Canon iR5055, Service Manual

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Chapter 10
10-8
T-10-16
10.4.3 Protection Function
10.4.3.1 Protective Functions
0015-4637
iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N
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
0015-4638
iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N
The machine's main controller PCB and DC controller PCB are equipped with each of one 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.
T-10-17
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 Overview
0015-4639
iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N
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.
Output 24VA
Uninterruptive/
interruptive
interruptive
Rated output 24V
Power supply
tolerance
+7-5%
Battery specifications manganese dioxide lithium battery
(3 V, 1000 mAh)
Battery life main controller PCB: about 8.8 yr
(with power plug disconnected)
Battery replacement not possible in the field on its own