)
main controller PCB: about 8.8 yr
(with power plug disconnected)
not possible in the field on its own
24VA
interruptive
24V
+7-5%
0009-4543
0009-4544
0009-4545